Elevator door brake, brake, lock, and hold-open
First Claim
Patent Images
1. Brake apparatus for an elevator car door, comprising:
- an elevator car;
a door hanger for an elevator car door;
a brake shoe resiliently disposed on said car between said car and said hanger, said brake shoe being resiliently urged toward said car and away from said hanger;
a push-type solenoid disposed on said elevator car between said brake shoe and said car, and operable when energized to alternatively eitherwhen said elevator door is fully closed, push said brake shoe past the edge of said elevator door so as to lock said elevator door in said fully closed position, orwhen said elevator door is not fully open, push said pad against the surface of said hanger so as to provide braking action between said pad and said hanger.
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Accused Products
Abstract
When an elevator is running, the car door 27 is locked in the closed position by a brake shoe 12 which engages the edge of the door hanger 24 in response to a push-type solenoid 19 overcoming the force of a spring. When the door is not closed, a friction brake pad 11 contacts the door hanger surface to hold the door open for passenger boarding or to stop the door in case of failure of door operator power while the door is in motion.
8 Citations
2 Claims
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1. Brake apparatus for an elevator car door, comprising:
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an elevator car; a door hanger for an elevator car door; a brake shoe resiliently disposed on said car between said car and said hanger, said brake shoe being resiliently urged toward said car and away from said hanger; a push-type solenoid disposed on said elevator car between said brake shoe and said car, and operable when energized to alternatively either when said elevator door is fully closed, push said brake shoe past the edge of said elevator door so as to lock said elevator door in said fully closed position, or when said elevator door is not fully open, push said pad against the surface of said hanger so as to provide braking action between said pad and said hanger. - View Dependent Claims (2)
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Specification