CA2038042A1 - Auto exhaust extension - Google Patents
Auto exhaust extensionInfo
- Publication number
- CA2038042A1 CA2038042A1 CA 2038042 CA2038042A CA2038042A1 CA 2038042 A1 CA2038042 A1 CA 2038042A1 CA 2038042 CA2038042 CA 2038042 CA 2038042 A CA2038042 A CA 2038042A CA 2038042 A1 CA2038042 A1 CA 2038042A1
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- CA
- Canada
- Prior art keywords
- hose
- clamping arm
- exhaust
- clamping
- handle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Abstract
ABSTRACT
An auto exhaust extension is disclosed having a pair of opposed, hand operable clamping elements mounted on an extension hose side wall. One of the clamping elements projects into the hose interior through the hose side wall and points generally toward the open end of the hose. The other clamping element is located on the exterior of the hose and extends longitudinally therealong towards the end of the tube and terminates in a partial circumferential strap which is rigidly secured to the hose. The clamping elements are provided with handles which are located on the exterior of the hose. The handles are pivotally coupled together and have a spring disposed between them for biasing the handles apart which acts to compress the portion of the clamping element located on the hose interior against the side wall of the hose. An aperture is formed between the tail pipe and the exhaust hose at the open end of the hose which permits air to be drawn into the hose when the vehicle engine is running to prevent the extension hose from overheating.
An auto exhaust extension is disclosed having a pair of opposed, hand operable clamping elements mounted on an extension hose side wall. One of the clamping elements projects into the hose interior through the hose side wall and points generally toward the open end of the hose. The other clamping element is located on the exterior of the hose and extends longitudinally therealong towards the end of the tube and terminates in a partial circumferential strap which is rigidly secured to the hose. The clamping elements are provided with handles which are located on the exterior of the hose. The handles are pivotally coupled together and have a spring disposed between them for biasing the handles apart which acts to compress the portion of the clamping element located on the hose interior against the side wall of the hose. An aperture is formed between the tail pipe and the exhaust hose at the open end of the hose which permits air to be drawn into the hose when the vehicle engine is running to prevent the extension hose from overheating.
Description
~3~ 2 This invention relates to devices for coupling vehicle engine exhaust pipes to extension hoses for venting exhaust fumes.
Automobile repair shops require quick and ef~icient means for coupling vehicle tail pipes to the exhaust systems for directing vehicle exhaust fumes outdoors when the engine is being run durinq vehicle maintenance.
Presently available coupling devices for connectiny vehicle tail pipes to auto-shop exhaust systems are of several general types. One type, as exemplified by United States Patent No. 2,733,668 (Pfetzing), utilizes a hook and chain assembly attached to one end of an exhaust extension hose, the other end of which is interconnected with the building exhaust system. The hose has a yenerally flared end portion which fits over the end of the automobile tail pipe and is loosely secured thereto by hooking the chain over the rear bumper of the car. There are two drawbacks to this type of arrangement. Firstly, many vehicles built today do not have rear bumpers designQd in such a way that hooks can be easily attached thereto. Secondly, this type of arrangement would not work on vehicles having vertically disposed exhaust pipes such as trucks where the engine exhaust pipes are located just behind the cab compartment and have no place to which the hooks can be attached.
Accordingly there is a need to provide an exhaust extension which can be coupled to a vehicle tail pipe without having to utilize any other portion of the vehicle.
A second type of exhaust coupling device utilizes an intermediate connector which is coupled at one end to an automobile tail pipe and at the other end to an exhaus~
hose. United States Patent No. 2,667,372 (Gardner) discloses such a device wherein the coupling device includes a housing having a lid which can be biased closed using either screws or a spring biasing means. The tail pipe is inserted into the housing and the lid is closed which acts to retain the tail pipe therein. A drawback to this type of arrangement is that the housing could easily slip off a straight tail pipe unless a tight fit is achieved between the housing and the tail pipe.
lS
United States Patent No. 2,467,922 (Woytal et al) also discloses an intermediate coupling device between the tail pipe and an extension hose but wherein the coupling device is secured to the tail pipe by means of set screws.
The coupling is designed in such a way as to produce an air-tight joint. One drawback to this type of retaining method is that the set screws may become loose due to strong vibrations in the tail pipe when the vehicle engine is being run. Also, having air-tight connections can be deleterious in that sudden pressure gradients formed in the exhaust system will have an immediate impact on the engine running characteristics. ~nother general drawback to these devices is that they must be made of metal in order to 2J ~
withstand the heat from the engine exhaust.
The subject invention provides a clamping device for rigidly coupling a vehicle tail pipe to a generally larger diameter exhaust extension hose tube.
According to one aspecl of the invention, there is provided an vehicle exhaust extension hose clamp having a clamping element provided with means for moun~ing the clamping element on the side wall o~ an extension hose at a position spaced from the intake end of the hose wherein the clamping element points generally towards the open end of the hose on the interior of the hose. A receiving mouth is fGrmed between the portion of khe clamping arm which projects towards the open end of the hose and the inner side wall of the hose for receiving a vehicle tail pipe side wall therebetween. A biasing means is provided for biasing the clamping arm against the inner side wall of the exhaust hose ~or clamping said tail pipe therebetween.
There is an aperture formed between the end of the hose and the tail pipe clamped therain for causing air to be drawn into said hose when exhaust gases are being discharged ~rom the tail pipe.
In another aspect of the invention a quick release exhaust extension hose assembly includes an exhaust extension ho.se having an intake end portion adapted to fit loosely over a vehicle tail pipe thereby permitting air to 2 ~
be drawn into the inta~e end when axhaust gases are being discharged from a tail pipe located therein. The quick release assembly is provided with a clamping element having a clamping arm, said clamping element being mounted on the exhaust hose side wall at a position spaced from the hose intake end with the clamping arm extending toward the hose intake end on the interior of the hose. A receiving mouth is formed between the portion of the clamping arm which projects towards the open end of the hose and the inner side wall of the hose for receiving a vehicle tail pipe side wall therebetween. A biasing means is provided for biasing the clamping arm against the inner side wall of the exhaust hose for clamping said tail pipe therebetween.
