US1501605A - Lifting jack - Google Patents

Description

G. LANE LIF'IING .mcx

July 15 1924.

Filed Dec. 29. 1923 Qwuanloa fiearje Lane aw; MM

Patented July 15, 1924.

UNITED STATES GEORGE LANE, OF POUGHKEEPSIE, NEW YORK.

LIFTING JACK.

Application filed December 29, 1923. Serial No. 683,473.

T all whom it may come m.

Be it known that I, GEORGE LANE, a citizen of the United States, and a resident of Pouglikeepsie, in the county of Dutohess and State of New York, have invented certain new and useful Improvements in Lifting Jacks, of which the following is a specification.

The present invention is a continuation in part of and contains claims divided out of a prior application filed by me in the United States Patent Oflice on the 19th day of March, 1923, Serial Number 626,205. The present application concerns more particularly the handle construction and the invention aims to provide a hand lever for jacks which shall be of sufficient length to enable the ready placement of the ack and its easy operation, which can be easily and quickly folded to permit its insertion in a tool box, and yet which, in use, will be strong and rigid.

The invention further aims to provide such a hand lever or handle having locking elements for firmly holding the handle sections in folded or extended position, which locking elements are permanent parts of the handle sections or members and can be manipulated by stresses applied to said handle members at right angles to the plane of action of said lever.

The invention also aims to provide a folding handle, the members of which may be held at an angle to each other when desired, as for instance when operating over uneven ground or under other conditions where it might not be possible with a straight handle to push it down sufficiently to enable the pawls to properly engage the lifting bar.

lVith these and other objects in view, the invention includes the novel features of construction and arrangement and combination of parts hereinafter described, the nature and scope of my invention being defined and ascertained by the claims appended hereto.

hat I at present consider the best embodiment of my invention is illustrated in the accompanying drawings in which:

Figure 1 is a side elevation of a complete jack with the handle in jack operating position and with the handle shown in straight and angular positions by full and dotted lines respectively.

Fig. 2 is a detail showing the handle in edge View.

Figs. 3, l and 5 are views illustrating a slight modification.

Referring by reference characters to these figures, the jack proper may be of any desired construction, adapted to be operated by the pumping action of the hand lever or handle, that shown in the drawings being the one which forms the subject of the application above referred to and being of the reversing type. It comprises briefly a base 1, standard 2, lifting bar 3, and handle receiving socket lever 9 adapted to detachably receive the hand lever extension 10. The pumping action of the handle, through pawl mechanism not shown herein, actuates the lifting bar, and the reversal of the jack is effected by a rocking plate connected by link 21 to the handle member 10 and operated by longitudinal movement of said member in its socket, all as fully set forth in my application aforesaid.

In order to make the handle extension long enough to enable it to be used to place and remove the jack and to facilitate the raising of heavy loads, and also that it may be folded up to fit within the ordinary tool box, I provide an extension member 10 articulated to the member 10 by a transverse pivot pin or bolt 25 passing through alining open ings in the overlapping parts. 7 The pivot pin is made longer than the combined thickness of the two handle members, and the projecting portion of the pin is surrounded by a coil spring 26, confined between a head on the bolt and the outer face of member 10 so that the spring tends constantly to press the two members 10 and 10 together. The pivot opening in member 10* is positioned some little distance from the inner end thereof (left hand end, Fig. 2) and said member 10" is provided with two holes or recesses 10 and 10, on opposite sides of and equi-distant from the pivot pin, which are designed to alternately engage with a looking projection 10 on member 10, according to whether the handle is in folded or unfolded position, thus locking the parts firmly in either of these positions.

By holding the section 10, for example, rigidly, and applying pressure to the member 10 in the proper direction, as indicated by the arrow, Fig. 2, the member 1O Will fulcrum on the end of member 10 and the locking projection will be disengaged from its recess, the spring 26 yielding to permit such movement. The extension member 10 may then be swung around on pivot pin 25 to the proper position. It will thus be seen that the spring 26 serves normally to keep the projection 1O in looking engagement with either recess 1O or 10", but yields to permit the disengagement and re-engagement thereof.

If an angular upward deflection of the extension member 10 is desired to produce a bent handle efiect, the pin 10 may be brought to bear on the upper edge of the inner or left hand end of the extension, as shown in Fig. 2 in dotted lines, and in such position can be used to manipulate the jack effectually, as the weight of the load on the lifting bar tends to keep the handle raised.

In some cases a wider range of angular adjustment may be desired. In such cases I provide the member 10 with two holes 6 and b, one located above the other, the projection 1O being positioned correspondingly nearer the lower edge of the bar, so that with the lower hole b in engagement with the projection, the handle extension is locked in straight position, as shown in Fig. 1, while with the upper hole I) in engagement with the projection the handle extension is locked in angular position as shown in Fig. 4:, and with the top edge of the end of the extension bearing against the under face of the projection a still further angular adjustment is secured, as shown in Fig. 5.

Having thus described my invention, what I claim is:

1. A folding handle for lifting jacks com prising a pair of handle members having overlapping parts provided with alining openings, a pivot pin passing through said openings and having a head spaced from one of said members, and spring means interacting between said head and said last named member tending to keep said members pressed against each other, one of said members having a projection spaced from said pivot pin and the other a locking recess to receive said. pin.

2. A folding handle for lifting jacks comprising a pair of handle members having overlapping parts provided with alining openings, a pivot pin passing through said openings, a spring encircling said pivot pin and normally pressing said members together, one of said members having a projection spaced from the pivot pin and the other, a locking recess to receive said projection.

A folding handle for lifting jacks comprising a pair of handle members having overlapping parts provided with alining openings, a pivot pin passing through said openings, a spring encircling said pivot pin and normally pressing said. members together, one of said members having a projection spaced from the pivot pin and the other a pair of recesses equally spaced on opposite sides of said pivot pin to selectively receive said projection to lock the members in folded or unfolded position.

4-,. A folding handle for lifting jacks comprising a pair of handle members having overlapping parts provided with alining openings, a pivot pin passing through said openings and having a head spaced from one of said members, and spring means interacting between said head and said last named member tending to keep said members pressed against each other, one of said members having a projection spaced from the pivot pin and the other a pair of overlying recesses to selectively receive said projection.

In testimony whereof, I aflix my signature.

GEORGE LANE.

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