Lift speed limiter

Details Lift speed limiter Lift speed limiter

B - Operations, Transporting

66

B

187/16

B66B 1/00 (2006.01)

Patent

CA 1236777

ABSTRACT A speed limiter for an elevator has a rope sheave driven by a rope connected with a catch device. The speed limiter includes a pre-set brake for a brake element mounted on an axle for rotation relative to the axle against the braking effect, the rope sheave rotatably carrying two diametrically opposed eccentric cams which are interconnected by centrifugal weights eccentrically pivoted thereto. The eccentric cams are turnable by centrifugal weights radially outwardly of the axle, whereby the weights cause the cams to engage with a brake disk which is held fast through friction contact between two disks fixedly mounted on the axle and urged against each other by presettable springs. The eccentric cams have a return spring which, when a given triggering speed of the rope sheave is attained, engages with the rotatable braking element.

508418

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