Fall-arrest apparatus

Details Fall-arrest apparatus Fall-arrest apparatus

1987-05-28

1989-07-11

Kashnikow, Andres

Brakes

Operators

Speed-responsive

188 728, 188 712, 242 99, 254267, B66D 148, B66D 114

Patent

active

048463132

ABSTRACT:
A fall-arrest apparatus comprises a cable drum (2) and a friction brake including a rotatable brake disc (14) which is pressed against a stationary brake ring (15). In the event that the drum accelerates in the unwinding direction to a certain speed, pawls (19,20) carried by the drum (2) are centrifuged into driving engagement with the brake disc (14) to cause braking of the drum. The apparatus incorporates a fail-safe brake member (24) which is in screw-threaded engagement with a fixed part and is mechanically coupled to the rotatable brake disc (14) so that rotation of the brake disc (14) causes the fail-safe brake member to be screwed towards an operative position in which it causes progressive braking force to be applied between co-operating braking members (24,27,29).

REFERENCES:
patent: 297126 (1884-04-01), Freeman
patent: 4489919 (1984-12-01), Ostrobrod

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