US2129806A

US2129806A - Lifting jack

Info

Publication number: US2129806A
Application number: US131770A
Authority: US
Inventors: Charles B Woodworth
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-03-19
Filing date: 1937-03-19
Publication date: 1938-09-13
Anticipated expiration: 1955-09-13

Description

Sept 13, 1938. cQB, wooDwoRTH- l 2,129,806 l 'y l y l LIFTING JACK Filed March 19, 1937 v 2 sheets-sheet 1 NvENToR.

. GMRLEan/OODWORTH Sept. 13, 1938. AB. wooDwRTH 2,129,806

, LIFTING JACK l Filed Maron 19, 1957 2 sheets-snaai 2 CHARLES BWOODWQQTH u INVENTOR.

Patented Sept. 13, 1938 LIFTING JACK Charles B. Woodworth', Port Dickinson, N. Y. Application March *19, 1937, Serial No. 131,770

My invention relates to a lifting jack, and particularly to that type which is adapted to be used in connection with the bumpers or other easily accessible parts of an automobile whereby i the same may be raised from the ground.

The primary object of my invention is to provvide a jack which is simple in construction, of

nufacture, and easy few parts, economical to m to operate.

One important feature of my invention comprises a multi-sided screw shaft distinguished from the common circular typeof screw shaft,

upon which the lifting sleeve travels. More par- 4 ticularly in connection with this feature of the invention, I have provided a s'vcrew shaft provided with fiat sides and corners, such as a square, hexagonal or other multi-sided configuration on which the screw threads for the lifting sleeve are pressed into the corner of the shaft.

Another important object and feature of my invention lies in the provision of a novel lifting sleeve. This method involves the pressing of a fiat piece of metal into circular form and forming threads simultaneously with the pressing operations which enables the lifting sleeve to readily travel up and down the screw shaft as the latter is rotated.

Still another object of my invention lies in the provision of reinforcing means for the formed lifting sleeve and the provision thereon of means by which the part of the car to be raised is engaged.

Another object of my invention lies in the provision of a novel and efcient means for securing the end of the screw shaft to the supporting base.

A further object of my invention lies in the provision of asimple and practical rotating member for the upper end of the screw shaft including also a tool cooperating therewith by means of which the shaft may be quickly and easily rotated.

A still further object of my inventiony lies in the provision of a novel form ber carried by the lifting sleeve for engaging the automobile part 4to( be lifted.

Referring now 'to the figures ofthe accompanying drawings forming a part of this application and wherein like reference numerals indicate like parts:

Figure l is a side view of my improved lifting jacklin operative position and showing the operating tool in effective position.

Figure 2 is a cross sectional view the line 2-2 of Figure 1- taken along length.

of engaging mem- Claims. (Cl. 2511-101) Figure 3 is a detail perspective view of the lifting element which is applied to the lifting sleeve. Figure 4 is a plan view of the operating tool for the screw shaft. v n

Figure is a side view thereof. 5 Figure 6 is a detail view of the upper end of the vscrew shaft with the turning means thereon. Figure 'Iv is a detail vertical sectional view of `vthe lifting sleeve.

Figure 8 is a detail sectional view of the base 10 and attaching means for the lower end of the screw shaft. l

Figure 9 is a detail sectional view of the upper portion of the lifting sleeve showing the reinforcement thereof, taken on the line 9 9 of 15` Figure 7.

Figure 10 is a similar view taken on the line lll-l0 of Figure 7. The reference character l refers generally to the screw'shaft which, in the form shown, is square in cross section although it is to be clearly understood that any other multi-sided form may be used if desired.

This screw shaft is provided at its corners with screw threads 2 for the greater portionvof the length of the shaft.

`In forming the threads in the vscrew shaft l I preferably u se relatively short die members 3 and form the threads therein on a portion only of the length of the shaft at a time, shifting the shaft in the die members after each forming operation until the necessary length of threading on the shaft is provided. This eliminates the necessity for threading dies 3 of the full length of the threaded portion of the shaft-which is generally two orthree feet in lengthand also eliminates the necessity for apparatus for providing the necessary pressure for dies of such The lower end of the screw shaft l is formedy on a slight radius as shown at 5 in Figure 9 and -is-provided 4centrally with a recess 6 adapted to receive with a tightdriving fit a pin l' projecting through an opening 8 providedwthrough the center of the concave shaped top 9 of the sup- '47, porting base I0. Between the lower end of the shaft-I and the top 9 of the base there is provided a hardened steel or bronze washer Il also provided with a central opening through which the pin l passes.

The pin 'l projects'substantially below the top 9 of the base and is provided on its end with a head I2. Between the head l2 and the underside of the top 9 I dispose a rubber gasket or washer I3 of substantial thickness. Disposed between the gasket I3 and the underside of the top 3 is a washer I4 and disposed between the underside Y of the gasket I3 and the head I2 is a washer I5 shaft to function at an angle to its normal verupper end of shaft I will be rotated. There tical position.

The upper end of the screw shaft I is threaded to its extreme end in order to permit the lifting sleeve hereinafter described to be threaded thereon. Y Thereafter the upper end of the screw shaft has pivotally secured thereto as by rivet or pin I6 oppositely disposedl parallel downwardly extending flanges I1 of a bracket overlying the the screw shaft.. This bracket is also provided on its sides opposite the vanges I1 with upwardly projecting supporting parallel flanges I8 between which extends a pivot pin I9 pivotally supporting the lower end of an upi wardly projecting turning member 20 of square, hexagonal, or other multi-sided conguration adapted to receive a suitable tool whereby the is thus provided for the upper end of the screw shaft I a universally jointed means for rotating the shaft. Its flexibility as regards pivoting in both directions with respectfto the shaft simplifies the operation of the turning tool in connection therewith and accommodates lmany conditions of actual use wherein there may be interference of headlights, license plates, etc. in the turning of the shaft.

