US1471695A - Auto lift - Google Patents

Description

Oct. 23, 1923.

E; H. KELLEY ET AL AUTO LIFT Filed March 51. 1922 2 Sheets-Sheet 1 I WITNESSES A TTOR/VEYS Oct, 23,1923. 1,471,695, E. H. KELLEY ET AL A TTORNEYS Patented Qct. 23, 1923. i

s'rras EMMOB- HAMILTON KELLEY- AND GEORGE 1 lanes PATENT QFFrcE.

ALvA'sTEwART, an, or soUTH Bnow s VILLE, PENNSYLVANIA.

AU O Application filed March 31,

' ing to the lever arrangement and simplicity of construction.

Another object is to provide such a lift or jack which is adapted to give quick and ef fective action with the application of the least amount of energy.

Other objects and advantages of the invention reside in certain novel features of construction, combination and arrangement of parts which will be hereinafter more fully described and claimed, reference being had to the accompanying drawings, in which- Figure 1 is a side elevation of the device shown in its extreme operative position,

Figure 2 is a similar view showing the device in inoperative pbsitionwith thelever extendedupwardly to serve as a handle to push the device into and out of engagement with the work,

Figure 3 is a top plan perspective view of r the device,

Figure 4 is a detail view of the aXle saddle or support member, and,

Figure 5 is a detail perspective view of one of the operating levers or handles.

As shown in the drawings, the base rails 1 are spaced apart and rigidly connected together by the front and rear cross tie bars 3 and 4 respectively, forming'a base frame for the jack or lift. This base frame is preferably composed of units of angle irons as shown but it is to be understood that any suitable construction may be employed to give strength to the base frame.

Two similar upright supports 5 are rigidly-secured at their lower ends to the front end of the base as shown and are braced by the bracing irons 7 respectively. Lifting bars 9 forming a tiltable platform are pivotally connected to the upper portions of up- 7 rights 5 by bolts 11,

LIFT.

192;. Serial No. 548,459.

Each of the supportingbars is provided with an axle saddle or supporting member as indicated by reference numeral'13f These axle saddles may be formed of sheet metal and are stepped as at for adjustment purposes.

Toggle links 16 and 17 are pivotally connected at their'overlapping ends to each other by means of the pins 18, and are in turn pivotally connected at their outer ends to the base at 19 and to the lifting bars as at 20 respectively so that the lifting bars may be swung into and out ,ofengagement with the objectto be lifted, by merely swinging the links upon the center pin 18.

The. swin of the. links is accomplished by means of handles or operating levers 21 which, as shown in Figure 5, are preferably formed of two strips of stout metal clamped together by rivets. The rear or outer ends of the levers are substantially straight forming convenient handles for moving the device about the floor, but the front or inner extrem, ities 22 which are spaced apart, are curved to allow the handles to assume a. proper operative position when the lifting bars are down. The curved extremities 22 are pivotally connected at their front ends to the lifting bars.

9 by means of the bolts 20.-

The operating levers 21 have. a rigid ex: tension 24 riveted between its sections as shown and extending forwardly in substantial alinement with the handle portion. This extension not only serves as a support for the lifting bars 9, when they are tilted into operative position, but also acts as a lock in holding the pivot point 18 slightly past a dead center or an imaginary line drawn from bolts 19 to 20, thus forming an effective support for the bars 9.

Horizontally elongated vertical openings areformed in the levers 21 as indicated at 23, Figure 5, so that the levers will fit over the corners of the vertical flange of the base ironsl locking the lever and toggle links in position and at the same time brace the levers against lateral movement.

In order that the device maybe easily transported from place to place we provide rollers or casters 25, at the front and rear ends of the base rails 1.

In use, the device is moved under the work to be lifted, as, for instance, an automobile. When the levers 21 are moved downwardly on their fulcrum at 20, the extensions 24 which are carried by the levers and connected to the overlapped ends of the toggle links at their point of connection by the same pivot pin18, swing with the leversand moving forwardly and upwardly engagethe bars 9 and forces the pivot points 19 and QO further apart. In this way the platform is caused to engage the work in one of the steps 15 and lift it.

It should be noted that the point 18 will move slightly past a dead center on an imaginary straight line drawn from the centers of pivots 19 and-20. In this manner the supporting bars are securely held or locked in place.

It is to be understood that various changes in the size, shape, and arrangement of parts of our invention may be resorted to without departing from the spirit'of the invention or the scope of the claims.

We claim 1. A lifting device comprising a supporting rail, a tiltable member carried on said rail, means carried by the tiltable member for engaging an object to be lifted and means for tilting the tiltable member, said means including a swinging lever bar pivot- .ally connected at one end to the tilta-ble member, and provided with a forward ex tension to le links connectin the tiltable member and the supporting rail, saidtoggle links being connected at their junction to the said extension of the swinging lever bar.

2. A jack comprising a base, a tiltable member pivoted thereto, toggle links connected at their outer ends to the base and tiltable member and having their adjacent ends pivotally connected, and a bent lever bar connected at its bent end to said tiltable. member and having a forward extension pivoted to the adjacent ends of said links porting rail pivotally connected at its front endto said standard, toggle links pivotally connected at their outer ends to said base rail and supporting rail adjacent their rear ends, said toggle links pivotally connected at their inner ends, a bent lever pivotally connected at its bent end to said supporting rail adjacent its rear end, said lever having a rigid extension projecting forwardly at the bend thereof, said extension pivotally connected to said toggle links at their junction, the forward end of said extension adapted to engage the supporting rail and hold the same in its elevated operative position.

4. A jack comprising a base rail, a rigid standard at its front end, a lifting and supporting rail pivotally connected at its front to said standard, toggle links pivotally connected at their outer ends to the base and supporting rails respectively, and pivotally connected together at their inner ends, a bent lever pivotally connected at its bent end to the lifting rail, a rigid extension projecting forwardly from said bent lever at its bend, said extension pivotally connected forwardly of the bend to the toggle links at their junction, the forward end of said extension adapted to engage the lifting rail and hold same in its elevated operative position, said lever having an opening intermediate its ends adapted to fit over the rear end of the base rail and lock the lever against longitudinal and lateral movement.

EMMOR HAMILTON KELLEY. GEORGE ALVA STElVART, J12.

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