According to yet another aspect of the invention, a tail pipe extension includes a first clamping element provided with a first clamping arm and a first handle connected adjacently thereto at a first angle. A second clamping element is provided and includes a second clamping arm and a second handle connected adjacently thereto at a second angle, wherein the second angle is greater than the first angle. The clamping elements are pivotally coupled together at a point on the handles spaced from those ends of the handles opposed to the clamping arms. The pivotally coupled clamping elements are in registration. Provided is a means for mounting the coupled clamping elements in an opening in the wall of the exhaust hose at a point spaced from the intake end of the hose. The first clamping arm extends towards the exhaust hose intake end on the interlor of the hose and the second clamping arm is rigidly secured to the side wall of the exhaust hose. The handles are located on the exterior of the hose and extend outwardly therefrom. A spring is mount:ed between the handles for biasing the handles apart thereby urging the clamping arms together. When the handles are squeezed together, a receiving mouth is formed between the ~irst clamping arm and the inner side wall of the hose for receiving a tail pipe side wall therebetween. There is provided an air intake aperture between the intake end of the exhaust extension hose and a tail pipe clamped therein Por causing air to be drawn into said aperture when vPhicle exhaust is being emitted through the tail pipe.
In still another aspect of the invention a method of making a quick release exhaust extension includes providing an axhaust extension hose having an intake end dimensioned to slide over a vahicle tail pipe thereby permitting air to be drawn into the intake end around the tail pipe when vehicle exhaust is being emitted through the tail pipe. A clamping element having a clamping arm and a handle portion connected adjacent thereto is inserted into an opening formed in the side wall of the hose, the opening being spaced from the intake end of the hose. Movement of the handle causes the clamping arm to move away from and toward the interior wall o~ the exhaust hose for inserting and removing a tail pipe therebetween. The clamping element 2~3~2 is biased so that the clamping arm portion is biased ayainst the inner wall surface of the extension hose ~or clamping a tail pipe sidewall therebetween.
Preferred and alternative embodiments of the invention will now be described by way of example with reference to the accompanying drawings, in which:
Figure 1 is a vertical side view of an automobile coupled to a garage exhaust system using the auto exhaust extension of the subject invention;
Figure 2 is a perspective view of the auto exhaust extension of the present invention;
Figure 3 is a sectional side view of the auto exhaust extension of Figure 2;
Figure 4 is a sectional side view of an alternative embodiment of the auto exhaust extension of the present invention;
Figure 5 is a sectional side view of another embodiment of the auto exhaust extension of the present invention;
Figure 6 is a sectional side view of yet another embodiment of the auto exhaust extension of the present invention; and Figure 7 is a sectional view of the auto exhaust extension taken along lines 7-7 of Figure 6.
Referring first to Figure 1, an auto exhaust extension 10 embodying the subject invention is shown which includes a clamp 11 mounted on the side wall of an exhaust hose 12. Generally, hose 12 forms a component part of a building exhaust system 14 for routing vehicle exhaust fumes from a vehicle 16, wherein vehicle 16 is provided with a tail pipe 18 through which the engine exhaust is emitted.
Referring now to Figures 2 and 3, hose 12 has an intake end portion 20 which fits over the end of tail pipe 18, being a generally larger diameter hose than tail pipe 18. Clamp 11 includes a pair of pivotally coupled, hand-operable clamping elements 22 and 24. Clamping element 22 2Q is mounted on the exterior of hose 12 and includes a first clamping arm 26 which extends longitudinally along the exterior of hose 12 to the end of hose 12. Clamping element 22 is provided with a strap 28 rigidly attached to the end of clamping arm 26 and orientated transversely thereto.
Strap 28 and arm 26 are preferably formed as one piece.
Strap 28 partially encircles the circumference of the end portion of hose 12 and is secured thereto using a strong adhesive such as epoxy. Alternatively, strap 28 may be ~3~
secured to the end of hose 12 with a plurality o~ rivets or nuts and bolts. Clamping element 22 is provided with a handle or handgrip 30 connected adjacent to arm 26 at a f rst angle. Handle 30 and arm 26 are preferably formed as one piece at the time of fabrication.
Clamping element Z4 includes a clamping arm 32 which projects through the side wall of hose 12 into the interior there,of and which points generally toward intake end 20. Clamping element 24 is provided with a handle 34 connected adjacent to arm 32 at a second angle, wherein the second angle is greater than the clamping element first angle. Handle 34 is located on the exterior of hose 12 and in registration with handle 30. ~andle 34 is preferably formed with arm 32 as one piece at the time of fabrication and along with handle 30 may be provided with handle covers or grips (not shown).
Handles 30 and 34 are each provided with a pair of inwardly projecting arms 36 and 38 respectively which are integrally formed therewith. A mounting pin'or rivet 40 pivotally couples elements 22 and 24 by passing transversely through overlapping arms 36 and 38. Clamp 11 is provided with an expansion' spring 42 (see Figure 3) secured between elements 22 and 24 for biasing handles 30 and 34 apart thereby urging arms 26 and 32 together. When handles 30 ,and 34 are s~ueezed together (see Figure 2), a receiving mouth 44 is formed between clamping arm 32 and ` 2~,3~
the side wall of hose 12.
While clamp 11 as described above is mounted with clamping element 22 secured to the exterior of hose 12, it will be appreciated that in an alternative embodiment (not shown) both clamping arms could be located on the interior of a ventilation tube with t:he handles located on the exterior of the tube. The cla~mping arm adjacent the tube side wall would be secured to the inner tube side wall and the receiving mouth would be formed between the two clamping elements when the handles are squeezed together.
