US2376375A - Muffler jack - Google Patents

Description

May 22, 1945. J, J M|ZER 2,376,375

MUFFLER JACK Filed Aug. 18, 1941 2 Sheets-Sheet 2 INVENTOJR ATTORNEYS.

Patented May 22, 1945 UNITED STATE s PATENT OFFICE MUFFLER JACK Joseph J. Mizer, Racine, Wis., assignor to Walker Manufacturing Company of Wisconsin, Racine, Wis., a corporation of Wisconsin Application August 18, 1941, Serial No. 407,330

' 3 Claims. 01. (29-239) This, clifliculty is further enhanced by the relative inaccessibility of mulilers, exhaust pipes and tailpipes in motor vehicles. As a result, at-

tempts to separate these elements frequently result in the destruction of anotherwise satisfactory part of the exhaust system of the motor vehicle.

It is the object of the present invention to provide an exceedingly simple, inexpensive. and prac- Fig. 9 is a View of the ratcliethandle forming a part of the device; and a Fig. is a view of the ratchet element incorporated in the handle illustrated in Figure 9.

As indicated in Figure l, aconventional tail pipe It) in an internal combustion engine exhaust system is secured to the muffler I l by telescoping the tailpipe Ill into a split sleeve l2, fixed to the end .l3 of the muffler. When the parts are initially assembled, a removable holding strap, not shown, embraces the split sleeve i2 and clamps the. sleeve upon the tail pipe It]. A similar connection is utilized between the muffler and the exhaust pipe, and the present inventionis equally adapted for use in separating either connection. When it is desired to remove either the exhaust pipe or the tail pipe from the muiiler, the holding tical device, which may be designated a mufiler jack, for the purpose of exerting a very high direct line pulling force to separate a mufiler from either its exhaust pipe or tail pipe.

A further object of the invention is to provide a device of the type mentioned whichis adapted for use on a majority of motor vehicles and which is designed to permit use where the parts to be separated are relatively inaccessible.

Other objects and advantages of the invention will become apparent from the following specification, the accompanying drawings, and the appended claims.

In the drawings; in which like numerals are used to designate like parts in the several views throughout: I I Figure 1 is a fragmentary side elevation of a mufller and tail pipe, illustrating the manner in which the improved device of the present invention is utilized; 1 i

Fig. 2 is an enlarged view of the principal parts of the device, or muffler jack;

Fig. 3 is an elevation of the deviceshown in Figure 2, taken at right angles to Figure 2;

Fig. 4 is a view similar to FigureZ, showing a modified form of the invention; 7

Fig. 5 is an elevation of the modified form shown in Figure 4, taken at right angles to the view shown in Figure 4;

Fig. 6 is a front elevational view, partly in section, showing the form of clamputilized in connection with the device;

Fig. 7 is a side elevation of the clamp; Fig. 8 is a section taken on the line 8--8 of Figure 6; i

four identical levers. pair of levers l6 and l! are pivotally secured at strap is removed and the parts are separated by direct axial pulling movement. In actual practice, as a result of what is frequently termed a corrosion weld, which forms between the telescopic pipe I0 and sleeve 12, it is exceedingly diflicult to separate the pipe .and miufiier, and.

attempts to do so frequently result in destruction of one or both of these elements.

The preferred form of mechanism embodying the present invention, which is best illustrated in Figures 1, 2 and 3, comprises .a specially designed scissors jack mechanism comprising a plate l4 having a, slot l5 formed in its upper edge.

The slot i5 is of sufficient width and depth toreceive and embrace the tail or exhaust pipe and the attaching sleeve of the mufller. In actual practice, motor vehicle exhaust and; tail pipes vary in size from approximatelyone and a ,half inches to two and a half inches in diameter, and the slot IS in the plate It is preferably made sufiiciently wide and deep to" receive the largest size of pipe. H v

The scissors mechanism, itself, isfformed of Of.these four levers, one

one end by means of rivets l8 and I9 to angle brackets 20 and 2t, which,.in turn, are welded or otherwise secured, respectively, to the plate I4 at opposite sides of the slot l5. The axes of the rivets l8 and I9 are aligned to permit the levers l6 and I! to swing as a, unit. The second pair of levers .24 and 2,5 are pivoted intermediate their endsto a corresponding point on the levers l6 and [1, respectively, by means of a. spacer member 26, which extends between the levers 24 and 25 and is provided at its ends with trunnions 21 and 28 extending through suitable aligned openings in the four' levers.

