Rack type jacking apparatus

Details Rack type jacking apparatus Rack type jacking apparatus

1976-04-02

1976-11-30

Smith, Al Lawrence

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

Pawl actuated

B66F 108

Patent

active

039944751

ABSTRACT:
A jacking apparatus comprises a rail with an attached vertical rack having teeth with a steep front face and a sloping back. A notch is arranged in the back of each of the rack teeth. A pair of cars are slidably mounted on the rail with each car carrying a pair of latches, one of which is engageable with the front face of a rack tooth and the other with the notch in the back of that tooth. Reciprocal motion, away from and toward each other, is imparted to the cars while the latches selectively engage teeth in the rack to cause progressive incremental travel of the cars along the rail, to move a load attached to one of them.

REFERENCES:
patent: 2043141 (1936-06-01), Wilmesherr
patent: 2437078 (1948-03-01), Crane
patent: 3273859 (1966-09-01), Walli

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