When a flexible rubber tube is utilized ~or exhaust hose 12, clamp 11 may be mounted on the side wall of hose 12 by slitting a portion of hose 12 at a predetermined distance from the end of hose 12, squeezing handles 30 and 34 together thereby spreading portion 26 and arm 32 apart, and inserting arm 32 through the slit. Strap 28 is then secured circumferentially around the outside of the end portion of hose 12 by bonding using an appropriate strong epoxy or other such adhesive or it can be bolted to tube 12. Alternatively, exhaust hose 12 may be fabricated of metal wherein clamp 11 may be mounted by cutting out a narrow slot in the side wall of hose 12 and clamp ll mounted in essentially the same way. Thus clamp 11 may be utilized with a variety of different hose types.
Clamp 11 can be manufactured from readily available and conventional materials using standard fabrication processes. For example, clamping elements 22 and 24 may be made from stainless steel sheet stampings and the handle covers made from injection moulded neoprene foam rubber. Or alternatively, clamping elements 22 and 24 ma~ be made from a suitable plastic of appropriate thicXness in which case handle covers would not be required. Spring 42 could be fabricated from plated formecl spring steel wire.
10In operation, with automobile 16 pre-positioned within the auto-shop, clamp 11 is gripped b~ handles 30 and 34 which are squee~ed together thereby forming mouth 44.
Intake end portion 20 of hose 12 is inserted over the open end of tail pipe 18 wherein the side wall of tail pipe 18 15is received by mouth 44. Handles 30 and 34 are then released which closes mouth 44 thereby securely engaging the side-wall of tail pipe 18 therebetween. In this way, tail pipe 18 is eccentrically situated with respect to tube 12 and, owing to the larger diameter of hose 12 with respect to tail pipe 18 provides an opPning or aperture 46 (see Figure 4) therebetween when tail pipe 18 and tube 12 are coupled. When the vehicle engine is running, exhaust fumes flow through tail pipe 18 and hose 12 which acts to draw cool air into hose 12 through aperture 46. When exhaust hose 12 is fabricated using rubber, the drawing in of cool air during operation prevents hose 12 ~rom burning up due to the hot exhaust gases. In addition, the presence of aperture 46 improves the exhaust gas flow through tube -- 10 _ 12 in that if a low pressure develops in hose 12, ambient air will be drawn in to hose 12 through aperture 46 rather than tail pipe 18 being pumped on, which would adversely effect the engine characteristics. Similarly, if the exhaust system suddenly becomes over-pressurized, aperture 46 provides a pressure release thereby preventil~g the over-pressurizing of tail pipe 18 which can also adversely effect engine running characteristics when performing various engine tuning procedures.
While the auto exhaust extension shown at 10 in Figure 2 utilizes a partial bircumferential strap 28, it will be understood that in an alternative embodiment (not shown), a full circumferential strap could be employed just as readily. However, the advantage of the partial circumferential strap is that it can be fitted to any size ventilation tube, while the embodiment employing the full circumferential strap would be restricted to one size of tubing.
It will be appreciated that while the auto exhaust extension clamp described herein is adapted to be used in auto shop applications b~ being mounted on a ventilation tube connected to tha building ventilation system, it can be utilized in other ways. Specifically, it has applications for home auto repairs and tune~ups wherein the automobile is being repaired in the garage. A clamp such as that shown at 11 in Figure 2 can be mounted on a length o~
flexible tubin~ such as that shown at 12 in Figure 2 which is of suffici2nt length such that when coupled to the auto tail pipe, the free end can be placed outside the garage so that the engine can be safely run while repairs are undertaken.
Figure 4 illustrates an alternative embodiment of an auto exhaust extension shown at 50. In this embodiment, primed reference numerals are used to indicate parts that are similar to corresponding parts of the embodiments shown in Figures ~ and 3. A clamp 51 is structurally similar to clamp 11 and operates in essentially the same way. In this embodiment, a separate rigid sleeve 53 is attached to a flexible hose 12' using rivets 55. If sleeve 53 is made of steel, arm 26' is spot welded to it, otherwise, it is attached in any suitable manner as discussed above.
Referring now to Figure 5, an alternative embodiment of an exhaust extension shown generally at 60 includes a clamp 61 mounted on the side wall of a hose 62 and includes a clamping arm 64 projecting toward an intake end of hose 62. Arm 64 is coupled to the side wall of hose 62 by a mount 66. Mount 66 is secured to the side wall of hose 62 by a threaded bolt 70. Bolt 70 is inserted through an exterior mounted washer 72 and a hole in the side wall of hose 62. Mounting bracket 66 further comprises a threaded stud 74 and associated retainin~ nut 76. Clamp 61 is pro~ided with a spring 78 mounted between bracket 68 and 6 ~ t~ `) J
clamping arm 64 for biasing arm 64 against the inner side wall of hose 62. Arm 64 has a slot 80 which receives stud 74 therethrough thereby enabling arm 64 to pivot about stud 74. A receiving mouth 82 is formed bstween arm 64 and the side wall of hose 62 for receiving a tail pipe 84 therebetween.
Referring now to Figures 6 and 7, yet another embodiment of an auto exhaust extension is shown at 90 and includes a clamp 91 mounted on the side wall of an exhaust hose 92. Clamp 91 includes a clamping element 94 which comprises a handle 96 located on the axterior of hose 92 and a clamping arm 98 integrally formed with handle 96 and which is located on the interior of hose 92 and pointing generally toward the open end thereof. Clamp 91 is provided with a tension spring 100 securely attached between hose 92 and handle 96 ~or biasing arm 98 against the inner side wall of hose 92 as indicated by the solid lines in Figure _ 6. A receiving mouth 102 is formed between ~lamping arm 98 and the inner side wall of hose 92 when handle 96 is rotated toward the open end of hose 92, indicated by the broken lines in Figure 6. Clamping arm 98 is fabricated narrower than handle 96 in order to prevent handle 96 from slipping through the opening in hose 92. Hose 92 is preferably fabricated from extruded plastic or metal.
