US1310498A - Lieting-jack - Google Patents

Description

I E.' J. LEMAN.

LIFTING JACK.

APPLICATION man MAYI, 19H.

Patented July 1919 FFTG EDWARD J. LEMAN, OF MORTON, ILLINOIS.

LIFTING-JACK.

Specification of Letters Patent.

Patented July 22, 1919.

Application filed May 1, 1917. Serial No. 165,694.

nois, have invented certain new and useful Improvements in Lifting- Jacks, and do hereby declare that the following is-a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a lifting jack and moreparticularly to a lifting jack for automobiles.

One bf the objects of the invention is to provide a jack for engaging the wheel of an automobile or other vehicle that can be clamped thereto making a rigid support for the same. 1

Another object is to furnish a jack for each wheel which in the act of lifting the wheel will automatically clamp itselftheree to and act to support the vehicle which can be shifted from place to place on the floor or turned around as upon a turn-table, the

jack being provided with supporting wheels for the purpose.

Another obJect 1s to furnish a jack having a part to engage beneath the hub of the wheel of the vehicle and having apart to engage over the rim or felly of the wheel, the relation of the parts being such that when the wheel is raised it will be firmly clamped so that the wheel and jack are as though a single structure. 7

Another object is to provide a jack that can be clamped firmly and rigidly to the wheel of avehiole and provided with casterwheels which in use will lie outside of the point of contact of the Wheel with the ground surface.

To the end that the invention may be understood I have provided the accompanying drawing, in which,

The jack consists first of a supporting frame or platform which may be constructed 111 one of several ways. It may be cast or, if preferred, may consist of a single length of metal bar of the desired cross sectional area formed into an elongated frame A whose terminal ends may abut as shown in Fig. 4:,the two sides of the frame being substantially parallel. 'Said frame incloses at each extremity a suitable casting B secured in said frame by means of bolts C, for example, said castings having beneath each of them a caster-wheel D swiveled thereto and adapted to freely swing about their pivots E in said casting B. These casters may be of any approved form and preferably of the ball-bearing variety.

F is a brace substantially in the form of a V, its ends being suitably secured to one of the parts of the frame by means of rivets G, for example, the base of the brace being preferably flattened so as to receive the terminal ends of the frame A and each of the latter is secured thereto by means of rivets H, for example, said rivets also passing through the base of a portion of a U- shaped yoke J securing all in a thoroughly rigid manner.

.The said yoke is provided with one or more holes K, Fig. 5, one of them receiving a bolt L acting as a pivot for a member which terminates at its outer end in a hook M adapted to overlie the rim or felly of the wheel as shown in Fig. 2, whose purpose will be explained presently.

N N indicate two spaced uprights lying substantially parallel to one another and preferably made ofchannel-bar, their lower ends being secured to the frame A by means of bolts or rivets 0, Fig. 1. These are held rigidly in a perpendicular position by means of diagonal braces P whose upper ends are suitably secured to them, the lower ends of the braces being secured to the opposite side of the frame by means of bolts or rivets Q.

Between the upper ends of the uprights N is pivotedat RR a lever S in the form of a yoke, by preference, the free ends of which extend beyond the pivots, and T is a stirrup whose extremities are pivoted relativelyto the extended ends of the described portion S, for instance on a bar or rod U. The manner of using the jackisclearly shown in the first two figures wherein after placing it close to the wheelindicated by 2 with the hook M overlying the felly the lever S is made to occupy a position which will permit the stirrup T to be engaged beneath the hub V of the said wheel.

By depressing the lever the wheel is ralsed thereby bringing its felly up into the hook M, the continued lifting movement drawing the felly firmly into the hook. In the continued lifting action the tendency is to shorten the distance between that part of the felly upon which the hook rests and the pivot L of the latter. This draws the wheel and the frame A of the jack firmly together, acting to clamp them one to the other. In addition the wheel is clamped between the hook M and said stirrup and as the full downward movement of the lever is completed it is moved inward until the pivot points of the parts, S, T, are in such a relation that the weight of the vehicle cannot re-act to raise said lever, the latter being preferably placed against the spokes of the wheel, thus carrying the pivot at U outward or outside of a vertical line drawn through the centers of the said pivot U and the pivot R. The stirrup may be provided with one or more holes W for adjusting it relatively to the lever S to accommodate wheels of different diameters. Also, the holes K in the U-shaped member J admit of the adjustment of the hook M for the same purpose.

Slight changes maybe made in the structures without departing from the inventive idea, it being observed that the introduction of the hook M operating as a clamping member in conjunction with the stirrup T results in firmly clamping the wheel and the jack together so that by attaching one of the jacks to each wheel the vehicle is then supported above the floor so that it may be shifted to any position desired or be readily turned around.

The simplicity of the jack and the fact that it can be thus clamped to a wheel makes it of the greatest value for the quick lifting of the tires from the floor for removing the weight from them when the vehicle is not in use.

If used for this purpose only the casters D need not be used but their addition admits of the ready shifting of the vehicle from place to place on occasion.

Having thus described my invention, I claim:

1. A jack for engaging in the wheel of an automobile comprising a wheeled platform, a hook pivoted at one end thereon and adapted at its hooked end to pass through the wheel and engage over its rim for holding the same against the said platform, a standard supported upon the platform, and a lifting part thereon to engage and lift the wheel, the relation of the lifting part both Copies 'of this patent may be obtained for live cents each, by addressing the Commissioner of Patents,

Washington, D. 0.

wheeled platform, a hook pivoted at one end thereon and adapted atits hooked end to pass through the wheel and engage over its rim for holding the same against the said platform, a standard supported upon the edge of the platform lying nearest the wheel-rim, and a lifting part thereon to engage and lift the wheel, the relation of the lifting part both to the portion of the wheel which it engages and to the said hook being such that the higher the wheel is lifted toward its limit of raising movement the more firmly it is forced up into the hook and the more firmly the rim is held against said platform by said book.

3. A jack for engaging and lifting a wheel of a vehicle comprising a platform, a member pivoted upon and extending laterally from the platform terminating in a downwardly turned hook outside said platform in'position to engage over the rim of the wheel at the side thereof remote from the platform, a standard uprising from the platform, and a art mounted thereon to engage the wheel-1111 1 for lifting the wheel-rim into the hook and for sustaining the wheel in the raised position, said hook adapted in the lifting movement to draw the rim toward and clamp it against the platform.

4. 'A jack including in its construction a platform including spaced portions forming an open frame, a wheeled member for each end of said platform having a part adapted to enter between the portions and also having an extended shoulder to receive the portions upon it, means to secure the said part to the portions, a yoke secured inside the platform to one of the portions including a series of holes, a member lying at .one end within the yoke and having'a downwardly turned hook at its other end lying outside the platform, means to pivotally support the member at any one of the holes, a standard erected upon the platform at thatside thereof beyond which the hook extends, and a lifting and supporting member carried by the standard.

In testimony whereof I affix my signature, in presence of two witnesses.

EDWARD J. LEMAN.

Witnesses:

W. I. SLEMMoNs, L. M. THURLOW.

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