US2270014A - Body jack attachment - Google Patents

Description

Jan. 13, 1942. ca. M. WALRAVEN 2,270,014

BODY JACK ATTACHMENT Filed. Aug. 4, 1939 2 She ets-Sheet 1 INVENTOR GEORGE M. w RAVEN.

' ATTORN Jan. 13, 1942.

G. M. WALRAVEN BODY JACK ATTACHMENT 2 Sheets-Sheet '2 Filed Aug. 4, 1939 .6 m w i 6 l I O m H 4 (\l \7 5 7 III I I. |\O|| W 4 m I 7 3 I l 8 n w Wlv m fill INVENTOR.

GE RGE M.W RAVEN.

BY a

2 ATTORNEY.

Patented Jan. 13, 1942 i'iE snares AT-:iN-T orr es BODY JACK ATTACHlW'EN T Qeorg'e M. Walraven, Kenosha, Wis, assign'or to Snap-On Tools Corporation, Kenosha Wis.

This invention relates to mechanical jacks and more particularly to attachments for automobile body jacks, although certain features thereof may be employed with equal advantage for other purposes.

It contemplates more especially the provision of an adjustable work engaging attachment for a 'body jack to render the jack more effectively applicable for sustaining; reinforcing and straightening angular irregularities of an auto body resulting through accident or impact.

One object of the present invention is to simplify the construction and improve the operation of devices of the character mentioned.

Another object is to provide an improved body jack attachment of simple and compact construction that will operate with minimum wear and effort in the use thereof.

Still another object is to provide a rotatable end attachment for a body jack that is of durable and rugged construction to operate with minimum wear and effort.

A further object is to provide asimple and improved rotatably mounted'end attachment for a body jack capable of being securely locked at any desired angle for operation without any appreciable wear on the acting elements.

A still further object is to provide improved means for maintaining a rotatable attachment for'a body jack at any desired angle in the plane of said body jack.

Still a further object is to provide a simple, rugged locking means for a rotatable end attachment' for a body jack.

Other objects and advantages will appear from the following description of an illustrative embodiment of the present invention.

In'the drawings:

Figure 1 is a front view in elevation of a body jack showing the assembled spoon'attachment embodying features of thepresent invention.

Figure 2 is a sectional view of the spoon attachment taken substantially along lines IIII of Figure 1.

Figure 3 is a fragmentary sectional View of the body jack spoon attachment taken substantially along line 1II-l1I of Figure 2.

Figure 4 is a front view in elevation of a modified embodiment of the body jack attachment.

Figure 5 is a top plan view of Figure 4.

Figure 6 is a sectional view taken substantially along line V'IVI of Figure 5.

Figure 7 is a side View in elevation of the axial pin shown in'Figure 6 with parts thereof being broken away to clarify the showing;

23 and pawl 24 retained therebetween.

vThe structure selected for illustration comprises an elongated. tubular cylindrical member lil'that telescopically receives a screw'member l I that is fr'e'ely'disposed therein and has an external :diameter somewhat smaller than that of the internal diameter of the tubular sleeve It to permit longitudinal movement without any lateral play or displacement. Consequently, the screw member I I will be freely displaceable within the tubular sleeve H] which precludes any lateral movement therebetween to act as a guide therefor. The tubular'sleeve It has an open extremity |2fto internally receive a correspondingly shaped adaptor l3 having a flanged periphery M which engages the open extremity l2, and an extension I5 projecting therefrom to receive work engaging member l6.

.Inorderj to preclude accidental removal between thework engaging member 16 and the adaptor shank IS, the latter is provided with radially disposed spring impelled detents H which cooperate with correspondingly shaped depressions I8 provided in the cylindrical bore IQ of the shank 20 integrally formedwith work engaging member l6. As shown, work engaging member I6 comprises a cast, forged or otherwise shapedbody which is bifurcated along a longitudinal median line to present a substantially rectangular aperture 2| to define spaced furcations22for the reception of a revoluble member The revoluble member '23 comprises a substantially circular ratchet member wheel 25 terminating in an arcuately shaped spoon-shaped projection 26 integrally formed therewith for longitudinal and lateral projection'beyond the head end 2'! of work engaging member I6. In order to retain revoluble member 23 for journalled rotation within body chamber 22, a stub shaft 28 is pressed into axial bore 29 provided in the revoluble member 23. The stubshaft 28 is journalled in axially aligned bores 30 and 3|, provided in the furcations 22 for communication with the interior thereof.

It should be noted that aligned bores 3t3l are concentric with and adjacent to the head end 21 of bifurcated body I6 so that when stub shaft 32 and 33 will extend somewhat beyond the external wall surfaces of work engaging member I6. Split rings 34 and"..35 are respectively re.-

ceived in annular grooves 36 and 31 provided in the stub shaft extremities, thus precluding any substantial lateral movement of stub shaft 28 relative to work engaging member (6. The stub shaft 28 is of a high quality alloy steel that is hardened to sustain unusually heavy loads for extended periods without appreciable wear thereon.