It will be appreciated that the auto exhaust extension o:E the subject invention can be utilized not only 2 ~
for coupling exhaust extensions to automobile tail pipes, but also for coupling Pxhaust extensions to any vehicle exhaust pipe, such as vertically disposed exhaust pipes found on various types of trucks and the like. The clamp disclosed herein can be fitted to any diameter hose suitable for any size exhaust pipe, including automobiles having double tail pipes as well as heavy trucks with exhaust pipes several inches in diameter.
While the present invention has been described and illustrated with respect to the preferred and alternative embodiments, it will be appreciat~d that numerous variations of these embodiments may be made without departing from the scope of the invention, which is defined in the appended claims.
_ 14 _
Automobile repair shops require quick and ef~icient means for coupling vehicle tail pipes to the exhaust systems for directing vehicle exhaust fumes outdoors when the engine is being run durinq vehicle maintenance.
Presently available coupling devices for connectiny vehicle tail pipes to auto-shop exhaust systems are of several general types. One type, as exemplified by United States Patent No. 2,733,668 (Pfetzing), utilizes a hook and chain assembly attached to one end of an exhaust extension hose, the other end of which is interconnected with the building exhaust system. The hose has a yenerally flared end portion which fits over the end of the automobile tail pipe and is loosely secured thereto by hooking the chain over the rear bumper of the car. There are two drawbacks to this type of arrangement. Firstly, many vehicles built today do not have rear bumpers designQd in such a way that hooks can be easily attached thereto. Secondly, this type of arrangement would not work on vehicles having vertically disposed exhaust pipes such as trucks where the engine exhaust pipes are located just behind the cab compartment and have no place to which the hooks can be attached.
Accordingly there is a need to provide an exhaust extension which can be coupled to a vehicle tail pipe without having to utilize any other portion of the vehicle.
A second type of exhaust coupling device utilizes an intermediate connector which is coupled at one end to an automobile tail pipe and at the other end to an exhaus~
hose. United States Patent No. 2,667,372 (Gardner) discloses such a device wherein the coupling device includes a housing having a lid which can be biased closed using either screws or a spring biasing means. The tail pipe is inserted into the housing and the lid is closed which acts to retain the tail pipe therein. A drawback to this type of arrangement is that the housing could easily slip off a straight tail pipe unless a tight fit is achieved between the housing and the tail pipe.
lS
United States Patent No. 2,467,922 (Woytal et al) also discloses an intermediate coupling device between the tail pipe and an extension hose but wherein the coupling device is secured to the tail pipe by means of set screws.
The coupling is designed in such a way as to produce an air-tight joint. One drawback to this type of retaining method is that the set screws may become loose due to strong vibrations in the tail pipe when the vehicle engine is being run. Also, having air-tight connections can be deleterious in that sudden pressure gradients formed in the exhaust system will have an immediate impact on the engine running characteristics. ~nother general drawback to these devices is that they must be made of metal in order to 2J ~
withstand the heat from the engine exhaust.
The subject invention provides a clamping device for rigidly coupling a vehicle tail pipe to a generally larger diameter exhaust extension hose tube.
According to one aspecl of the invention, there is provided an vehicle exhaust extension hose clamp having a clamping element provided with means for moun~ing the clamping element on the side wall o~ an extension hose at a position spaced from the intake end of the hose wherein the clamping element points generally towards the open end of the hose on the interior of the hose. A receiving mouth is fGrmed between the portion of khe clamping arm which projects towards the open end of the hose and the inner side wall of the hose for receiving a vehicle tail pipe side wall therebetween. A biasing means is provided for biasing the clamping arm against the inner side wall of the exhaust hose ~or clamping said tail pipe therebetween.
There is an aperture formed between the end of the hose and the tail pipe clamped therain for causing air to be drawn into said hose when exhaust gases are being discharged ~rom the tail pipe.
In another aspect of the invention a quick release exhaust extension hose assembly includes an exhaust extension ho.se having an intake end portion adapted to fit loosely over a vehicle tail pipe thereby permitting air to 2 ~
be drawn into the inta~e end when axhaust gases are being discharged from a tail pipe located therein. The quick release assembly is provided with a clamping element having a clamping arm, said clamping element being mounted on the exhaust hose side wall at a position spaced from the hose intake end with the clamping arm extending toward the hose intake end on the interior of the hose. A receiving mouth is formed between the portion of the clamping arm which projects towards the open end of the hose and the inner side wall of the hose for receiving a vehicle tail pipe side wall therebetween. A biasing means is provided for biasing the clamping arm against the inner side wall of the exhaust hose for clamping said tail pipe therebetween.
According to yet another aspect of the invention, a tail pipe extension includes a first clamping element provided with a first clamping arm and a first handle connected adjacently thereto at a first angle. A second clamping element is provided and includes a second clamping arm and a second handle connected adjacently thereto at a second angle, wherein the second angle is greater than the first angle. The clamping elements are pivotally coupled together at a point on the handles spaced from those ends of the handles opposed to the clamping arms. The pivotally coupled clamping elements are in registration. Provided is a means for mounting the coupled clamping elements in an opening in the wall of the exhaust hose at a point spaced from the intake end of the hose. The first clamping arm extends towards the exhaust hose intake end on the interlor of the hose and the second clamping arm is rigidly secured to the side wall of the exhaust hose. The handles are located on the exterior of the hose and extend outwardly therefrom. A spring is mount:ed between the handles for biasing the handles apart thereby urging the clamping arms together. When the handles are squeezed together, a receiving mouth is formed between the ~irst clamping arm and the inner side wall of the hose for receiving a tail pipe side wall therebetween. There is provided an air intake aperture between the intake end of the exhaust extension hose and a tail pipe clamped therein Por causing air to be drawn into said aperture when vPhicle exhaust is being emitted through the tail pipe.
