High capacity hand portable jack

Details High capacity hand portable jack High capacity hand portable jack

1975-04-30

1976-07-06

Smith, Al Lawrence

Implements or apparatus for applying pushing or pulling force

Hoisting truck

Single throw lever

B66F 324

Patent

active

039678148

ABSTRACT:
A high capacity portable jack which has a chassis consisting of front and rear axles supported on small wheels with parallel laterally spaced tension members connected to and extending between the axles. A jack having a lift arm connected directly to the rear axle and a hydraulic unit pivoted at the rear generally centrally of the lift arm and directly connected at the forward end to the front axle to subject the tension members only to a force tending to stretch the tension members to thereby require only lightweight tension members when the hydraulic unit is operated to raise the jack and lift an object with the saddle at the forward end of the jack.

REFERENCES:
patent: 1844585 (1932-02-01), Manley
patent: 2032309 (1936-02-01), Rechard
patent: 2080963 (1937-05-01), Fiedler
patent: 2404577 (1946-07-01), Jackson
patent: 2906497 (1959-09-01), Wolf
patent: 3807694 (1974-04-01), Butorac

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