CA2056725C - Gas flow regulator - Google Patents
Gas flow regulatorInfo
- Publication number
- CA2056725C CA2056725C CA 2056725 CA2056725A CA2056725C CA 2056725 C CA2056725 C CA 2056725C CA 2056725 CA2056725 CA 2056725 CA 2056725 A CA2056725 A CA 2056725A CA 2056725 C CA2056725 C CA 2056725C
- Authority
- CA
- Canada
- Prior art keywords
- gas
- slide member
- gas flow
- flow passage
- flow
- 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.)
- Expired - Fee Related
Links
Landscapes
- Feeding And Controlling Fuel (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
A gas flow modulator has a tubular member forming a gas flow passage extending through the tubular member. A slide member in the gas flow passage is slidable to and fro along the passage and springs within the tubular member an acting in opposite directions on the slide member resiliently bias the slide member towards a predetermined position in the gas passage. A flow constrictor means is fixedly positioned within the gas flow passage for constricting gas flow along the gas flow passage, the slide valve and the flow constrictor means being shaped to decrease the flow of gas along the gas flow passage upon displacement of the slide member in a first direction from the predetermined position by an electromagnetic induction coil extending around the exterior of the tubular member and co-operating with a ferro-magnetic material forming at least part of the slide member or secured thereto.
Description
2 ~ 2 ~
1 lPlCA
TI~LE
S GAS FLOW MODUI~TOR
BACKGROlLJND ~F THE~ INVENTION
Field of the invention.
The present invention relates to gas flow modulators and is useful in particular, but not exclusively, for regll~ting the gas supplies of heating appliances for domestic use and recreational vehicles.
15 Description of Rela~ed Art.
In the design and m~mlf;~cture of gas appliances such as ~lrn~cec, water heaters, fireplaces and the like, it is often desirable to be able to regulate the flow of a gas to a burner in order to achieve certain desired operational parameters,20 for example heat output, output air temperature and/or output water temperature.
In the past, this has sometimes been accomplished by mechanical closed loop syst~ms, employing a sealed capillary tube co~ g a heat-e~n-l~ble fluid which is used to sense the temperature at a predetermin~d location and to 25 generate a control ples~uie, which in turn is used to cause a change of gas flow ; in a specially designed valve.
In the case of demand water heaters, a sirnila~ approach has been used by sensing the ples~ule of input water by means of a diaphragm or other pressure-responsive device an~ generating a control ples~u.e in a ~luid, which in turn is30 applied to a valve designed to adjust a gas flow to a desired value.
The developrn~-nt of electroluc sensors and controllers for regnl~ting gas flow to a burner requires a gas ~ow control ~lnçtion to be effected by the use of olectrical signals, raeher than mel~h~nic~l i.e. pneumatic, signals.
: :
:
' :: ' ; :
2(~7~
SUMMAl~Y OF THlE I~VENTION
According to the present invent;on, there is provided a gas flow modulator which has a tubular member, for example a length of pipe of standard diameter, 5 defining a gas flow passage extending through the tubular member. A slide member is disposed in the gas flow passage and is slidable to and fro along the passage. Spring means, for example a pair of helical compression springs locatedwithin the tubular member and acting in opposite directions on the slide member,resiliently bias the slide member towards a predetermined position in the gas 10 passage.
A flow constrictor means is fixedly positioned within the gas flow passage for constricting gas ~low along the gas flow passage, the slide valve and the flow constrictor means being shaped to decrease the flow of gas along the gas flow passage upon displacement of the slide member in a first direction -from the 15 predetermined position.
For efÇecting this displacement of the slide member from the exterior of the tubular member, there is provided an electromagnetic means in the form of, for example, an in(lnctil)n coil ext~n(ling around the exterior of the tubular member and co-operating with a ferro-magnetic material forming at least part of 20 the slide member or secured thereto.
BRIEF DESCRIP~ION OF THE DRAYVINGS.
Further objects, features and advantages of the present invention will 25 become more readily al)palellL to those skilled in the art from the foll~wingdescription of the invention when taken in conjunction with the accolllpallying drawings, in which:
Figure 1 shows a view in longitlltlin~l cross-section through a gas flow 30 modulator according to one embodiment of the present invention;
~ igure 2 shs)ws a view taken in ~ svel~e cross-section~ along the line II-II
of Figure 1, through the gas flow modulator of Figure l;~Lnd ' . .~ , . ,.~ , . .