In still another aspect of the invention a method of making a quick release exhaust extension includes providing an axhaust extension hose having an intake end dimensioned to slide over a vahicle tail pipe thereby permitting air to be drawn into the intake end around the tail pipe when vehicle exhaust is being emitted through the tail pipe. A clamping element having a clamping arm and a handle portion connected adjacent thereto is inserted into an opening formed in the side wall of the hose, the opening being spaced from the intake end of the hose. Movement of the handle causes the clamping arm to move away from and toward the interior wall o~ the exhaust hose for inserting and removing a tail pipe therebetween. The clamping element 2~3~2 is biased so that the clamping arm portion is biased ayainst the inner wall surface of the extension hose ~or clamping a tail pipe sidewall therebetween.
Preferred and alternative embodiments of the invention will now be described by way of example with reference to the accompanying drawings, in which:
Figure 1 is a vertical side view of an automobile coupled to a garage exhaust system using the auto exhaust extension of the subject invention;
Figure 2 is a perspective view of the auto exhaust extension of the present invention;
Figure 3 is a sectional side view of the auto exhaust extension of Figure 2;
Figure 4 is a sectional side view of an alternative embodiment of the auto exhaust extension of the present invention;
Figure 5 is a sectional side view of another embodiment of the auto exhaust extension of the present invention;
Figure 6 is a sectional side view of yet another embodiment of the auto exhaust extension of the present invention; and Figure 7 is a sectional view of the auto exhaust extension taken along lines 7-7 of Figure 6.
Referring first to Figure 1, an auto exhaust extension 10 embodying the subject invention is shown which includes a clamp 11 mounted on the side wall of an exhaust hose 12. Generally, hose 12 forms a component part of a building exhaust system 14 for routing vehicle exhaust fumes from a vehicle 16, wherein vehicle 16 is provided with a tail pipe 18 through which the engine exhaust is emitted.
Referring now to Figures 2 and 3, hose 12 has an intake end portion 20 which fits over the end of tail pipe 18, being a generally larger diameter hose than tail pipe 18. Clamp 11 includes a pair of pivotally coupled, hand-operable clamping elements 22 and 24. Clamping element 22 2Q is mounted on the exterior of hose 12 and includes a first clamping arm 26 which extends longitudinally along the exterior of hose 12 to the end of hose 12. Clamping element 22 is provided with a strap 28 rigidly attached to the end of clamping arm 26 and orientated transversely thereto.
Strap 28 and arm 26 are preferably formed as one piece.
Strap 28 partially encircles the circumference of the end portion of hose 12 and is secured thereto using a strong adhesive such as epoxy. Alternatively, strap 28 may be ~3~
secured to the end of hose 12 with a plurality o~ rivets or nuts and bolts. Clamping element 22 is provided with a handle or handgrip 30 connected adjacent to arm 26 at a f rst angle. Handle 30 and arm 26 are preferably formed as one piece at the time of fabrication.
Clamping element Z4 includes a clamping arm 32 which projects through the side wall of hose 12 into the interior there,of and which points generally toward intake end 20. Clamping element 24 is provided with a handle 34 connected adjacent to arm 32 at a second angle, wherein the second angle is greater than the clamping element first angle. Handle 34 is located on the exterior of hose 12 and in registration with handle 30. ~andle 34 is preferably formed with arm 32 as one piece at the time of fabrication and along with handle 30 may be provided with handle covers or grips (not shown).
Handles 30 and 34 are each provided with a pair of inwardly projecting arms 36 and 38 respectively which are integrally formed therewith. A mounting pin'or rivet 40 pivotally couples elements 22 and 24 by passing transversely through overlapping arms 36 and 38. Clamp 11 is provided with an expansion' spring 42 (see Figure 3) secured between elements 22 and 24 for biasing handles 30 and 34 apart thereby urging arms 26 and 32 together. When handles 30 ,and 34 are s~ueezed together (see Figure 2), a receiving mouth 44 is formed between clamping arm 32 and ` 2~,3~
the side wall of hose 12.
While clamp 11 as described above is mounted with clamping element 22 secured to the exterior of hose 12, it will be appreciated that in an alternative embodiment (not shown) both clamping arms could be located on the interior of a ventilation tube with t:he handles located on the exterior of the tube. The cla~mping arm adjacent the tube side wall would be secured to the inner tube side wall and the receiving mouth would be formed between the two clamping elements when the handles are squeezed together.
When a flexible rubber tube is utilized ~or exhaust hose 12, clamp 11 may be mounted on the side wall of hose 12 by slitting a portion of hose 12 at a predetermined distance from the end of hose 12, squeezing handles 30 and 34 together thereby spreading portion 26 and arm 32 apart, and inserting arm 32 through the slit. Strap 28 is then secured circumferentially around the outside of the end portion of hose 12 by bonding using an appropriate strong epoxy or other such adhesive or it can be bolted to tube 12. Alternatively, exhaust hose 12 may be fabricated of metal wherein clamp 11 may be mounted by cutting out a narrow slot in the side wall of hose 12 and clamp ll mounted in essentially the same way. Thus clamp 11 may be utilized with a variety of different hose types.
Clamp 11 can be manufactured from readily available and conventional materials using standard fabrication processes. For example, clamping elements 22 and 24 may be made from stainless steel sheet stampings and the handle covers made from injection moulded neoprene foam rubber. Or alternatively, clamping elements 22 and 24 ma~ be made from a suitable plastic of appropriate thicXness in which case handle covers would not be required. Spring 42 could be fabricated from plated formecl spring steel wire.
10In operation, with automobile 16 pre-positioned within the auto-shop, clamp 11 is gripped b~ handles 30 and 34 which are squee~ed together thereby forming mouth 44.