I have also provided a novel means for rotating the shaft I in cooperation with the turning member 20 comprising a tool having at. one end spaced parallel supporting plates 2I (see Figures 5 and 6) between which is disposed a rotatable ratchet wheel 22 suitably journaled between such plates. The plates 2l are provided with aligned circular openings 23 and the ratchet wheel 22 is provided centrally and i alignment with the openings 23 with an ope g 24 of a configuration similar to the multi-sided turning member 20 whereby upon rotation of the ratchet wheel, the member 2l and the shaft I may be rotated. Y

Pivotally mounted between the plates 2l and adjacent the ratchet wheel 22 is a pawl 25 provided with teeth 23 at either end for engagement -with the teeth of the ratchet wheel 22. This pivoted as at 21 andon its rear side' ,and in alignmentv with the pivot 21 -it is provided pawl 25 is with a projecting member 23 engaging with one end of a coil spring 23, the opposite end of which is secured to a pin 30 provided between the plates 2I. Depending upon the direction in which it is desired to rotate the ratchet wheel 22', the pawl 25 is rocked on its pivot by the operator to bring one or the other of the teeth 26 into engagement with the ratchet wheel and in such position the turning of the plates 2i carrying these parts results in the pawl turning the ratchet wheel 22 in one direction and permits the return of the plates 2l to the original turning point by means of the engaged tooth 26 riding idly over the teeth 'v 22 on such return movement. Thus the turning can be turned a limited amount, depending upon the conditions underl which it is being operthreads 2 of the shaft I.

-the jack or when the same is left in position on the jack. Ihave provided the rear ends of the plates 2| with side flanges 3| and I have also provided a handle member- 32 provided at its sides with flanges 33 adapted to engage with the ilanges'3i on their outer surfaces, and a pivot pin 34 is provided extending through both the flanges 3| and 33 whereby to provide a hinge for the handle portion 32. Thus the handle member 32 maybe pivoted upwardly or downwardly to best accommodate the conditions under which the jack is being used and when not in use, vthe handle member 32 is hinged -downwardly alongside the shaft I for convenience.

'I'he lifting device for engaging the bumper or other part of the automobile by means of which the car is to be raised, comprises an internally threaded sleeve 35, the threads of which are adapted to engage in screwing action .with the That is, the internal threads 36 of vthis lifting sleeve-should have their under surfaces horizontal and their upper surfaces inclined. (See Figure 8.)

The sleeve 35 is formed also by a pressing oper,

ation and from a flat piece of metal (see Figure l0) Awhich by suitable means to be described isl formed into a circular sleeve and provided with the threads 33 pressed thereinto.

In constructing the lifting sleeve or member for. actual use on the shaft I, two of the sle ves formed as just described, are provided in sp ed relation and are secured together by welding into a casing member 41 which substantially encloses said sleeves. This casing is provided on one side with two parallel outwardly projecting lips 43 (see Figure 8) which may be formed by cutting and bending the material of the casing 41 outwardly. It is to be noted, particularly with reference to Figures l2 and 13, that the securing of the casing 4I to the sleeves 35 is vdone in a manner to bring the lips 48 of the casing opposite the seam or welded abutting edges of the lower sleeves 35 and adjacent the seam or welded abutting edges of the upper sleeve 35. 'I'his is for the purpose of bringing the load to be lifted by the lips 43 more directly upon the unseamed or unfastened `portion of the sleeves.

The lips 48 are provided adjacent their outer ends with tapered openings 49 adapted to receive .the tapered stem 50 of a lifting lug suitably secured as at 3i to a bumper bar 52 or other fixed portion of the automobile.

Obviously, if desired, the lips 43 may be otherwise formed, as in hook'formation, to engage the bumperbar or other element in the usual manner.

It will thus be seen that I have provided a simplified easily operable lifting jack of the type may be made in details of construction andarrangement of parts without departing from the spirit and scope of my invention. I do not limit myself, therefore, to the exact form herein shown and described other than by the appended claims.

I claim:

l. A lifting jack comprising a screw shaft and a lifting member thereon, a base to which the lower end of said shaft is secured, resilient means for securing said end to said base whereby said shaft may be tilted with respect to said base withshaft comprising formed threaded members se.

cured together in spaced relation, said members comprising threaded formed metal pieces having their free edges secured together and having said secured edges disposed opposite the points of greatest load on said nut.

3. A lifting jack comprising a screw shaft hav-V ing a pivoted member thereon by which the shaft is turned, and a lifting nut on said shaft coinprising formed threaded members secured together in spaced relation, said members comprising threaded formed metal pieces having their free edges secured together and having said secured edges disposed opposite the points of greatest load on said nut.

4. A lifting jack comprising a screw shaft and a lifting member thereon, a base to which the lower end of said shaft is secured, means for securing said end to said base whereby said shaft may be tilted with respect to said base without distortion thereof, said connecting means comprising a headed pin having a tight driven fit in said shaft and projecting below said base.

5. A lifting jack comprising a multiple sided screw shaft of solid metal having a pivot member thereon by which the shaft is turned and a` lifting nut on said shaft comprising threaded members secured together in spaced relation, 'said members comprising threaded formed metal pieces having their free edges secured together and having said secured edges disposed opposite the points of greatest load on said nut.

CHARLES B. WQODWORTH.