US2328483A - Lifting apparatus - Google Patents

Description

Aug. 31, 1943. H. NILSON 2,323,483

LIFTING APPARATUS Filed June 7, 1941 F/QZ H AVVEN roe Maeoz 0 N/wo/v A 7- TOENE Vi Patented Aug. 31, 1943 LIFTING APPARATUS Harold Niison, VVayzat-a, ltIimL, assignor to George H. Ische, Milwaukee, Wis.

Application June '7, 1941, Serial No. 397,027

2 Claims. (Cl. 60-52) This invention relates to new and useful improvements in pressure devices and more particularly to such apparatus of the hydraulic type.

Pressure devices or jacks of the character herein disclosed, must sometimes be positioned in.

such a manner under a load that it is difficult to operate the usual operating handle thereof, because of lack of sufiicient room to swing or manipulate the handle. It is therefore highly desirable that the operating handle be so mounted on the body of the apparatus that it may be quickly swung to a position where it may be operated without interference from the load or other objects, whereby the usefulness of the apparatus is greatly extended.

An object of the present invention therefore is to provide an apparatus of the character disclosed comprising an operating handle which is mounted for rotary adjustment with respect to the body of the apparatus or jack, in substantially a horizontal plane, whereby the operating handle may be positioned in such a manner that it may be conveniently operated, regardless of the type of work upon which the apparatus is used.

A further object is to provide a hydraulic jack comprising a body having a fluid chamber therein, a cylinder and ram also being mounted on said body and provided with a fluid pump for controlling the circulation of the fluid to and from the ram, and saidpump having an operating handle mounted for oscillatory movement to actuate the pump, and means being provided whereby the handle may be rotatably adjusted about the axis of the pump to facilitate positioning the handle when operating the jack.

Other objects of the invention reside in the simple and inexpensive construction of the means for adjustably supporting the operating handle on the jack body; in the uniquie manner of mounting the pump cylinder in the jack body, whereby a portion thereof projects from said body to provide a support for a handle supporting collar, and whereby the handle is adapted for rotary adjustment with respect to the jack body; in the means whereby the handle supporting collar may readily be locked to its support to prevent rotary adjustment of the handle; and, in the threaded connection between the handle supporting collar and the upper end of the pump, which serves to minimize play or relative axial movement of the collar on the pump, when operating the pump handle.

Other objects of the invention will appear from the following description and accompanying drawing and will be pointed out in the anneXed claims.

In the-accompanying drawing there has been disclosed a structure designed to carry out the various objects of the invention, but it i to be understood thatthe invention is not confined to the exact features shown as various changes may be made within the scope of the claims which follow.

In the drawing:

Figure l is a side elevation of a jack showing the invention embodied therein;

Figure 2 is a sectional plan view on the line 22 of Figure 1, showing the split collar for supporting the handle;

Figure '3 is a plan view of Figure 1, showing the adjustability of the handle; and

Figure 4 is a View showing a modified construction.

In the selected embodiment of the invention here shown, there is illustrated in Figure 1, for purposes of disclosure, a pressure or lifting apparatus in the form of a hydraulic jack, comprising a body 2 having a fluid chamber 3 therein and provided with a ram 4. A suitable fluid operated pump, generally designated by the numeral 5, is shown mounted in the upper portion of the wall 6 of the body 2, and has a threaded portion 1 received in threaded engagement with a correspondingly threaded opening 8 provided in the wall 6. The pump 5 has a piston 9, the upper end ll of which projects from the upper end of the pump cylinder, as clearly illustrated in Figure 1. The pump has an operating handle l2.

An important feature of the present invention resides in the means provided for supporting the operating handle [2 of the pump, whereby said handle may be rotatably adjusted in substantially a horizontal plane, with respect to the body 2 of the jack. To thus support the handle [2, an annular member or collar [3 is mounted on the projecting upper end portion M of the pump cylinder, as shown in Figure 1. The upper end portion of the cylinder is preferably threaded, as shown at I, and the annular member or collar I3 is received in threaded engagement with the threads of the cylinder. The collar I3 is normally positioned as shown in Figure 1, wherein a slight clearance is provided between the lower face of the collar [3 and the adjacent wall 6 of the jack body 2, and a similar clearance is provided between the upper face of the collar I3 and the lower face of the head I5.