The opposite ends of the lever l6 are secured screw 38, as viewed in Figure 2, is provided with a reduced trunnion 39 journalled for rotation in a suitable opening in the spacer 34. The

shoulder formed on the screw by-the reduced end) .portion 39 seats against a flat surface 40-formed on the spacer 34 to form an axial thrust bear ing. The end of the trunnion 3-9. is riveted over at 4| to retain the trunnion 39 Within the opening in the spacer 34.

It: will be obviousthat as a result of the mechanism so far described, rotation of the screw 36 willcause the two pairs of leversto pivotrelative to each other about the aligned trunnions 2-1 and 26. In order to effect: such rotation of the screw 36,. the end thereof is provided with a hexagonal shank 44 adapted to receivea specially designed. ratchet handle indicated generally at 465inF'igure l and hereinafter described in further detail.

I In use, it .will be apparent that the plate,l.4 is

fitted over. the tail pipe II! or sleeve l2 and seated against the end I3. of the muffier Hto providean axial thrust support for the jack mechanism. The free ends 46 and 49: of the levers. 24 and 25 are-spaced apart sufficiently to embrace the tail pipe 10,, and" they are. adapted to: engage a specially designed clamp, indicated generally at 56 in. Figure l, which isfixed upon the tail pipe Ill.

tubular member 6l having an axial hexagonal socket; 62 adapted to fit the shank 44 of the screw 38 as well as the nuts 56 and 51. A pair of side plates 63 and 64 are journalled on the tubular member 6i and pivotally support a handle 65 by means of a rivet 66 passing through the side plates 63 and 64 and the handle 65. Pivotal movement of the handle 65-with. reference to the side plates 63 and 64 is limited by a slot 61 formed in the handle and adapted to receive a rivet 68 fixed to and extending between the side plates 63 and 64. Slot 6'! so limits the pivotal The clamp 50, as best shown in Figures 6, 7

and 8, is formed of. two approximately semicircular clampinglelements 52 and 53, which are secured. together. by bolts 54 and. 55. in such a way that tightening'of the bolts increases the clamping pressure of the two clamping portions,- I upon the tail or exhaust pipe. The bolts 54 and 55 are provided with hex headed nuts Hand 51, respectively, which are preferably of the same sizea-nd shape as the end portion 44 0f thescrew 38 in order that the ratchet handle 46 may fit both the nuts'and the stem 44 of the screw.

It will be noted, as best shown in Figures 6 and 8, that the clamping elements 52 and 53 are speciallyconstructed to exert a maximum gripping acti'onon' the ipe to prevent any axial slippage during operation of the jack mechanism. For this purpose, the innersurfaces of the clamping elements, which surfaces engage the pipe, are recessed, as best shown in Figure 8', to provide annularridges, or knife edges, 58 and 59 at each side of the' clamp adapted to' dig in or embed slightlyin the tail pipe and have a positive gripping action. The ridges 58 and 5'9 are preferably formed as segments of acircle whose diameter is equal to the largest diameter of the pipe to which the clamp will be applied. Itwill benoted, as shown in Figure 6, that when the clamp is used on smaller pipes a gripping action is further enhanced by reasonof the fact that the knife edges 58 and 59 engage onlya limited portion of the periphery of the pipe.

The ratchet handle, which may be used to opera'tethe screw 38' as well as to tightenv the nuts 56 and 51' of the clamp, is shown detail in beneath a motor vehicle.

movement of the handle relative to the side plates that in one extreme position, illustrated e in Figure 9, a' dog 69, formed on the end of the handle, will operatively engage one of the ratchet teeth; whereas, in the opposite extreme position of the handle relative to the side plates 63 and 64, the dog 19 will be entirely disengaged from the ratchet,

As a result of this arrangement, upon movemnt of the handle 65 counterclockwise, asviewed in Figure 9, the dog 69 will engage with the'ratchet teeth and cause rotation of the ratchet and the socket sleeve 6|. When the handle 65 is moved in the opposite or clockwise, direction, the dog 69 will disengage from the ratchet teeth and no movement of the ratchet Wheel or sleeve 6|; will occur. The use of a ratchet handle. or wrench for: thepurpose of operating the screw 38 or the nuts 56 and 5:1 is' of advantage in view of the limitedispace available to operate the mechanism The mode of use of the preferred form of the invention shown in Figures 1, 2 and 3 is believed tobe obvious-from theillustration in Figure-1.

