US2239729A - Lifting mechanism - Google Patents

Description

' April 29, 1941. i J, J, MIZER LIFTING MECHANISM Filed May 3, 1940 9 M, ATTO EY INVENTOR I-TaJe/I; J Milan Patented Apr. 29, 1941 LIFTING MECHANISM Joseph J. Miner, Racine, Wis; assign'or to Walker Manufacturing Company of Wisconsin, Racine, Wis., a corporation of Wisconsin Application May a, 1940, Serial No. 333,183

3 Claims. (SI. 254-433) The present invention relates to vehicle lifting mechanisms, and in particular is directed to improvements upon the arrangements described and claimed in applicant's cop'ending applications, Serial Nos. 329,357, 329,359, and 333,457, filed April 12, 1940, April 12, 1940,- and May 6, 1940, respectively, and assigned to the same asslgnee as the present application.

The above identified cop'ending applications disclose and claim certain aspects of lifting structures comprising a head provided with a lifting lug adapted to engage a pro;ecting part of a Vehicle wheel, a column for supporting the head, and means to elevate the head-relative to the base. In the arrangements specifically disclosed in said copending applications, the lifting lug is applied directly to a permanent and fixed part of the wheel structure, specifically either the vehicle rim or the outwardly presenting recess which defines the hub of the wheel.

In accordance with the present invention, it is proposed to improve the holding relation between the wheel and the liftinglug by interposing an adapter therebetween, which adapter is readily applied applicable to and removable from the hub structure upon the removal of the usual hub cap, and which adapter is also preformed to adapt it for holding relation to the lifting lug otthe jack. The relation is also one in which the adapter isso formed as to have two bearing points relative to the jack, so that the load transmitted between the adapter and the jack firmly holds the adapter in place relative to the wheel.

With the above as well as other considerations in view, which appear in the following description supporting base I may be formed as metal stamping, having a pocket l5 depressed from the upper surface thereof so as to receive the lower end of the column iii. The pocket i5 is preferably generally rectangular in form and so prevents substantial rotation of the column I!) therein. but at the same time the fit between these parts is loose enough to permit a certain amount of tilting movement of the column either toward or away from the wheel or forwardly and rearwardly of the vehicle.

The lifting head 16 is illustrated as formed of metal stampings, and is provided, as will be understood. with usual operating mechanism, responsive to the handle 18, so that by operating the handle up and down, the head It may be caused to move upwardly or downwardly along the column II. The direction of the movement of the head is, of course, controlled by the usual adjustmg lever 20, and as is usual, the head I6 is nonrotatlve relative to the column.

'rfie lifting head It is provided with a lifting lug 22, ofthe form disclosed and claimed in applic'ants above-identified copending application Serial N0, 333,457. Briefly, this lifting lug 22 is and in the appended claims, an illustrative embodiment of the invention is shown in the accompanying drawing throughout the several views of which corresponding reference characters are used to designate corresponding parts and in which:

Figure 1 is a view in side elevation of a vehicle formed from a metal strap having the outer face 2 vthereof rounded, as viewed in the plane of the paper. The lug '22 is of substantial width, and if desired, it may be rounded, as viewed in Figure 3, in accordance with the disclosure of the justmentioned copending application. Such rounding is not necessary, however, in the practice of the present invention and in the present instance, the lug 22 is illustrated as being linear, as viewed in Figure 3.

The adapter 23 is illustrated as being formed of a casting or the like, and as having a relatively heavy upper body portion provided with a recess 22 of a width suflicient to freely receive the lug 22 and the upper marginal surface 30 whereof is rounded to form a pocket to receive the rounded face of the lug 22. The lower body portion of the adapter," is formed to define an opening between the two leg portions 32 and 34, which opening is large enough to accommodate the wheel spindle 38. The lower ends of the legs 32 and 34 are connected by an outwardly projecting portion 31, which, as shown, bears directly against the lower body portion of the lifting head IS. The upper marginal edge 38 of the adapter 26 is rounded to conform to the radius of curvature of the adjacent hub recess 40 associated with the vehicle wheel 42 and this upper portion or the adapter 2l is also provided with a recess 44 to accommodate the usual spring element, such as 18, provided on a vehicle wheel to hold the hub cap (not shown) in place. It is to be understood that the recess 44 is preferably somewhat wider than the spring element ll.

It will be appreciated that the head normally 5 remains assembled on the column, but that these two elements are normally detached from the adapter and from the jack base. Assuming it is esired to use the present lifting device, removal of the wheel hub cap permits the adapter to be slipped over the spindle and loosely held with the rounded upper surface enga in the 00 D- erating part of the hub recess. Thereafter, the column may be seated in the base of the jack and the base positioned immediately adjacent the base of the tire in the relation shown in Fig. 2, following which the lifting head may be' elevated sufficiently to bring the lifting lug into engaging relation with the cooperating adapter recess 3|.

When so positioned, the jack becomes effective to freely permitted by the tiltable connection between the base and the column.

As the Jack head is elevated, following the above described initial positioning of the parts, the lug 22 causes the adapter surface I! to solidly bear against the hub surface ll and apply a lifting force to the wheel. The lifting force thus applied to the wheel through the adapter tends to rock the adapter in a counterclockwise direction, as viewed in Fig. 2, about the surface 38 as a center. because the adapter portion 31 bears against the face of the lifting head. The Jack, therefore, not only applies a lifting force to the adapter, and consequently to the wheel, but also servesto adidly hold the adapter in place relative to the hub.

Although only a single, specific embodiment of the invention has been described in detail, it will be appreciated that various modifications in the form, number and arrangement of the parts may be made without departing from the spirit and scope of the invention.

What is claimed is:

1. In combination, a load carrying vehicle Any such rotation is, however, prevented 40 wheel having a tire and having in the outer face of the wheel a recess which is substantially concentric with the wheel and the marginal surface whereof extends outwardly toward theouter face of the wheel, a detached adapter formed to operatively engage under said marginal surface, and

a detached jack having a base adapted to rest upon the road surface, a column extending upwardly from and supported by the-base and a head on the column formed to operatlvely engage said adapter so as to apply a lifting force to said wheel through said adapter, said Jack having means associated therewith to positively hold said adapter in engaging relation to said marginal surface during said lifting action.

2. Lifting mechanism for a vehicle wheel, said wheel having in the outer face thereof a recess which is substantially concentric with the wheel and the marginal surface whereof extends outwardly toward the outer face of the wheel, comprising a detached adapter having a first part formed to operatively engage under said marginal surface and a second part adapted for engagement by a jack, and a detached jack comprising a base adapted to rest upon a supporting surface, a column carried by the base and extending upwardly therefrom, and a head carried by the column, said head having a part formed to operatively engage under said second adapter part so as to apply a lifting force to said wheel through said adapter, and said head having means associated therewith to apply a force to said adapter to hold said adapter in place relative to said recess.

3. Lifting mechanism for a vehicle wheel, said wheel having in the outer face thereof a recess which is substantially concentric with the wheel and the marginal surface whereof extends outwardly toward the outer face of the wheel, comprising a detached adapter having first, second and third spaced loading parts, said second loading part being positioned between said first and third parts, said-first part being formed to operatively engage under said marginal surface, and a detached Jack having a head formed to operatively engage under said second part so as to apply lifting force to said wheel through said adapter, and said head having a portion adapted to bear against said third part during the lifting action so as to prevent said adapter from becoming unseated from said recess.

JOSEPH J. MIZER.

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