2 ~
1 lPlCA
TI~LE
S GAS FLOW MODUI~TOR
BACKGROlLJND ~F THE~ INVENTION
Field of the invention.
The present invention relates to gas flow modulators and is useful in particular, but not exclusively, for regll~ting the gas supplies of heating appliances for domestic use and recreational vehicles.
15 Description of Rela~ed Art.
In the design and m~mlf;~cture of gas appliances such as ~lrn~cec, water heaters, fireplaces and the like, it is often desirable to be able to regulate the flow of a gas to a burner in order to achieve certain desired operational parameters,20 for example heat output, output air temperature and/or output water temperature.
In the past, this has sometimes been accomplished by mechanical closed loop syst~ms, employing a sealed capillary tube co~ g a heat-e~n-l~ble fluid which is used to sense the temperature at a predetermin~d location and to 25 generate a control ples~uie, which in turn is used to cause a change of gas flow ; in a specially designed valve.
In the case of demand water heaters, a sirnila~ approach has been used by sensing the ples~ule of input water by means of a diaphragm or other pressure-responsive device an~ generating a control ples~u.e in a ~luid, which in turn is30 applied to a valve designed to adjust a gas flow to a desired value.
The developrn~-nt of electroluc sensors and controllers for regnl~ting gas flow to a burner requires a gas ~ow control ~lnçtion to be effected by the use of olectrical signals, raeher than mel~h~nic~l i.e. pneumatic, signals.
: :
:
' :: ' ; :
2(~7~
SUMMAl~Y OF THlE I~VENTION
According to the present invent;on, there is provided a gas flow modulator which has a tubular member, for example a length of pipe of standard diameter, 5 defining a gas flow passage extending through the tubular member. A slide member is disposed in the gas flow passage and is slidable to and fro along the passage. Spring means, for example a pair of helical compression springs locatedwithin the tubular member and acting in opposite directions on the slide member,resiliently bias the slide member towards a predetermined position in the gas 10 passage.
A flow constrictor means is fixedly positioned within the gas flow passage for constricting gas ~low along the gas flow passage, the slide valve and the flow constrictor means being shaped to decrease the flow of gas along the gas flow passage upon displacement of the slide member in a first direction -from the 15 predetermined position.
For efÇecting this displacement of the slide member from the exterior of the tubular member, there is provided an electromagnetic means in the form of, for example, an in(lnctil)n coil ext~n(ling around the exterior of the tubular member and co-operating with a ferro-magnetic material forming at least part of 20 the slide member or secured thereto.
BRIEF DESCRIP~ION OF THE DRAYVINGS.
Further objects, features and advantages of the present invention will 25 become more readily al)palellL to those skilled in the art from the foll~wingdescription of the invention when taken in conjunction with the accolllpallying drawings, in which:
Figure 1 shows a view in longitlltlin~l cross-section through a gas flow 30 modulator according to one embodiment of the present invention;
~ igure 2 shs)ws a view taken in ~ svel~e cross-section~ along the line II-II
of Figure 1, through the gas flow modulator of Figure l;~Lnd ' . .~ , . ,.~ , . .
2 ~
Figure 3 shows a view ;n axial end elevation of a flow constrictor member forming part of the gas flow modulator of Figure 1.
DESCRIPTION OF THE PREFERRED PMBODIMENT
s As shvwn in Figure 1 of the accompanying drawings, a gas flow modulator inclicated generally by reference numeral 10 has a cylindrical housing formed bya tubular member 12 in the form of a length of pipe of standard size.
More particularly, the tubular member is of a diameter and thickness 10 compatible with the size of gas ducting (not shown) for which the gas flow modulator 10 is intended, and may be provided at opposite ends w~th male and female threads or fittings (not shown) of the ~pe ~nd size suitable for connection to the above-mentioned gas ducting.
The material selected for the tubular member 12 is non-magnetic and 15 compatible for use with the gas ducting. In the present embodiment of the invention, the tubular member 12 is made of stainless steel, but brass, plastic material or other suitable m~teri~l may ~lternz~tively be used.
