Jack stand

Details Jack stand Jack stand

1994-09-20

1995-10-31

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Hoisting truck

Single throw lever

254 1, 254133R, 254DIG1, B66F 500

Patent

active

054622573

ABSTRACT:
A jack stand for supporting a lifting jack beneath a work piece to be raised or lowered. The jack stand includes a base movable along a floor surface, and a jack support platform supported in elevated relation above the base. Struts are pivotably connected to the jack support platform and extend downwardly to engage the base, transferring a portion of the weight of the jack to the base. Those support struts are displaceable when the base is positioned beneath an interfering machine structure, allowing that structure to fit within the open space between the base and the jack support platform, so that the jack stand can fit beneath a work piece notwithstanding the interfering structure.

REFERENCES:
patent: 137602 (1873-04-01), Edwards
patent: 2409495 (1946-10-01), Kelley
patent: 2751191 (1956-06-01), Schroeder
patent: 2814394 (1957-11-01), Witcher
patent: 3829063 (1974-08-01), Holzworth
patent: 3834669 (1974-09-01), Reid
patent: 3902699 (1975-09-01), Brackett
patent: 3937443 (1976-02-01), Durgan
patent: 4336921 (1982-06-01), Wienhold
patent: 4479634 (1984-10-01), Blatz
patent: 5033717 (1991-07-01), Symon

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