US1975969A - Suspension means for lifting jacks - Google Patents

Description

Oct. 9, 1934. R. NELSON SUSPENSION MEANS FOR LIFTING JACKS Filed NOV. 1952 Patented Oct. 9,

PATENT QFlCE SUSPENSION MEANS FOR LIFTING JACKS Robert Nelson, New Dayton, Alberta, Canada, as-

signor of one-fourth to Theodore R. Reece, Lethbridge, Alberta, Canada Application November 1, 1932, Serial No. 640,727

2 Claims.

This invention relates to suspension means for lifting jacks, the principal object of which is the provision of means whereby a lifting jack may be primarily supported with the cap of the plunger in contact with the member to be lifted while the body portion of the lifting jack is suspended above the ground, floor or other contacting area, so that upon operation of the lifting jack, the base or body portion thereof will descend into contact with the contacting area.

A further object of my invention is the provision of a suspension means for lifting jacks which will adequately support a lifting jack and which may be conveniently engaged with the member to be lifted.

With the foregoing and other objects in View, as will appear as the description proceeds, the invention consists of the novel construction, combination and arrangement of co-operating elements as hereinafter more specifically set forth claimed and shown in the accompanying drawing forming a part of the present application, in which:-

Figure 1 is an elevation View of a conventional lifting jack showing the improved suspension means in combination therewith and suspending the lifting jack from a motor car axle housing.

Figure 2 is a top plan view of the suspension means, the conventional lifting jack and the motor car axle housing being omitted.

Referring to the drawing, 5 designates a conventional lifting jack which has a plunger portion 6 provided with a suitable cap '7 adapted to contact benea h the object which is to be lifted. The suspension means comprises a unit 8 which is provided with a holding portion made up of semi-annular portions 9 and 10 which are adapted to be clamped around the plunger 6 below the cap 7 and suitably tightened thereon by means of the bolt 11 and nut 12. The unit 8 is divided into spaced members or supports 13 which extend rearwardly and upwardly and are united at their upper extremities by an angular bar 14.

15 is a jaw formed of spaced curved members 16 and 17 which are spaced above and pivotally attached to the supports 13 intermediate thereof by means of rivets 18. Said jaw is curved to such a degree that it substantially surrounds the member to which it is applied. The members 16 and 1'7 are retained in fixed spaced relationship to each other by means of rivets 19 and 20. 21 is a coil spring attached at its upper end to the rivet 20 and at its lower end to a headed lug 22 which is preferably formed integral with the unit 8. 23 is a guiding member comprising a roller bearing rotatably supported between the forward extremities of the members 16 and 17.

When it is desired to apply the suspension means to an axle housing or the like 24, the jaw 15 may be swung to the position as shown in dotted lines in Figure 1 until it contacts with the bar 14 of the suspension means. When the jaw 15 is in this position the rivets 18 will be in advance of a straight line described through the rivets 20 and the lug 22 and consequently the spring 21 will retain the jaw 15 in this position. The suspension means may be straddled, over the axle housing 24 and the lower extremity of the jaw 15 pressed against the housing with sufficient force to cause the jaw 15 to pivot on the rivets 18 until the centre line of the spring 21 is in advance of the rivets 18. The spring, 21 will then contract and draw the jaw 15 into" closed position to contact with the axle housing. When it is desirous of removing the suspension means from an axle housing or the like, pressure may be exerted downwardly or forwardly on the lifting jack and the jaw portion 15 will be swung rearwardly by the roller bearing 23 contacting with the axle housing until the centre line of spring 21 is behind the pivots 18 again and then the jack may be conveniently withdrawn from beneath the vehicle.

It is not necessary to cock the jaw 15 before applying it to an axle housing or the like since the said jaw, due to roller bearing 23, will ride over the housing or the like as the suspension means is advanced towards said housing or the like.

The foregoing specification and annexed drawing disclose a preferred embodiment of the invention but it is to be understood that minor changes may be resorted to in the conventional adaptation U of the invention as hereafter claimed.

What I claim as new is:

1. A suspension means for a lifting jack adapted to suspend said lifting jack from a member to be lifted, comprising a holding portion engageable with said lifting jack, said holding portion being in the form of a resilient steel strap with orifices at its free ends to receive means for drawing said ends together, spaced upcurving members joined to said holding portion united at their upper extremities by an angular bar portion, a clamping jaw composed of spaced apart curved members extending above and pivotally connected to said spaced upcurving members, said angular bar portion acting as a 2. A suspension means for a lifting jack adapt- I ed to suspend said lifting jack from a member to be lifted, comprising a holding porti0n,en-

gageable with said lifting jack, said holdingp'drtion being in the form of a resilient steel strap U with orifices at its free ends to receive means for drawing said ends together, spaced upcurving members joined to said holding portion, a clamping jaw composed of spaced apart curved members extending above and pivotally connected to said spaced upcurving members, said clamping jaw being curved to such a degree that it substantially surrounds the member to which it, is applied, a; guiding member atlthfree end of said clamping jaw in the form of a roller bearing inserted between said spaced apart curved members forming said clamping jaw to facilitate the application and removal of said jack to or from the member to be lifted, and spring means for urging said clamping jaws to embrace a member from which said lifting jack

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