Overspeed brake

Details Overspeed brake Overspeed brake

1985-06-13

1989-08-15

Kashnikow, Andres

Brakes

Operators

Speed-responsive

188 715, 188184, 188187, B60T 712

Patent

active

048566233

ABSTRACT:
An overspeed brake mounted on an elevator cage includes a shaft that carries a pinion engageable with a rack so that linear movement of the cage produces rotation of the shaft. A carrier rotated by the shaft has two pivotably mounted dogs thereon that move outwardly at a predetermined centrifugal force level to cause rotation of a separation ring. A spreader causes axial first separation between the first ring and a second separation ring in response to the rotation, forcing two brake surfaces together and stopping rotation of the shaft, thereby halting linear motion of the cage.

REFERENCES:
patent: 2494443 (1950-01-01), Luehrs
patent: 2916105 (1959-12-01), Dasse et al.
patent: 3143125 (1964-08-01), Stelzer
patent: 3194371 (1965-07-01), Rabinow
patent: 3415343 (1968-12-01), Svensson
patent: 4095681 (1978-06-01), David
patent: 4258832 (1981-03-01), Thorp

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