The interior of the tubular member 12 forms a gas flow passage 14 which contains a slide member 15 of plastic material. The m~teri~l of the slide member20 15, which may be other than plastic material, and thus for example may be metal, is selected so as to be suitable ~or use in the type of gas intended to be regulated by the gas flow modulator 10.
The slide member 15 is of generally cylindrical shape, with a~ enlarged portion 16 formed near one end of the slide member 14 on the cylindrical surface17 of the slide mem~er. At the same end of the slide member 14, there is formed a cylindrical recess 18, into which is press-fitted a cylintltic~l magnet 2û, which has an end portion 22 projecting from this end of the slide member 14. Instead of being press-fitted in the recess 18, the magnet 20 may alternatively be glued orotherwise securely mounted in this recess.
~he enlarged portion 16 is of generally cylindrical shape, with an outer peripheral cylin~ric:~1 sur~ace in sliding contact with the internal surface of the tubular member 15 for guiding the slide member for axial movement to ~nd fro 2~5~5 along the gas flow passage.
~ he peripheral surface of the enlarged portion 16 is, however, interruptedby eight slots 24, which extend parallel to the axis of the tubular member 12 and the slide member 15 and which are equiallgularly spaced about the peripheral 5 sur~ace of the enlarged portion 16. The slots 24 allow gas to flow along the gas flow passage past the enlarged portion 16.
At opposite sides of the enlarged portion 16, and axially spaced therefrom, a pair of bushings 26 and 28 are press-fitted into the tubular member 12. The bushings 26 and 28 are each formed with an internal step 30 and the enlarged 10 portion 16 is formed, at opposite sides thereof, with a corresponding pair ofexternal steps 32 which are at least a~~ llately complementary to the steps 30.
A pair of helical coll.plession springs 34 extend around the slide member 15 and within the steps 30 and around the steps 32, the springs 34 being seated on ~he bushings 26 and 28 and the enlarged portion 16.
The springs 34 resiliently bias the slide member 15 axially of the tubular member 12 into a predetermined position, in which the slide member 15 is shown in Figure 1, while allowing the slide member 15 to be displaced axially of the tubular member 15 from this predetermined position, as explained below.
At its end opposite from the magnet 20, the cylindrical surface 17 of the slide member 15 is formed with four slots 36, which extend from this emd of the slide member 15 along apploxilllately one quarter of the le.ngth of the slide member 15. The slots 36, in co-opera$ion with the bushing 26, determine the gas flow along the gas flow passage 14, as described in greater detail below, and thus the length, cross-sectional size and number of the slots 36 determine the performance parameters s)f the gas modulator 10.
Beyond the slots 36, four ~ 1ition~1 slots 38, which are likewise formed in the cylin-lriç~l surface 17 but which are substantially shallower thall the slots 34, extend along the cylint1ric~1 surface 17 for a short ~ tzlncç, in ~ligTIment with the slots 36.
At the exterior of the tubular member 12, an induction coil 40 extends around the tubular member 12 between a pair of almular baffles 42. The induction coil 40 co-operates w~th the magnet 20 to effect the displ~c~oment. of the ' .. ' ~ - .
~,3~ ~,'7 slide member 15 along the gas flow passage 14 In use, the gas flow modulator 1() is connected between a demand gas regulator and the orifice of a burner. At this location, the gas flow modulator 10 receives gas at a pressure established by the demand regulator and, by applying S a suitable current to the induction coil 40, the slide member 15 can be axially so as to provide a variable obstruction to the flow of the gas, thus reducing the demand regulator output and the driving pressure of the burner orifice with consequential reduction of the heat output of the burner.
More particularly, the flow of gas is controlled by the position of the slide 10 member 15 relative to the bushing and, thus, by the passage available between ~he slide member 15 and the bush;ng 26 through which the gas can pass.
When the slide member 15 is displaced to the left, as viewed in Figure 1, from its normal predetermined or rest position, in which it is shown in Figure 1, to such an extent that the axial portion of the cylindrical surface uninterrupted by 15 the slots 36 and 38 has been moved into the bushing 26 past the shoulder 30 thereof, then only a small amount of gas can ~~ow through a small clearance which exists between the cylindrical surface 17 and inner c~lindrical surface 27 of the bushing 26.