In order to fixedly retain spoon-shaped projection 26 in the desired angular position relative to work engaging member Hi, the periphery of ratchet wheel is provided with radially extending ratchet teeth 38 cut or otherwise formed for extension therefrom. As shown, ratchet wheel 25 engages a correspondingly shaped circular pawl 24 longitudinally aligned therewith. Pawl 24 is received within chamber 22 ahead of ratchet wheel 25 and journalled for rotation in a manner similar to ratchet member 25. To this end, a cylindrical stub-shaft 39, having a smaller diameter than similar shaft 28, is pressed into axial bore 46 provided in pawl 24 and journalled in axially aligned bores 41 and 42 of furcations 22, in turn, longitudinally aligned with bores 39--3I. The projecting shaft extremities 43 and 44 are provided with annular grooves 45 and 46, respectively, to receive split rings 41 and 48 serving as stops in precluding lateral movement of shaft 39 relative to work en- The pawl teeth 49 and 50 are sufficiently spaced so that one or the other will be in operative engagement with a ratchet tooth 38 to enable the desired angular positioning of spoon 26 without interference with the inactive pawl tooth. During the ratcheting action, the pawl 24 partially rotates about its axis until the next successive ratchet tooth 38 is engaged by the active pawl tooth 49 or 59 depending upon the direction of the ratcheting action. Rotary adjustment of pawl 24 is effected by means of finger manipulating buttons 5| and 52 anchored in the periphery of pawl 24, each one being positioned an equal distance back of the pawl teeth 49-50 so as to be substantially diametrically opposed to each other.

To maintain the pawl 24 stationary and in adjusted positions for. the desired directional ratcheting, a positioning ball or detent 53 is resiliently mounted on a spring 54 confined in a passage 55 provided longitudinally in the body 2| for radial communication with the pawl receiving recess 22. The spring 54 urges the positioning ball 53 in the direction of the pawl 24 for engagement with the periphery thereof. To this end, the periphery of pawl 24 is provided with conical cavities 56 and 51 for reception of the resiliently mounted positioning ball or detent 53. The cavities 56 and 51 are spaced for se lective registry with the detent 53 to hold the pawl teeth 49 and 56, respectively, in meshing engagement with the teeth 38 of ratchet member 25, thereby enabling its rotation in a counterclockwise and clockwise direction (viewed from Figure 3) responsive to ratcheting or manipulating the spoon 26.

These teeth are complemental to the With the arrangement of parts above described, the spoon-shaped projection 26 may be rotated to the desired angular position in order to substantially correspond to the contour of indentation or irregularity in an auto body, then placed against that particular portion of the auto body to serve as an anvil in pounding out the irregularities due to impact or accident. Then, too, it may be more advantageous, in some instances, to straighten out the auto body irregularity by engaging the arouately curved projection 26 thereover and manipulating the body jack to realign the damaged portion of the body. When the work engaging member i6 is used in this manner, fixed retention thereof in the adaptor shank l5 may be optionally effected in addition to or instead of the spring detent connection therebetween, by the provision of any suitable coupling means of the general type shown in the Downs Patent No. 1,018,172, February 20, 1912.

As a result, the work engaging projection 26 can be utilized for two-way deforming operations to bring a surface back to its initial contour with the urge exerted by the displaceable jack members l8ll responsive to a ratcheting member, to be more fully described hereinafter. During either of these operations, the ratchet and pawl mechanism retains the spoon-shaped projection 26 in its fixed angular position and a change in position can only be effected by releasing the force exerted by the body jack and then manipulating the finger buttons 5l-52 to reverse the pawl 24 and disengage ratchet member 26.

As shown in Figure 3, the engagement of pawl tooth 56 with one of the ratchet teeth 38 precludes the displacement of spoon-shaped member 26 in a counterclockwise direction. Ratchet wheel 25 is released from engagement with pawl 24 by rotating projection 26 in a clockwise direction. Further rotation in the clockwise direction is prevented by rotating pawl 24 in a counterclockwise direction through the finger manipulating buttons 5l-52 until pawl tooth 49 engages a corresponding ratchet tooth 38.

The end of the tubular sleeve ID opposite the work engaging end attachment telescopically terminates in a cylindrical reinforcing body 58 to which a knurled handle rod 59 may be connected. The extremity of knurled rod 59 (not shown) will frictionally engage the sleeve to effect tight connection between tubular sleeve 10 and its reinforcing body 58 so as to constitute a single element. A set screw 69 may be projected through reinforcing body 58 to engage the sleeve Ill and cooperate with the rod handle 59 in effecting a fixed connection between the sleeve l9 and its reinforcing body 58. Another set screw 6| projected through reinforcing body 58 engages screw member I I so as to preclude relative rotation thereof with the sleeve In which are, however, axially displaceable relative to each other.