Intake end portion 20 of hose 12 is inserted over the open end of tail pipe 18 wherein the side wall of tail pipe 18 15is received by mouth 44. Handles 30 and 34 are then released which closes mouth 44 thereby securely engaging the side-wall of tail pipe 18 therebetween. In this way, tail pipe 18 is eccentrically situated with respect to tube 12 and, owing to the larger diameter of hose 12 with respect to tail pipe 18 provides an opPning or aperture 46 (see Figure 4) therebetween when tail pipe 18 and tube 12 are coupled. When the vehicle engine is running, exhaust fumes flow through tail pipe 18 and hose 12 which acts to draw cool air into hose 12 through aperture 46. When exhaust hose 12 is fabricated using rubber, the drawing in of cool air during operation prevents hose 12 ~rom burning up due to the hot exhaust gases. In addition, the presence of aperture 46 improves the exhaust gas flow through tube -- 10 _ 12 in that if a low pressure develops in hose 12, ambient air will be drawn in to hose 12 through aperture 46 rather than tail pipe 18 being pumped on, which would adversely effect the engine characteristics. Similarly, if the exhaust system suddenly becomes over-pressurized, aperture 46 provides a pressure release thereby preventil~g the over-pressurizing of tail pipe 18 which can also adversely effect engine running characteristics when performing various engine tuning procedures.
While the auto exhaust extension shown at 10 in Figure 2 utilizes a partial bircumferential strap 28, it will be understood that in an alternative embodiment (not shown), a full circumferential strap could be employed just as readily. However, the advantage of the partial circumferential strap is that it can be fitted to any size ventilation tube, while the embodiment employing the full circumferential strap would be restricted to one size of tubing.
It will be appreciated that while the auto exhaust extension clamp described herein is adapted to be used in auto shop applications b~ being mounted on a ventilation tube connected to tha building ventilation system, it can be utilized in other ways. Specifically, it has applications for home auto repairs and tune~ups wherein the automobile is being repaired in the garage. A clamp such as that shown at 11 in Figure 2 can be mounted on a length o~
flexible tubin~ such as that shown at 12 in Figure 2 which is of suffici2nt length such that when coupled to the auto tail pipe, the free end can be placed outside the garage so that the engine can be safely run while repairs are undertaken.
Figure 4 illustrates an alternative embodiment of an auto exhaust extension shown at 50. In this embodiment, primed reference numerals are used to indicate parts that are similar to corresponding parts of the embodiments shown in Figures ~ and 3. A clamp 51 is structurally similar to clamp 11 and operates in essentially the same way. In this embodiment, a separate rigid sleeve 53 is attached to a flexible hose 12' using rivets 55. If sleeve 53 is made of steel, arm 26' is spot welded to it, otherwise, it is attached in any suitable manner as discussed above.
Referring now to Figure 5, an alternative embodiment of an exhaust extension shown generally at 60 includes a clamp 61 mounted on the side wall of a hose 62 and includes a clamping arm 64 projecting toward an intake end of hose 62. Arm 64 is coupled to the side wall of hose 62 by a mount 66. Mount 66 is secured to the side wall of hose 62 by a threaded bolt 70. Bolt 70 is inserted through an exterior mounted washer 72 and a hole in the side wall of hose 62. Mounting bracket 66 further comprises a threaded stud 74 and associated retainin~ nut 76. Clamp 61 is pro~ided with a spring 78 mounted between bracket 68 and 6 ~ t~ `) J
clamping arm 64 for biasing arm 64 against the inner side wall of hose 62. Arm 64 has a slot 80 which receives stud 74 therethrough thereby enabling arm 64 to pivot about stud 74. A receiving mouth 82 is formed bstween arm 64 and the side wall of hose 62 for receiving a tail pipe 84 therebetween.
Referring now to Figures 6 and 7, yet another embodiment of an auto exhaust extension is shown at 90 and includes a clamp 91 mounted on the side wall of an exhaust hose 92. Clamp 91 includes a clamping element 94 which comprises a handle 96 located on the axterior of hose 92 and a clamping arm 98 integrally formed with handle 96 and which is located on the interior of hose 92 and pointing generally toward the open end thereof. Clamp 91 is provided with a tension spring 100 securely attached between hose 92 and handle 96 ~or biasing arm 98 against the inner side wall of hose 92 as indicated by the solid lines in Figure _ 6. A receiving mouth 102 is formed between ~lamping arm 98 and the inner side wall of hose 92 when handle 96 is rotated toward the open end of hose 92, indicated by the broken lines in Figure 6. Clamping arm 98 is fabricated narrower than handle 96 in order to prevent handle 96 from slipping through the opening in hose 92. Hose 92 is preferably fabricated from extruded plastic or metal.
It will be appreciated that the auto exhaust extension o:E the subject invention can be utilized not only 2 ~
for coupling exhaust extensions to automobile tail pipes, but also for coupling Pxhaust extensions to any vehicle exhaust pipe, such as vertically disposed exhaust pipes found on various types of trucks and the like. The clamp disclosed herein can be fitted to any diameter hose suitable for any size exhaust pipe, including automobiles having double tail pipes as well as heavy trucks with exhaust pipes several inches in diameter.
While the present invention has been described and illustrated with respect to the preferred and alternative embodiments, it will be appreciat~d that numerous variations of these embodiments may be made without departing from the scope of the invention, which is defined in the appended claims.
