Low profile lift apparatus with one to one direct lifting ratio

Details Low profile lift apparatus with one to one direct lifting ratio Low profile lift apparatus with one to one direct lifting ratio

2006-07-04

2006-07-04

Watson, Robert C. (Department: 3723)

Implements or apparatus for applying pushing or pulling force

Fluid pressure

Vehicle attached

C254S01000C

Reexamination Certificate

active

07070167

ABSTRACT:
A lifting apparatus comprising: one of a mobile/or and stationary base; a lift platform having a geometric first center, the lift platform movable relative to the base from a lowered position to an upper position; a linkage or linkage mechanism interconnecting the base and the lift platform for guiding the base and the lift platform to stay in a generally mutually parallel relationship as the lift platform moves relative to the base; the base, lift platform and linkage configured so that when the lift platform in its lowered position the first center intersects the base at a first point and with the lift platform in its upper position the first center intersects the base at a longitudinally off-set second point; and a fluid (fluid/pneumatic) control spring operatively mounted between the lift platform and the base, for controllably lifting and lowering the lift platform.

REFERENCES:
patent: 4560145 (1985-12-01), Widmer
patent: 6871364 (2005-03-01), Leoutsakos

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