The operating handle 12 is shown having one end received in a socket member l6, pivoted to the upper end of the pump piston 9 and having a pivotal connection with a link H by means of a pivot pin IS. The lower end of the link I1 is pivotally connected to the collar l3 by a pin I9, as best shown in Figure 1. By thus pivotally connecting the operating handle to the pump piston 9 and the collar l3, the pump piston may readily be actuated to operate the pump by swinging movement of the operating handle I2 in a vertical plane. It will also be noted that by means of the collar H, the operating handle may readily be rotatably adjusted about the axis aa of the pump, as shown by the full and dotted lines in Figure 3. By thus adjustably ,mounting the pump handle on the jack body,

the usefulness of the jack may be greatly extended, because it is usually possible to so position the pump handle that it may be conveniently operated, regardless of the position of the jack body with respect to the load.

The threaded engagement of the collar 13 with the upper end of the pump cylinder '1 minimizes wear and play between the collar and pump cylinder. In some instances, it may be desired to fixedly secure the collar 13 to the upper threaded portion of the pump cylinder.. To thus secure the collar i3 in fixed position upon the pump cylinder 1, the collar is shown split, as indicated at 20 in Figure 2, and a suitable clamping screw 2| is mounted in projecting ears of the collar, whereby the clamping member may be contracted to grip the threaded portion 1 of the pump cylinder to secure it against relative rotation thereon.

In Figure 4, I have shown a handle supporting means of slightly different construction, wherein the upper projecting end portion 22 of the pump cylinder is unthreaded or cylindrical in form and is adapted to receive a collar 23, shown provided with an upstanding arm 24 to which the socket member i6 is pivotally connected by a pivot pin 18, in a manner similar to the construction shown in Figure 1. In the form shown in Figure 4, the upper end of the pump piston 9 is shown provided with a transverse pin 25, the end portions of which are adapted to .be engaged by forked lugs 26 provided on the socket member 16, as shown. In the form shown in Figure 4, the collar 23 is loosely supported on the cylindrical portion 22 of the pump cylinder, and is free to rotate about the axis a a of the pump cylinder in a manner similar to the construction shown in Figures 1, 2, and 3.

The novel jack herein disclosed has been found extremely useful in industrial plants where pressure is to be applied to various kinds of work, such as in straightening heavy beams, automobile frames, andthe like. In the performance of such operations, a greater range of work may be accomplished when it is possible to operate thejack in a horizontal position, or even in an inverted position, which is made possible by the novel mounting of the operating handle, as herein shown. The rotary adjustment of the pump handle has also been found very desirable in automobile jacks, because it makes it possible to swing the handle to a position to clear fenders or other objects, after the jack has been operatively positioned under the vehicle axle or other part of the vehicle to be lifted.

In the present application, I have shown the operating handle applied to the pump piston of a hydraulic jack. It is to be understood, however, that the invention may be applied to mechanical jacks or other devices of this general character, where applicable, without departing from the scope of the invention.

It will be apparent to those skilled in the art that I have accomplished at least the principal objects of my invention, and it will also be apparent to those skilled in the art that the embodiments herein described may be variously changed and modified, without departing from the spirit of the invention, and that the invention is capable of uses and has advantages not herein specifically described; hence it will be appreciated that the herein disclosed embodiments are illustrative only, and that my invention is not limited thereto.

I claim as my invention:

1. In an apparatus of the class described, a body having a ram mounted for reciprocal movement therein, a pump comprising an externally threaded cylinder mounted in said body, said pump controlling the circulation of a pressure fluid to and from the ram, an operating handle for the pump, and a split collar received in threaded engagement with the cylinder adapted to support said handle, the threaded connection between the collar and cylinder permitting rotary adjustment of the handlea-bout theaxisof the pump, and also permitting axial adjustmentof the collar on the pump cylinder,- thereby to vary the working stroke of the handle with respect to the ground. 7 v I 2. In a jack of the class described, a body having a fluid reservoir therein, a ram, a pump mounted in said body for circulating the fluid to and from the ram, said pump being supported in an opening provided in a wall of said body and having aportion projecting from said wall, a collar threadedly engaged with theprojecting portion of said pump and adapted for rotary adjustment thereon, anda pump operating handle mounted on said collar wherebythe handle may be rotatably adjusted about the axis o f th e pump to position it for convenient operation, said collar being split whereby it may be locked in adjusted position. H V

HAROLD NILSON.

Images