Lift

Details Lift Lift

1983-10-14

1985-08-13

Schmidt, Frederick R.

Implements or apparatus for applying pushing or pulling force

Hoisting truck

Single throw lever

182 63, 182141, 254122, 254127, B60P 148

Patent

active

045345449

ABSTRACT:
A lift consists of a platform that the article to be lifted rests on and a scissors jack that is attached to the bottom of the platform and that can be spread up out of an extended position with rollers. One pair of the parallel scissoring legs of the jack is firmly articulated with the platform and the other pair of scissoring legs is attached to a shaft that travels parallel to the bottom of the platform inside a guide mounted on it. Rollers are mounted on a rigid axle and the axle is engaged by two chains that wrap around chain wheels rigidly attached to the shaft and which are connected to a transverse beam. The front end of the transverse beam is connected to a tensioning device that operates parallel to the platform. Two independently rotating rollers are mounted on the axle on each side of the jack, each roller rests against an auxiliary rail and a guide rail on each inside scissoring leg and the auxiliary rails are inside the jack. One end of each auxiliary rail is mounted on the shaft and the auxiliary rails and guide rails are about half as long toward the free ends of the scissoring legs as the section of scissoring leg that extends from the center to the free end of the scissoring parts.

REFERENCES:
patent: 1942945 (1934-01-01), Smith
patent: 3282566 (1966-11-01), Clarke
patent: 3743344 (1973-07-01), Jameson
patent: 3785462 (1974-01-01), Coad et al.

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