In the position of the slide member 15 shown in Figure 1, a greater 20 amount of the gas can flow through the slots 38.
When the slide member 15 is displaced so that the slots 36 extend to the right, as viewed in Figure 1, past the shoulder 30 of the bushing 26, then a still greater amount of gas can flow past the bwshing 26.
The amount of the gas which thus flows through the slots 38 and 36 25 depends not only on the cross-sectional area of these slots but also, to at least some extent, on the length of the slots which extends past the shoulder 30 of the bushing 26, so that the gas fl~w is not varied in an abrupt step-wise manner during the above-described displacement of the slide member.
If desired, the cross-sectional areas of the slots 36 and 38 c~ be varied 30 along the length thereof in order to produce a corresponding variation of the rate of gas flow during the above-slescribed displacement of the slide member 15.
The mo~hll~tinp action is produced by applying an appropriate current to ' the induction coil, which results in a movement of the slide member 151 which inturn allows more or less gas to pass through the slots 36 of the slide member lS.
The mslgnitucle of the current supplied to the induction coil 40 may be controlled by sensing the output of the burner. Thus, for example, in the case of S a water heater, the temperature of the water heated by the heater can be sensed to provide a signal controlling the energization of the induction coil 40.
The size of the openings through which the gas can flow between the bushing 26 and the slide member lS is determined by the dimensions of the slots 38 and the axial position of the slide mernber lS relative to the bushing 26.
10 A ~ lllll flow can always be assured by allowing gas to escape even in the position of greatest flow obstruction.
As will be apparent to those skilled in the art~ various modifications of the present invention may be made within the scope of the invention as defined in the appended claims.
.
.
.. - .
DESCRIPTION OF THE PREFERRED PMBODIMENT
s As shvwn in Figure 1 of the accompanying drawings, a gas flow modulator inclicated generally by reference numeral 10 has a cylindrical housing formed bya tubular member 12 in the form of a length of pipe of standard size.
More particularly, the tubular member is of a diameter and thickness 10 compatible with the size of gas ducting (not shown) for which the gas flow modulator 10 is intended, and may be provided at opposite ends w~th male and female threads or fittings (not shown) of the ~pe ~nd size suitable for connection to the above-mentioned gas ducting.
The material selected for the tubular member 12 is non-magnetic and 15 compatible for use with the gas ducting. In the present embodiment of the invention, the tubular member 12 is made of stainless steel, but brass, plastic material or other suitable m~teri~l may ~lternz~tively be used.
The interior of the tubular member 12 forms a gas flow passage 14 which contains a slide member 15 of plastic material. The m~teri~l of the slide member20 15, which may be other than plastic material, and thus for example may be metal, is selected so as to be suitable ~or use in the type of gas intended to be regulated by the gas flow modulator 10.
The slide member 15 is of generally cylindrical shape, with a~ enlarged portion 16 formed near one end of the slide member 14 on the cylindrical surface17 of the slide mem~er. At the same end of the slide member 14, there is formed a cylindrical recess 18, into which is press-fitted a cylintltic~l magnet 2û, which has an end portion 22 projecting from this end of the slide member 14. Instead of being press-fitted in the recess 18, the magnet 20 may alternatively be glued orotherwise securely mounted in this recess.
~he enlarged portion 16 is of generally cylindrical shape, with an outer peripheral cylin~ric:~1 sur~ace in sliding contact with the internal surface of the tubular member 15 for guiding the slide member for axial movement to ~nd fro 2~5~5 along the gas flow passage.
~ he peripheral surface of the enlarged portion 16 is, however, interruptedby eight slots 24, which extend parallel to the axis of the tubular member 12 and the slide member 15 and which are equiallgularly spaced about the peripheral 5 sur~ace of the enlarged portion 16. The slots 24 allow gas to flow along the gas flow passage past the enlarged portion 16.
At opposite sides of the enlarged portion 16, and axially spaced therefrom, a pair of bushings 26 and 28 are press-fitted into the tubular member 12. The bushings 26 and 28 are each formed with an internal step 30 and the enlarged 10 portion 16 is formed, at opposite sides thereof, with a corresponding pair ofexternal steps 32 which are at least a~~ llately complementary to the steps 30.