_ 14 _
Claims (23)
1. A clamp for clamping an intake end of a vehicle exhaust extension hose onto a vehicle tail pipe, comprising:
a) a clamping element having a clamping arm;
b) means for mounting the clamping element on the hose side wall with the clamping arm extending toward the exhaust hose intake end on the interior of the hose, wherein the mounting means is spaced from the hose intake end;
c) means defining a receiving mouth between the clamping arm and the interior of the hose side wall for receiving a tail pipe side wall therebetween;
d) means for biasing the clamping arm against the interior wall surface of the hose for clamping a tail pipe side wall therebetween; and e) means defining an air intake aperture between the intake end of the hose and a tail pipe clamped therein for causing air to be drawn into the intake aperture when exhaust gases are being discharged from a tail pipe located therein.
a) a clamping element having a clamping arm;
b) means for mounting the clamping element on the hose side wall with the clamping arm extending toward the exhaust hose intake end on the interior of the hose, wherein the mounting means is spaced from the hose intake end;
c) means defining a receiving mouth between the clamping arm and the interior of the hose side wall for receiving a tail pipe side wall therebetween;
d) means for biasing the clamping arm against the interior wall surface of the hose for clamping a tail pipe side wall therebetween; and e) means defining an air intake aperture between the intake end of the hose and a tail pipe clamped therein for causing air to be drawn into the intake aperture when exhaust gases are being discharged from a tail pipe located therein.
2. The clamp according to Claim 1 including means for mounting the clamping element in an opening in the wall of the exhaust hose, wherein the clamping element is provided with a handle portion connected to the clamping arm, wherein the handle portion is located on the exterior of the hose and extends outwardly therefrom, and wherein movement of the handle causes the clamping arm to move away from and toward the interior wall of the exhaust hose.
3. The clamp according to Claim 2 wherein the mounting means is a pivotal mounting means, wherein the biasing means extends between the handle and the tube side wall, and wherein moving the handle causes the clamping arm to move away from and toward the exhaust hose interior wall surface.
4. The clamp according to Claim 2 including a handgrip located on the exterior of the hose and rigidly secured thereto, wherein the handle and the handgrip are in registration, wherein squeezing the handle and the handgrip together causes the clamping arm to move away from the interior wall of the exhaust hose.
5. The clamp according to Claim 3 including a handgrip located on the exterior of the hose and rigidly secured thereto, wherein the handle and the handgrip are in registration, wherein squeezing the handle and the handgrip together causes the clamping arm to move away from the interior wall of the exhaust hose.
6. The clamp according to Claim 4 wherein the handgrip and the handle are pivotally coupled together at a point spaced from the ends of said handle and handgrip, and wherein the biasing means is a spring mounted between said handle and handgrip for urging said handle and handgrip apart.
7. A quick release exhaust extension hose assembly, comprising:
a) an exhaust extension hose having an intake end portion adapted to fit loosely over a vehicle tail pipe thereby permitting air to be drawn into the intake end portion when exhaust gases are being discharged from a tail pipe located therein;
b) a clamping element having a clamping arm, the clamping element mounted on the exhaust hose side wall at a position spaced from the hose intake end, the clamping arm extending toward the exhaust hose intake end on the interior of the hose;
c) means defining a receiving mouth between the clamping arm and the interior of the hose side wall for receiving a tail pipe side wall therebetween; and d) means for biasing the clamping arm against the interior wall surface of the hose for clamping a tail pipe side wall therebetween.
a) an exhaust extension hose having an intake end portion adapted to fit loosely over a vehicle tail pipe thereby permitting air to be drawn into the intake end portion when exhaust gases are being discharged from a tail pipe located therein;
b) a clamping element having a clamping arm, the clamping element mounted on the exhaust hose side wall at a position spaced from the hose intake end, the clamping arm extending toward the exhaust hose intake end on the interior of the hose;
c) means defining a receiving mouth between the clamping arm and the interior of the hose side wall for receiving a tail pipe side wall therebetween; and d) means for biasing the clamping arm against the interior wall surface of the hose for clamping a tail pipe side wall therebetween.
8. The quick release assembly according to Claim 7 wherein the clamping element is mounted in an opening in the hose side wall, wherein the clamping element is provided with a handle portion connected to the clamping arm, wherein the handle portion is located on the exterior of the hose and extends outwardly therefrom, and wherein movement of the handle causes the clamping arm to move away from and toward the interior wall of the exhaust hose.
9. The quick release assembly according to Claim 8 wherein the clamping arm is pivotally mounted in the hole in the side wall, wherein the biasing means extends between the handle and the tube side wall, and wherein moving the handle causes the clamping arm to move away from and toward the exhaust hose interior wall surface.
10. The quick release assembly according to Claim 8 including a handgrip located on the exterior of the hose and rigidly secured thereto, wherein the handle and the handgrip are in registration, and wherein squeezing the handle and the handgrip together causes the clamping arm to move away from the interior wall of the exhaust hose.
11. The quick release assembly according to Claim 9 including a handgrip located on the exterior of the hose and rigidly secured thereto, wherein the handle and the handgrip are in registration, and wherein squeezing the handle and the handgrip together causes the clamping arm to move away from the interior of wall of the exhaust hose.
12. The clamp according to Claim 10 wherein the handgrip and the handle are pivotally coupled together at a point spaced from the ends of said handle and handgrip, and wherein the biasing means is a spring mounted between said handle and handgrip for urging said handle and handgrip apart.
13. A clamp for clamping an intake end of a vehicle exhaust extension hose onto a vehicle tail pipe, comprising:
a) a first clamping element having a first clamping arm and a first handle connected adjacent to the clamping arm, wherein the first clamping arm is at a first angle with respect to the first clamping arm;
b) a second clamping element having a second clamping arm and a second handle connected adjacent to the clamping arm, wherein the second clamping arm is at a second angle with respect to the second clamping arm, wherein the second angle is greater than the first angle wherein the handle portions of the clamping elements are pivotally coupled together at a point spaced from the opposed ends of the handles to the clamping arms, wherein the pivotally coupled clamping elements are in registration;
c) a spring mounted between the first and second handles for biasing the handles apart thereby urging the clamping arms together;
d) means for mounting the coupled clamping elements in an opening in the wall of the exhaust hose spaced from the intake end of the exhaust hose with the first clamping arm extending toward the exhaust hose intake end on the interior of the hose, wherein the second clamping arm is rigidly secured to the side wall of the exhaust hose, wherein the handles are located on the exterior of the hose and extend outwardly therefrom, and wherein a receiving mouth is formed substantially between the first clamping arm and the exhaust hose side wall when the handles are squeezed together for receiving the side wall of a tail pipe therebetween; and e) means defining an air intake aperture between the intake end of the exhaust extension hose and the tail pipe then the exhaust hose is clamped onto the tail pipe to cause air to be drawn into the intake aperture when vehicle exhaust is being emitted through the tail pipe.
