Automatic drawbridge for elevator

Details Automatic drawbridge for elevator Automatic drawbridge for elevator

1979-11-19

1981-11-24

Spar, Robert J.

Material or article handling

Elevator or hoist and loading or unloading means therefor

Separable rack

414661, 414539, 187 98, E04H 606

Patent

active

043021450

ABSTRACT:
A drawbridge assembly on an elevator car which is responsive to movement of an automatic cart loader and unloader for its extension and retraction. The drawbridge compensates for expected positional variations in indexing of the elevator to a selected landing. An associated clutch permits manual deployment of the drawbridge during a power failure or other malfunction.

REFERENCES:
patent: 1152012 (1915-08-01), Doren
patent: 1763858 (1930-06-01), Peelle
patent: 2473127 (1949-06-01), Alexander
patent: 3190395 (1965-06-01), Lill
patent: 3327650 (1967-06-01), Bridges et al.
patent: 3337070 (1967-08-01), Guilbert, Jr.
patent: 3396822 (1968-08-01), Guilbert, Jr.
patent: 3447704 (1969-06-01), Guilbert, Jr.

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