US2013918A - Lifting jack - Google Patents

Description

Sept. 10, 1935. T. J. KELLEHER 2,013,918

LIFTING JACK Original FiledvOCt. 18, 1933 @77077705 :[Jfe//eher v, f u

Patented Sept. 10, 1935.

LIFTING JACK Thomas J. Kelleher, Chicago, lll.

Application October 18, 1933, Serial No. 694,177 Renewed February 11, 1935 claims. (ol. zal- 133) My invention relates to lifting jacks, and more particularly to the type used for lifting motor cars and the like, and my main object is to provide a jack of this kind which is applicable at points of, easiest access to the car.

A further object of the invention is to provide a jack which is applied to such parts of the car as are fully exposed and in the clear, making it unnecessary to push the jack under the car.

A still further object of the invention is to provide a jack which is .adapted to be positioned laterally of the part engaged for lifting and fully exposed for handy manipulation.

Another object of the invention is to construct the novel jack with an element adapted for interlocking engagement with a part of the car to be lifted, such as a bumper or frame member.

An additional object of the invention is to design the. novel jack whereby to stand in erect po- A sition fully clear of the car for the application of a manipulating tool.

With the above objects in view, and any others that may suggest themselves from the specification and claims to follow, a better understanding of the invention can be had by reference to the accompanying drawing, in which- Fig. 1 is 4an elevation of the rear portionof a typical motor car, showing the novel jack applied;

Fig. 2 is an enlarged elevation of the jack, partly in section; and

Fig. 3 is a section on the line 3-.3 of Fig. 2.

It is a-familiar fact that the application of a lifting jack to the conventional automobile is an awkward and unpleasant task, since one must stoop to push the jack under the axle or other part to be lifted, or crouch in an uncomfortable position to look under the car and see where a hold can be taken. Also, ones clothes are subject to become soiled or wrinkled during the effort of applying or adjusting the jack. The task has become more diiiicult and unpleasant with the advent of balloon tires and smaller wheels, as the car is thus made lower and parts underneath it harder to reach. It has therefore been my intention to eliminate the diiculties recited above by providing a jack which can be applied in a fully exposed and very handy position, and which does not require one to secure a hold under the car.

In carrying out the invention, specific reference to the drawing indicates a typical motor car at 5, and the rear bumper carried by the same at 6.

It is my intention to engage the bumper for the purpose of lifting the car at one side or the other, as the bumper is usually sturdy enough and made suiiciently fast to the car to virtually form a part thereof.

Accordingly, I provide a' jack fundamentally 5 embodying avertical screw 1 of a diameter varying from three-fourths of an inch and upwards according to the size or weight of the car for which the jack is intended. The screw is reduced with a bottom stem 8 which lis passed loosely lo through an opening 9a made centrally in a base plate 9, the medial portion 9b of the plate being raised as indicated, to allow the stem 8 to project a short distance below the plate. Here the end of the stem is upset or spread, as indicated at 8a, 15 to lock it from withdrawal relative to the base' plate 9. Thus, the screw 1 is in swiveled relation with the base plate.

Along the screw is disposed a heavy nut I0, the latter being .made with a. lateral extension loa, 2 terminating with an upward hook H, the top of the nut having a drop, groove, or pocket Ib be' tween the hook and the main portion of the nut. The latter is generally square, as seen in plan, and the hook is therefore of corresponding width. However, the hook is reduced at thel top with a round stem l2, medially positioned and having the edges of its top surface rounded, as indicated at I2a. The body of the nut is preferably finished off in semi-circular form, as indicated at lllc, in the region of the extension Illa. The upper end of the screw l is formed with a hexagonal head 'la of a size suitable to receive the conventional wheel wrench carried in most cars, and indicated by dotted lines at I3 in Fig. 1.

In applying the novel jack, it is simply erected behind the bumper 6, as indicated in Fig. 1, while the nut I0 is in' a-relatively low position. Then the wrench I2 is applied, as shown, to turn 40 the screw until the hook Il will engage the low'er edge of the bumper, as clearly shown in Fig. 1. Now, the further rotation of the screw will lift n the bumper and the corresponding side of the car.

It is understood that the jack may be applied and operated with equal facility at the front end of a carin case a bumper is carried thereby.

In case a car is not equipped with bumpers, or it is not feasible to use them for lifting, it is possible to apply the novel jack by simply drilling an exposed portion of the car frame With-a hole from underneath. This can easily be done at I the factory where the present jack is provided as standard equipment. In such a case, it is a simple matter to insert the hook pin I2 upwardly 55 into the apertured frame portion and so secure a hold or anchor to prevent the jack from becoming separated from the car.

It will be seen that while the novel jack is naturally made taller than the conventional auto jack because it has to negotiate a part which is relatively high above the ground, it is an article of utter simplicity, having only three par-ts. Further, the jack can be constructed as sturdily as the circumstances may require, without materially adding to its size or weight. It can be made cheaply because it follows ordinary and well established principles of mechanics, and requires no delicate or complicated parts. As it requires no special handle, it can be laid in the tool box or under the seat lengthwise to occupy a minimum of room, and can be handled roughly without losing any adjustment or suffering any harm Whatever. Since the application of the jack is clear of the car, one need not stoop or crouch to apply it, but only has to place it near the bumper, as mentioned, and stand in the clear while manipulating the handle of the wrench, so that the garments do not become soiled or wrinkled. Finally, the novel jack is an article which can be handled and operated with extreme ease by the average person.

I claimzl. A screw jack comprising a vertical screw, mounting means for the same, and a lifting member threadedly carried by said screw, said lifting 4 member having a lateral projection, and -a substantiallysquare transverse groove on the upper surface of said projection.

2. A screw jack comprising a vertical screw, mounting means for the same, and a lifting member threadedly mounted on said screw, said lifting member having a lateral projection, an upstanding portion on said projection, and a substantially square transverse groove on the upper surface of said projection.

3. The structure of` claim 2, and an upright pin arising from the tip of said upstanding portion.

4. A lifting jack for automobiles, comprising a vertical screw, a portion of said screw being formed to engage a wrench for rotating said screw, a base plate pivotally secured to the lower end of said screw, a. lifting member threadedly mounted on said screw, a lateral projection on said member, an upstanding portion on the free end of said projection, and a substantially square transverse groove on the upper surface of said projection.

5. A lifting jack for automobiles, comprising a vertical screw, a hexagonal head on the upper end thereof, a reduced portion on other end thereof and the free end of said reduced portion being enlarged, a base plate having an upstruckcentral portion, said upstruck portion being formed with a central aperture to mount the same upon said reduced portion of said screw, and said base plate being retained upon said reduced portion by reason of the enlarged free end thereof, a lifting member threaded on said screw, a. lateral projection on said lifting member, said projection having an upstanding portion to form a hook for engaging a projecting part of an automobile, and an upright reduced u portion of said hook and comprising a pin for the engagement with a complementary aperture in a projecting part of an automobile, and a substantially square transverse groove in the upper surface of said lateral projection of said lifting member to seat the lower edge of an automobile bumper and prevent the rotation of said lifting member when said screw is rotated.

THOMAS J. KELLEHER.

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