Overspeed brake for a lift car

Details Overspeed brake for a lift car Overspeed brake for a lift car

1976-07-30

1977-06-14

Blunk, Evon C.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

188188, 188189, B66B 524

Patent

active

040291774

ABSTRACT:
A rotatable sheave is mounted on one end of a platform lift, enabling the sheave to be turned by friction of guide cables as the platform descends. Dogs attached to the sheave extend themselves due to centrifugal force as the platform moves faster. At a specified speed, the governor dogs impact an activating lever which in turn releases a spring loaded retainer rod assembly. The retainer rod assembly then releases spring loaded push rods that engage brake cam dogs on each end of the platform. The brake cam dogs squeeze the guide cables against clamp bodies halting descent of the platform.

REFERENCES:
patent: 277073 (1883-05-01), Singer
patent: 685937 (1901-11-01), O'Neill et al.
patent: 1389867 (1921-09-01), Griffin
patent: 2943708 (1960-07-01), Sasgen
patent: 3119464 (1964-01-01), Rountree
patent: 3250348 (1966-05-01), Moyer

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