Elevator – industrial lift truck – or stationary lift for vehicle – Having specific means contacting or on load support for... – Includes movable contact component on support for engaging...
Patent
1997-11-06
1998-10-13
Bucci, David A.
Elevator, industrial lift truck, or stationary lift for vehicle
Having specific means contacting or on load support for...
Includes movable contact component on support for engaging...
157370, 157374, 157375, 188166, B66B 504
Patent
active
058198792
ABSTRACT:
An elevator safety brake is provided comprising two cantilevers, a pivot, a spring, and a hold-off-engagement linkage. In one embodiment, the hold-off-engagement linkage is comprised of two upper struts, and two lower struts. When it is desired to slow or stop the elevator via the safety brake, the lower struts move from a first position in which the lower struts are substantially in alignment with one another and the cantilevers are in an open position, to a second position in which the lower struts are not substantially in alignment with one another and the cantilevers are in a closed position. When the cantilevers are in the closed position, the spring exerts a force via the cantilevers on the guide rail in order to decelerate the elevator.
REFERENCES:
patent: 530971 (1894-12-01), Smith
patent: 990052 (1911-04-01), Koppell
patent: 2629461 (1953-06-01), Moyer
patent: 4697977 (1987-10-01), Loomer et al.
patent: 5503257 (1996-04-01), Sugita et al.
Beals James T.
Bennett Paul
Cooney Anthony
Ericson Richard J.
Lang Michael C.
Bucci David A.
Maguire, Jr. Francis J.
Otis Elevator Company
Tran Thuy V.
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