US2579151A - Piston holding attachment for vise jaws - Google Patents

Description

Dec. 18, 1951 O T. D. LLOYD PISTON HOLDING ATTACHMENT FOR VISE JAWS Filed Dec. 19, 1950 INVENTOR.

Patented Dec. 18, 1951 mural) STATES {OFFICE VISE JAWS j 7 Thomas D. Lloyd, Sun Valley, Application December 19, 1950, Serial o. 01,652

room for improving upon such devices, one defect in them being a lack of capacity for supporting the piston at a sufficiently high level in relation to the jaws of the vise to enable the workman 1 Claim; (01.- s1'-39) to mount-said piston in an upstanding position 1 I without interference of the connecting rod with the vise slide. Also the gripped work has hitherto not been supported in so clearly visible and tool-accessible a manner as i desirable.

Furthermore, hitherto the piston rings have part 9. Said horizontal part8 is provided with a had. to be removed before placing the piston in its vise-supported position, thus causing an unnecessary waste of time.

Accordingly, objects of the present invention are to overcome the aforementioned defects by providin a device which, when attached 'to the jaws of a conventional vise, will grip an engine piston and rod assembly with the rings still on the piston, so that the rings and pin may be replaced and the grooves cleaned and/or widened or deepened without removing that assembly from the vise; to provide a device to render the supported piston more completely visible to the workman and more readily operable upon by his tools, so that he may make the necessary repairs and do the required cleaning with the expenditure of less time and effort; and to provide, in association with other improved features, an engine piston gripping attachment for a vise that will have a pair of gripping jaws contoured in such a manner as firmly to hold in mounted position engine pistons varying greatly in size.

The construction is such that the mounted piston has adequate support, and is held securely at all times, thus insuring that it will not be distorted. Furthermore, a vise equipped with this attachment will hold the piston equally well either in normal or inverted position, making it possible to reassemble piston, pin and rod and/or bushings whenever necessary.

Other objects, advantages and features of invention will hereinafter appear.

Referring to the accompanying drawing, which illustrates a preferred, reduced to practice embodiment of the invention;

Fig. 1 is a fragmentary, perspective view illustrating the device as applied to' a conventional vise and in use to support a piston and its connecting rod in a normal, upright position to be worked upon. The vise is shown in phantom lines. The scale of this view is somewhat smaller than that of the remaining viewst Fig. 2 is an elevational view of one of the twin holding shoes provided by the invention for attachment to the jaws of the vise, the observer looking at the work holding face of said shoe.

Fig; 3 is a top plan view of the shoe shown in Fig. 2, the viewpoint of the observer being in dicated by line 3-3 of Fig. 2.

Fig. 4 is an endelevation looking at the right endof the shoe shown'in Fig.2.

Fig. 5, is a cross'sectio'non line 5-5 of Fig. 2.

Referring in detail to the drawing, the device comprises a pair of twin shoes Band 1 each of which has a body portion consisting of a horizontally disposed part 8 and a vertically disposed fiat under surface seatable upon the upper surface of either of the conventional vise jaws, a stationary vise jaw l0 and cooperating movable vise jaw H being shown in Fig. 1, together with the vise slide or guide bar I2. vThe upp rpqre tions of these two jaws are dimensioned and contoured alike, hence the twin shoes 6 and I are interchangeable in relation to them.

It will be seen that the body portion 8 of each shoe provides a shelf that extends all the way across the underlying vise jaw, said shelf having an internal jaw engaging surface l3 and carrying at each end a downwardly directed flange l4 having through it a screwthreaded hole I5 to receive a set screw I6, four set screws being used to secure the shoes to the jaws of the vise.

In each shoe the horizontal body portion 8 intersects the vertical body portion 9 at a right angle thus forming adjacent faces which overlie and abut the top and front faces of the vise jaw. Said vertically disposed body portion has on its exposed face twin forward projections I 8 which are triangularly shaped as viewed in plan, said projections combining to produce between their apices a broadly V-shaped recess l9 with a rounded vertex 20.

Said horizontally disposed body portion 8 has its exposed face sloped upwardly and forwardly and merged in front with the aforesaid triangular projections 18, thus lengthening upwardly the piston gripping face of the shoe. Said forwardly sloping face of the shoe is provided with an arcuate midlength recess 2| with two twin, up-

wardly projecting parts 22. This recess affords space in which to position a tool for removing a wrist pin of a piston 25 gripped between the shoes 6 and 1.

Without the additional support provided by the upper projections 22 carried by the shoes, affording gripping surfaces above the tops of the vise jaws, there would be an insufiicient grippingsurface provided by the device to grip the skirt portion of the piston and at the same time hold the piston in a position for driving the wrist pin therethrough as shown in Fig. 1.

Said upper projections can be modified considerably as to size and shape without impairing their function, but should be of the proper Size, and

shape to cooperate in clamping in the mounted position engine pistons ranging from'the smallest to the largest size now being manufactured,

and provided also that in the mounted position of the piston the latter will be elevated sufficiently so that the connecting rod will not interfere with the vise slide;

Each upwardly projecting part or rise 22 is shown having :a restricted fiat, horizontal top surface 220. and aback surface area 221) which inclines downwardly to the outer side of the shoe; while the end surface 220 of the rise 22 is shown spaced inwardly from the adjacent end of the shoe leaving room for a horizontal ledge 8a which is substantially on the same level as the lowestpart of the aforesaid depression or recess 21.

In Fig; 1 the gripping faces of the shoes and 1 are assumed to be lined with a compressible can be rocked about its two attaching screws It to a suflicient extent to cause the mounted piston to aline perfectly with the parts between which it is clamped.

I claim:

Mounting means for pistons comprising twin members adapted to be mountedv on the jaws of a conventional vise, each member consisting in part of a shoe having horizontally and vertically disposed body portions which intersect at a right angle and form adjacent faces which respectively overlie and abut the top and front faces of the vise jaw, each vertically disposed body portion having on its exposed face twin forward projections which are triangularly shaped as viewed in'plan, said projections combining to produce between their apices a broadly V-shaped recess and each horizontally disposed body portion having its exposed face sloping upwardly and forwardly and merging in front with said forward projections to lengthen upwardly the piston gripping surface of the shoe, said forwardly sloping upper face having in its top surface at the midlength of the shoe a depression affording space in which to position a tool for removing a wrist pin of a piston gripped by said mounting means.

THOMAS D. LLOYD.

material, for example rubber or canvas, to guard REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 791,3'7 1 Shepardson May 30, 1905 1,273,319 Blakely July 23, 1918 1,393,083 Campbell Oct. 11, 1921 1,672,808 Hansel June 5, 1928 2,100,534 Zimmerman Nov. 30, 1937 V FOREIGN PATENTS Number Country Date 18,526 Great Britain -1 Oct. 27, 1891

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