A pair of helical coll.plession springs 34 extend around the slide member 15 and within the steps 30 and around the steps 32, the springs 34 being seated on ~he bushings 26 and 28 and the enlarged portion 16.
The springs 34 resiliently bias the slide member 15 axially of the tubular member 12 into a predetermined position, in which the slide member 15 is shown in Figure 1, while allowing the slide member 15 to be displaced axially of the tubular member 15 from this predetermined position, as explained below.
At its end opposite from the magnet 20, the cylindrical surface 17 of the slide member 15 is formed with four slots 36, which extend from this emd of the slide member 15 along apploxilllately one quarter of the le.ngth of the slide member 15. The slots 36, in co-opera$ion with the bushing 26, determine the gas flow along the gas flow passage 14, as described in greater detail below, and thus the length, cross-sectional size and number of the slots 36 determine the performance parameters s)f the gas modulator 10.
Beyond the slots 36, four ~ 1ition~1 slots 38, which are likewise formed in the cylin-lriç~l surface 17 but which are substantially shallower thall the slots 34, extend along the cylint1ric~1 surface 17 for a short ~ tzlncç, in ~ligTIment with the slots 36.
At the exterior of the tubular member 12, an induction coil 40 extends around the tubular member 12 between a pair of almular baffles 42. The induction coil 40 co-operates w~th the magnet 20 to effect the displ~c~oment. of the ' .. ' ~ - .
~,3~ ~,'7 slide member 15 along the gas flow passage 14 In use, the gas flow modulator 1() is connected between a demand gas regulator and the orifice of a burner. At this location, the gas flow modulator 10 receives gas at a pressure established by the demand regulator and, by applying S a suitable current to the induction coil 40, the slide member 15 can be axially so as to provide a variable obstruction to the flow of the gas, thus reducing the demand regulator output and the driving pressure of the burner orifice with consequential reduction of the heat output of the burner.
More particularly, the flow of gas is controlled by the position of the slide 10 member 15 relative to the bushing and, thus, by the passage available between ~he slide member 15 and the bush;ng 26 through which the gas can pass.
When the slide member 15 is displaced to the left, as viewed in Figure 1, from its normal predetermined or rest position, in which it is shown in Figure 1, to such an extent that the axial portion of the cylindrical surface uninterrupted by 15 the slots 36 and 38 has been moved into the bushing 26 past the shoulder 30 thereof, then only a small amount of gas can ~~ow through a small clearance which exists between the cylindrical surface 17 and inner c~lindrical surface 27 of the bushing 26.
In the position of the slide member 15 shown in Figure 1, a greater 20 amount of the gas can flow through the slots 38.
When the slide member 15 is displaced so that the slots 36 extend to the right, as viewed in Figure 1, past the shoulder 30 of the bushing 26, then a still greater amount of gas can flow past the bwshing 26.
The amount of the gas which thus flows through the slots 38 and 36 25 depends not only on the cross-sectional area of these slots but also, to at least some extent, on the length of the slots which extends past the shoulder 30 of the bushing 26, so that the gas fl~w is not varied in an abrupt step-wise manner during the above-described displacement of the slide member.
If desired, the cross-sectional areas of the slots 36 and 38 c~ be varied 30 along the length thereof in order to produce a corresponding variation of the rate of gas flow during the above-slescribed displacement of the slide member 15.
The mo~hll~tinp action is produced by applying an appropriate current to ' the induction coil, which results in a movement of the slide member 151 which inturn allows more or less gas to pass through the slots 36 of the slide member lS.
The mslgnitucle of the current supplied to the induction coil 40 may be controlled by sensing the output of the burner. Thus, for example, in the case of S a water heater, the temperature of the water heated by the heater can be sensed to provide a signal controlling the energization of the induction coil 40.
The size of the openings through which the gas can flow between the bushing 26 and the slide member lS is determined by the dimensions of the slots 38 and the axial position of the slide mernber lS relative to the bushing 26.