a) a first clamping element having a first clamping arm and a first handle connected adjacent to the clamping arm, wherein the first clamping arm is at a first angle with respect to the first clamping arm;
b) a second clamping element having a second clamping arm and a second handle connected adjacent to the clamping arm, wherein the second clamping arm is at a second angle with respect to the second clamping arm, wherein the second angle is greater than the first angle wherein the handle portions of the clamping elements are pivotally coupled together at a point spaced from the opposed ends of the handles to the clamping arms, wherein the pivotally coupled clamping elements are in registration;
c) a spring mounted between the first and second handles for biasing the handles apart thereby urging the clamping arms together;
d) means for mounting the coupled clamping elements in an opening in the wall of the exhaust hose spaced from the intake end of the exhaust hose with the first clamping arm extending toward the exhaust hose intake end on the interior of the hose, wherein the second clamping arm is rigidly secured to the side wall of the exhaust hose, wherein the handles are located on the exterior of the hose and extend outwardly therefrom, and wherein a receiving mouth is formed substantially between the first clamping arm and the exhaust hose side wall when the handles are squeezed together for receiving the side wall of a tail pipe therebetween; and e) means defining an air intake aperture between the intake end of the exhaust extension hose and the tail pipe then the exhaust hose is clamped onto the tail pipe to cause air to be drawn into the intake aperture when vehicle exhaust is being emitted through the tail pipe.
14. The clamp according to Claim 13 further comprising an elongate strap rigidly secured transversely to the end of the second clamping arm, wherein the strap is secured around the hose circumference.
15. The clamp according to Claim 13 wherein the second clamping arm is rigidly secured to the exterior side wall of the exhaust hose.
16. The clamp according to Claim 13 wherein the second clamping arm is rigidly secured to the interior side wall of the exhaust hose.
17. The clamp according to Claim 14 wherein the second clamping arm and the elongate strap is rigidly secured to the exterior side wall of the exhaust hose.
18. The clamp according to Claim 14 wherein the second clamping arm and the elongate strap is rigidly secured to the interior side wall of the exhaust hose.
19. A method of making a quick release exhaust extension hose, having an intake end for attachment to a vehicle tail pipe, comprising the steps of:
a) providing an exhaust extension hose having an intake end dimensioned to slide over the vehicle tail pipe and to permit air to be drawn into the intake end around the tail pipe when vehicle exhaust is being emitted through the tail pipe;
b) providing a first clamping element having a first clamping arm portion and a first handle portion connected thereto;
c) forming an opening in the side wall of the exhaust extension hose spaced from the hose intake end for mounting the clamping element therein with the clamping arm portion extending toward the exhaust hose intake end on the interior of the hose and the handle portion located on the exterior of the hose and extending outwardly therefrom, and wherein movement of the handle causes the clamping arm to move away from and toward the interior wall of the exhaust hose for inserting and removing the tail pipe therebetween;
and d) biasing the clamping element so that the clamping arm portion is biased against the inner wall surface of the extension hose for clamping a tail pipe side wall therebetween.
a) providing an exhaust extension hose having an intake end dimensioned to slide over the vehicle tail pipe and to permit air to be drawn into the intake end around the tail pipe when vehicle exhaust is being emitted through the tail pipe;
b) providing a first clamping element having a first clamping arm portion and a first handle portion connected thereto;
c) forming an opening in the side wall of the exhaust extension hose spaced from the hose intake end for mounting the clamping element therein with the clamping arm portion extending toward the exhaust hose intake end on the interior of the hose and the handle portion located on the exterior of the hose and extending outwardly therefrom, and wherein movement of the handle causes the clamping arm to move away from and toward the interior wall of the exhaust hose for inserting and removing the tail pipe therebetween;
and d) biasing the clamping element so that the clamping arm portion is biased against the inner wall surface of the extension hose for clamping a tail pipe side wall therebetween.
20. The method according to Claim 19 further comprising the step of providing a second clamping element having a second clamping arm and a second handle portion attached thereto, rigidly attaching the second clamping arm portion to the side wall of the exhaust extension hose so the first and second clamping elements are in registration, and pivotally coupling the first and second clamping elements together between the clamping arm portions at a point spaced from the ends of the handles.
21. The method according to Claim 20 wherein the second clamping element is mounted with the second clamping arm located on the interior of the tube and rigidly secured against the inner wall of the exhaust tube.
22. The method according to Claim 20 wherein the second clamping element is mounted with the clamping arm located on the exterior of the tube and rigidly secured thereto.
23. The method according to Claim 20, 21 or 22 wherein the first clamping arm is biased toward the inner wall of the extension hose by inserting a spring between the first and second handle portions to urge the handle portions apart.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2038042 CA2038042A1 (en) | 1991-03-12 | 1991-03-12 | Auto exhaust extension |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2038042 CA2038042A1 (en) | 1991-03-12 | 1991-03-12 | Auto exhaust extension |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2038042A1 true CA2038042A1 (en) | 1992-09-13 |
Family
ID=4147170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2038042 Abandoned CA2038042A1 (en) | 1991-03-12 | 1991-03-12 | Auto exhaust extension |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2038042A1 (en) |
-
1991
- 1991-03-12 CA CA 2038042 patent/CA2038042A1/en not_active Abandoned
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| FZDE | Dead |