In order to displace the tubular sleeve I6 and screw member H inwardly or outwardly relative to each other, an improved ratcheting device 62 is provided in screw meshing engagement with screw member H. Ratcheting device 62 and the complemental structural expedients which form cooperative members of the assembled body jack constitute no part of the present invention and are more fully described and set forth in co-pending patent application Serial No. 224,835.

filed August 13, 1938Qpatented Aug. '20, 1940 as Patent'2,212,090.

Screw member! I terminates in tubular adaptor body 63 for detachable association therewith. Adaptor body 63 is interposed between screw member H and a suitable end bumper '64 and is connected toend bumper 64 in a similar manner to that described in connection with adaptor body I3 and the work engaging member I6. To

this end, the bumper head 84 is of resilient material such as ebonite which is molded or otherwise shapedaround ametallic base 65. Various other types-f bumper heads may be used depending on the requirements of any particular work or which maybe differed within a wide range in connection with the body jack utilized to sustain indentations and irregularities resulting through accident and impact.

The modified embodiment of'the body jack attachment constituting the present invention as illustrated in Figures 4 to 7 inclusive, comprises in this instance, a work engaging member l6 having a cast, forged or :otherwise shaped body of substantially'circular configuration, terminating in a cylindrical shank 6B. Shank 86 is provided with a cylindrical bore 61 formed with radially disposed internal depressions 68 to cooperate with correspondingly shaped spring impelled detents I1 on adaptor shank-i5 (Figure 1). As shown, work engaging member I6 is bifurcated along a longitudinal median line to present a substantially rectangular aperture 69 defining spaced furcations 18 for the reception of a revoluble member 1 I.

Revoluble member 1| comprises a substantially circular plate 12 terminating in an arcuately shaped projecting member 13 integrally formed therewith for longitudinal and lateral projection .beyond the head end 14 of body l6. It should be noted that disc member 12 is retained for partial rotation within the confines of body aperture 69 while arcuately shaped member 13 integrally formed with disc member 12 proiects. outwardly therefrom for rotation therewith. The retention and free rotation of revoluble member 1| within aperture 69 is accomplished by the provision of a pin 15 projected axially through the bore 18 located in disc member 12' so as to be concentric therewith. In turn, pin 15 is journalled in axially aligned bores 11 and 18 provided in the vertical wall surfaces of furcations 18 for communication with the interior thereof. Thus, pin 15 extends through axially aligned bores 16-11-18 so as to serve as a retaining member and fulcrum about which revoluble member 1! is freely rotated. i

In order that revoluble member 1| may be rotated to any desired angular position within a wide circular range limited only by the abutment of arcuately shaped member 13 with the opposite end surfaces 19 and 80 of body member IS, a plurality of indexing holes 8! are provided in the confronting furcations of bifurcated body member I6. These indexing holes 8|, in this instance four in number, are circumferentially spaced at predetermined angular positions intermediate the substantially circular periphery of furcations 16 and axially aligned center bores 11-18 so as to be radially equi-distant from the center bores.

When the work engaging member I8 is in assembled relation, adjustable rotary positioning of arcuately shaped member 13 is obtained by selective registry of one of the indexing holes 8| with one of a plurality of corresponding holes 82, of

equaldiam'eter, similarly'provided in disc 12. Indexing holes 82,.in this instance eight in number, are equally spaced intermediate the circular periphery of disc 12and axial bore 18 so that the equi-distant centers of said indexing holes are theLsame distance from the center of axial bore 16 as indexing holes 8| are from aligned center bores 11-18.

With the ,two series of indexing holes 81 and 82 arranged as described supra, the spoon-shaped member 13 may be angularly adjusted to any one of eight successive positions approximately Il apart. Tothis end, indexing holes 82 are evenly spaced at 45 intervals so as to effectregistry with one of corresponding indexing holes 8! in furcations 18. As shown in Figures 4 and 6, the initial position of spoon-shaped member 13 is obtained byregistry between thelower left hand indexing holes 8| of housing I6 and the corresponding indexing hole 82 of revoluble member 11 so that elongated cylindrical pin 83 may be inserted and journalled in the aligned holes 8 i -82 for fixedly retaining spoon-shaped member 13 in the desired position.

