Elevator bridge with columns

Details Elevator bridge with columns Elevator bridge with columns

1975-06-12

1976-10-12

Love, John J.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 854, 187 859, B66F 700

Patent

active

039852075

ABSTRACT:
A lift mechanism having vertical columns and including manually positionable load supporting arms which may be manipulated so as to engage a raised load thus permitting lowering of the lift. The lift mechanism is further characterized by a safety system which prevents operation of the lift unless the load supporting arms are all fully retracted from the path of the lift or all fully extended under the load. The safety system includes kinematically coupled latch members which move with the lift and engage apertures of vertically spaced arrays located in each support column of the lift.

REFERENCES:
patent: 2059059 (1936-10-01), Thompson
patent: 2139597 (1938-12-01), Martin
patent: 2238573 (1941-04-01), Steedman
patent: 2593635 (1952-04-01), Walker
patent: 2843223 (1958-07-01), Villars
patent: 3117652 (1964-01-01), Wallace
patent: 3291260 (1966-12-01), Woor et al.
patent: 3724602 (1973-04-01), Hernick
patent: R25923 (1965-12-01), Powell

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