Adjustable personnel platform

Details Adjustable personnel platform Adjustable personnel platform

1987-10-02

1989-01-24

Rolla, Joseph J.

Fire escape, ladder, or scaffold

Means maintaining platform level on angularly movable support

Swingable support

187 9R, B66F 1104

Patent

active

047995734

ABSTRACT:
An adjustable personnel platform (38) is rotatably fastened on a lift tower end, with a carrying arm (42) and a pivot link (43) in the pivot plane of the elements (15, 21, 26) of the lift tower. It is automatically held horizontal through a reversable electric motor (96) and a speed translating drive (66, 67) as well as through a control surrounding a regulator with an inclination measuring device (92). The speed translating gear drive (66, 67) directly drives the rotatable part (64) of the pivot link (43). Between carrying arm (42) and the motor a plurality of direction changing couplings (81, 86) are provided. They arrest the rotation of the carrying arm (42) in both directions of rotation and release the rotary direction of the carrying arm (42) in a respective one of the rotary directions of the motor (97).

REFERENCES:
patent: 1967376 (1934-07-01), Smith et al.
patent: 2483811 (1949-10-01), Cullen
patent: 2938594 (1960-05-01), Eitel
patent: 3526295 (1970-09-01), Cornet
patent: 3590948 (1971-07-01), Milner
patent: 3590948 (1971-07-01), Milner, Jr.
patent: 3860088 (1975-01-01), Gellatly
patent: 4051923 (1977-10-01), Blanchette et al.
patent: 4116304 (1978-09-01), Durnell
patent: 4411511 (1983-10-01), Ariyama et al.

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