Frame-type car jack

Details Frame-type car jack Frame-type car jack

1995-09-15

1997-02-18

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Hoisting truck

Single throw lever

254 93H, 254124, B60P 148

Patent

active

056034865

ABSTRACT:
An improved frame-type, manually-operated hydraulic car jack consists of a base, a pressure release valve, a socket, a lever, a hydraulic oil cylinder, a piston, a pair of pulling bars, a pair of links, a pair of pushing bars, a load-engaging head and a locking rod. A pair of horizontally aligned holes which have a diameter slightly larger than that of the locking rod are defined in the pushing bars. When the car jack is driven to lift a car supported by the car jack to a desired level, the locking rod is inserted into and extended through the holes on the pushing bars thereby to prevent an unintentional lowering of the car jack and the car.

REFERENCES:
patent: 3806093 (1974-04-01), Itazu
patent: 3891108 (1975-06-01), Traficant
patent: 4241899 (1980-12-01), Kaneko
patent: 4749169 (1988-06-01), Pickles
patent: 5016858 (1991-05-01), Mitchell
patent: 5029814 (1991-07-01), Liegel et al.
patent: 5211375 (1993-05-01), Wang
patent: 5433127 (1995-07-01), Messier

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