By withdrawing pin 83, spoon-shaped member 13 may be rotated to any other angular position such as shown in Figure 1 in broken lines, whereby registry will be effected between indexing holes Sl and the corresponding hole 82 of revoluble member 11. When the desired position has been obtained by rotation of spoon-shaped member 13 in either clockwise or counterclockwise directions (viewed from Figure 4) and the corresponding registry has been effected between indexing holes 8| and 82, pin 83 is again reinserted for retention of the predetermined angularity.

It is worthy of note that the particular arrangement of indexing holes illustrated in the accompanying drawings should be construed as illustrative rather than a limitation, since many other equally desirable correlative series of predetermined indexing hole positions will be readily apparent to those skilled in the art. In the instant showing, indexing hole Bl (Figure 4) is offset 1124K in the clockwise direction from the longitudinal median line selected, for convenience, as the reference line. Indexing hole 81 is offset 22 /2 from the reference line in the counterclockwise direction. Indexing hole 8| is offset 33% from the same line in the clockwise direction and hole Bl shown in registry with corresponding hole 82*, is offset 45" from the reference line in the counterclockwise direction.

It is apparent, therefore, that rotation of spoon-shaped member 13 in a counterclockwise direction from the initial position shown in Figures 4 and 6 will effect registry of the indexing holes 8| following in clockwisesuccession and a reversal of rotation results in successive registry of indexing holes 8| 8I, and 81 in the counterclockwise order named. It should also be pointed out that axial pin 15 and position pin 83, extend somewhat beyond the external surfaces of confronting furcations 10 when the work engaging member l6 is in its completely assembled relation (see Figure 5).

In order to preclude accidental displacement of these pins 15-83 from their journalled confinement in housing It, spring impelled detents 84 are each provided proximate to the opposite extremities of the pins for abutment against the external wall surfaces of confronting furcations 18. To this end, pins 15 and 83 are each provided with a pair of oppositely disposed recesses 85 for confinement of a pair of springs 86 to serve as resilient support for detents 84. The detents 84, in this instance of spherical'configuration, are retained within recesses 85 against accidental removal therefrom by swaging the open peripheral edges of said recesses so as to slightly diminish the diameters thereof and effectively confine the detent balls 84 therein. The pins IS-83 are inserted through the aligned bores 'IBTl-'l8 and indexing holes 81-82 by forcibly depressing the detents 84 during the movement therethrough. High quality alloy steel that is hardened to sustain unusually heavy loads for extended periods without appreciable wear thereon is the material which is preferable though not essential for use in the pins 15-83.

With the teachings of the present invention, an improved body jack end attachment is provided which may be instantly adjusted to various angles depending on the work requirements thereof. Additionally, the simple arrangement of a minimum number of parts in the assembled unit affords the rapid interchange of different lengths or types of spoons in the same housing and the replacement of worn parts with a minimum time and labor requirement.

Various changes may be made in the embodiment of the invention herein specifically defined without departing from the invention or sacrificing any features or advantages thereof, and. nothing herein shall be construed as limitations of the invention, its concept or structural embodiment as to the whole or any part thereof except as defined in the appended claims.

I claim:

1. In a portable jack, the combination with longitudinally displaceable members, of means for causing the relative displacement of said members, work engaging means detachably associated with the ends of said members, one of said.

work engaging means including an angularly adjustable ratchet wheel, and means including a ratchet pawl for retaining said work engaging means in its selected adjustable position to carry a load.

In a portable jack, the combination with longitudinally displaceable members, of means for causing the relative displacement of said members, work engaging means detachably associated with the ends of said members, one of said work engaging means including an angularly adjustable ratchet wheel, and means including a ratchet pawl for retaining said work engaging means in its selected adjustable position to carry a load.

3. In a portable jack, the combination with longitudinally displaceable members, of means for causing the relative displacement of said members, work engaging means detachably associated with the ends of said members, one of said work engaging means including an angularly adjustable element, means including a revoluble ratchet wheel and a pawl for retaining said work engaging means in its selected adjustable position to carry a load, and means on said pawl for eifecting the reversal thereof to afford opposite support of said ratchet wheel.

4. In a portable jack, the combination with longitudinally displaceable members, of means for causing the relative displacement of said members, work engaging means detachably associated with the ends of said members, one of said work engaging means including an angularly adjustable element, and means including an axially mounted ratchet wheel formed integral with said element, and a reversible pawl engaging said ratchet wheel for retaining said work engaging means in its selected adjustable position to carry a load.

5. In a portable jack, the combination with longitudinally displaceable members, of means for causing the relative displacement of said members, and work engaging means detachably associated with the ends of said members, one of said Work engaging means including confronting intermeshing toothed elements, one of said elements having an angularly adjustable work engaging toe projecting therefrom and means for enabling the adjustment of one of said toothed elements relative to the other of said toothed elements to permit their relative rotatable displacement in a plurality of angular load carrying positions.

GEORGE M. WALRAVEN.

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