" closely as possible. Accordingly, if the pipe It] and sleeve l2 are relatively small in diameter, it may be necessary to let the supporting plate 14 drop down slightly until this condition is achieved. Before placing the mechanism in position, the

scissors mechanism should be collapsed as far as possible andthe clamp 56 should be placed as close as possible to the muilier, leaving only sui- Figures 9 and 10. The ratchetlhandleor wrench,

ficient. roomto insertthe collapsed scissors mechanism. When the parts are in position, the ratchet handle 46 is simply operated to expand the scissors mechanism and exert a pushing force in opposite directions upon the mufiier and clamp 50. It is possible, with the'mechanismshown, for an-or-dinary workman to exert force in'the neigh borhoodof one. thousand: pounds, which is adequate. to'sepa-rate the exhaust or tail pipe from the mufiier under all ordinary conditions.

While the use of the plate I4. is of a great advantage in assisting the workman in locating the mechanism in proper position and in supporting the mechanism in use, it can be omitted and the jack mechanism constructed as shown in Figures 4 and 5. In this modified form, the mech anism is identical to that previously described exceptthat theangle brackets Z'Uand 2 I ,-wh'ich are pivoted by means of rivets l8 and I9 tii 'th'e upper ends of the levers l6 and I 'l', are intended, to directly engage, the end l3 of the mufller I I.

This modified form of the invention, as illustrated in the drawings, alsolincorporates a further feature in that the upper ends of the links .24 and 25', instead of directly engaging the clamp, are provided with angle brackets 10 and H, respectively, which are pivotally secured to the levers by means of rivets I2 and 13. The angle brackets 10 and 1| provide flat surfaces of increased area to engage the clamp 50. It will be apparent that a similar arrangement of angle brackets may be utilized in connection with the form of invention shown in Figures 1, 2 and 3, if desired.

While only two forms of the invention are shown and described, it will be apparent that various modifications of the details of construction may be resorted to without departing from or the scope of the apthe spirit of the invention pended claims.

What is claimedis: 1 1. A device for separating telescoped elements,

comprising a pair of substantially parallel levers secured together at one end, a second pair of substantially'parallel levers secured together, at

i one end, the levers of each'pair being pivoted intermediate their ends to the levers of the other pair, respectively, to form a scissors linkage, means connected between the ends of the pairs of levers which are secured together for varying the distance between said ends of the two pairs of levers, the opposite ends of said levers being spaced apart so that said device may freely be fitted over said tube from the side thereof and being adapted to embrace the telescoped elements and engage axial thrust sustaining surfaces on said members at diametrically opposite sides of said members.

2. In a device for forcibly separating an exs 3 haust muffler from a tube telescoped with respect thereto, a plate having a slot in one edge of a width and depth sufiicient to receive and embrace said tube with the plate engaging the endof the mufiler at diametrically opposite sides of the tube,

a pair of substantially parallel levers pivoted on a common axis to said plate at opposite sides of said slot, an element pivotally secured to and between the opposite ends of said levers on an axis parallel to said first mentioned axis, a second pair of substantially parallel levers pivoted, respectively, to the levers of the first pair intermediate an axis parallel to the aforementioned axes, and a jack mechanism connected to and betweensaid elements.

3. In a device for forcibly separating an ex haust mufiler from atube telescoped with respect to said mufller, a scissors linkage including a pair of lever structures pivoted together intermediate their ends, means connected between the end of one lever structure and thecorresponding end of the other lever structure for pivotally swinging said structures relative to each other, the opposite end of one of said lever structures being pivotally secured to a plate having a slotin one edge adapted to receive and embrace said tube, said plate being adapted to engage the end of said mufller at diametrically opposite sides of the tube, the opposite end of the other lever structure being adapted to embrace the tube and operatively engage thrust sustaining surfaces on said tube at diametrically opposite sides of said tube.

JOSEPH J. MIZER.

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