Brake system for elevator car doors

Details Brake system for elevator car doors Brake system for elevator car doors

1996-11-07

1997-09-30

Oberleitner, Robert J.

Brakes

Operators

Spring

188 68, 188 74, 187314, F16D 6300, F16D 5100, B60T 1304

Patent

active

056718292

ABSTRACT:
A brake mechanism for slowing elevator car doors in an elevator system during an emergency power outage or electrical control malfunction includes a brake shoe activated by a solenoid. During normal operation of the elevator car doors, the solenoid is in activated mode and maintains the brake shoe spaced away from the door pulley. During a power outage or electrical controls malfunction, the solenoid is deactivated and, in cooperation with a compression spring, forces the shoe brake to engage the door pulley to slow down the movement of elevator car doors.

REFERENCES:
patent: 3344556 (1967-10-01), Edwards
patent: 3439454 (1969-04-01), Strettar
patent: 3874632 (1975-04-01), Rago
patent: 4529065 (1985-07-01), Kraft
patent: 4696375 (1987-09-01), Mathews et al.
patent: 4926974 (1990-05-01), Morris et al.
patent: 5492266 (1996-02-01), Korhnen
patent: 5565668 (1996-10-01), Karner

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