10 A ~ lllll flow can always be assured by allowing gas to escape even in the position of greatest flow obstruction.
As will be apparent to those skilled in the art~ various modifications of the present invention may be made within the scope of the invention as defined in the appended claims.
.
.
.. - .
Claims (7)
1. A controlled flow gas heating system comprising:
a source of combustible gas;
a gas flow modulator receiving a flow of gas from said source of combustible gas and comprising:
a tubular member having an interior surface defining a gas flow passage extending through the tubular member;
a slide member disposed in the gas flow passage and having an exterior surface with a plurality of ridges projecting therefrom, said plurality of ridges being axially slidable along the interior surface of the gas flow passage and separating the exterior surface of the slide member from contact with the interior surface of the tubular member;
means for biasing said slide member towards a predetermined position in the gas flow passage and comprising a pair of compression springs within said tubular member seated on opposite sides of said plurality of ridges, said compression springs acting in opposite directions on said slide member;
flow constrictor means, fixedly positioned within and extending from the interior surface of the gas flow passage, for constricting gas flow along the gas flow passage and comprising one of a pair of annular inserts in said tubular member, said exterior surface of said slide member having slots formed therein and extending slidably through said one of said pair of annular inserts to control gas flow along said gas flow passage in dependence on the position of said slots relative to said one of said pair of annular inserts, said compression springs being seated on respective ones of said pair of annular inserts;
said slide member and said flow constrictor means being shaped to adjust the flow of gas along the gas flow passage upon displacement of said slide member in a first direction from the predetermined position; and electromagnetic means for effecting the displacement of said slide member from the exterior of the tubular member;
a power source in electrical communication with and for providing power to said electromagnetic means;
a burner orifice receiving an output of said combustible gas from said gas flow passage.
a source of combustible gas;
a gas flow modulator receiving a flow of gas from said source of combustible gas and comprising:
a tubular member having an interior surface defining a gas flow passage extending through the tubular member;
a slide member disposed in the gas flow passage and having an exterior surface with a plurality of ridges projecting therefrom, said plurality of ridges being axially slidable along the interior surface of the gas flow passage and separating the exterior surface of the slide member from contact with the interior surface of the tubular member;
means for biasing said slide member towards a predetermined position in the gas flow passage and comprising a pair of compression springs within said tubular member seated on opposite sides of said plurality of ridges, said compression springs acting in opposite directions on said slide member;
flow constrictor means, fixedly positioned within and extending from the interior surface of the gas flow passage, for constricting gas flow along the gas flow passage and comprising one of a pair of annular inserts in said tubular member, said exterior surface of said slide member having slots formed therein and extending slidably through said one of said pair of annular inserts to control gas flow along said gas flow passage in dependence on the position of said slots relative to said one of said pair of annular inserts, said compression springs being seated on respective ones of said pair of annular inserts;
said slide member and said flow constrictor means being shaped to adjust the flow of gas along the gas flow passage upon displacement of said slide member in a first direction from the predetermined position; and electromagnetic means for effecting the displacement of said slide member from the exterior of the tubular member;
a power source in electrical communication with and for providing power to said electromagnetic means;
a burner orifice receiving an output of said combustible gas from said gas flow passage.
2. The controlled flow gas heating system as defined in claim 1, further comprising:
controller in electrical communication with said power source; and a containing means having a medium therein, both said containing means and said medium being heated by combustion of said combustible gas at said burner orifice, said medium having therein a temperature sensing means in communication with said power source for sensing the temperature of said medium and for outputting a signal to said controller by which said controller controls the power output by said power source to said electro-magnetic means, whereby the flow of combustible gas through said gas flow modulator to said burner is a function of the temperature at said medium.
controller in electrical communication with said power source; and a containing means having a medium therein, both said containing means and said medium being heated by combustion of said combustible gas at said burner orifice, said medium having therein a temperature sensing means in communication with said power source for sensing the temperature of said medium and for outputting a signal to said controller by which said controller controls the power output by said power source to said electro-magnetic means, whereby the flow of combustible gas through said gas flow modulator to said burner is a function of the temperature at said medium.
3. The controlled flow gas heating system as defined in claim 1, wherein said slide member and said flow constrictor means are shaped to decrease the flow of said gas along the gas flow passage upon displacement of said slide member in said first direction from the predetermined position.
4. The controlled flow gas heating system as defined in claim 1, wherein said slide member and said flow constrictor means are shaped such that said predetermined position of said slide member within said gas flow passage substantially decreases the flow of gas along the gas flow passage, and such that upon displacement of said slide member in said first direction from the predetermined position the flow of gas is increased along the gas flow passage.
5. The controlled flow gas heating system as defined in claim 1, wherein said electromagnetic means comprises an induction - Page 2 of Claims -coil extending around said tubular member and co-operating with magnetic material forming at least part of said slide member.
6. The controlled flow gas heating system as defined in claim 1, further comprising:
a rectifier means for rectifying an electrical power signal sent from said power source to said electromagnetic means, said rectifier means being in electrical communication between said electrical power source and the electromagnetic means, whereby the slide member vibrates within the gas flow passage.
a rectifier means for rectifying an electrical power signal sent from said power source to said electromagnetic means, said rectifier means being in electrical communication between said electrical power source and the electromagnetic means, whereby the slide member vibrates within the gas flow passage.
7. The controlled flow gas heating system as defined in claim 1, further comprising:
a digital controller means for digitally modulating to a desired frequency an electrical power signal that sent from said power source to said electromagnetic means, said digital controller means being in electrical communication between said electrical power source and the, electromagnetic means, whereby the slide member vibrates within the gas flow passage.
a digital controller means for digitally modulating to a desired frequency an electrical power signal that sent from said power source to said electromagnetic means, said digital controller means being in electrical communication between said electrical power source and the, electromagnetic means, whereby the slide member vibrates within the gas flow passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2056725 CA2056725C (en) | 1991-11-29 | 1991-11-29 | Gas flow regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2056725 CA2056725C (en) | 1991-11-29 | 1991-11-29 | Gas flow regulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2056725A1 CA2056725A1 (en) | 1993-05-30 |
| CA2056725C true CA2056725C (en) | 1997-09-09 |
Family
ID=4148845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2056725 Expired - Fee Related CA2056725C (en) | 1991-11-29 | 1991-11-29 | Gas flow regulator |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2056725C (en) |
-
1991
- 1991-11-29 CA CA 2056725 patent/CA2056725C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2056725A1 (en) | 1993-05-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1186816B1 (en) | Solenoid valve | |
| EP0467128B1 (en) | Electromagnetic solenoid valve with variable force motor | |
| CA2142659C (en) | Electrically modulated pressure regulator valve with variable force solenoid | |
| US5261637A (en) | Electrical variable orifice actuator | |
| US4947893A (en) | Variable force solenoid pressure regulator for electronic transmission controller | |
| US4463332A (en) | Adjustable, rectilinear motion proportional solenoid | |
| US5000420A (en) | Electromagnetic solenoid valve with variable force motor | |
| US3880476A (en) | Electromagnetic valve | |
| EP0989345B1 (en) | Single stage variable force solenoid pressure regulating valve | |
| CA2251231A1 (en) | Proportional variable force solenoid control valve with armature damping | |
| US5348224A (en) | Gas flow modulator | |
| JP2000193125A (en) | Solenoid pressure control valve having magnetic flux branch passage | |
| US4863142A (en) | Electromagnetic solenoid valve with variable force motor | |
| US4553732A (en) | Solenoid controlled flow valve | |
| JP4463527B2 (en) | Proportional pressure regulating valve for regulation of hydraulic circuit pressure level | |
| EP0481184B1 (en) | Electromagnetically operated fluid control valve | |
| US20010018927A1 (en) | Mass flow controller and method of operation of mass flow controller | |
| EP0503357A1 (en) | Flow regulating valve | |
| CA2056725C (en) | Gas flow regulator | |
| GB2103390A (en) | Hydraulic system with proportional electrical control | |
| US4157168A (en) | Electromagnetically operated valve structure | |
| EP0385286B1 (en) | Variable force solenoid pressure regulator for electronic transmission controller | |
| EP0077599A1 (en) | Proportional solenoid valve | |
| CN109519549B (en) | Electromagnetic gas valve, gas regulating valve and gas cooking appliance | |
| JPH0369875A (en) | Solenoid valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |