Device for discontinuing and automatically restoring the operati

Details Device for discontinuing and automatically restoring the operati Device for discontinuing and automatically restoring the operati

1975-12-10

1976-11-30

Halvosa, George E. A.

Expansible chamber devices

With releasable latch means between working member and power...

92 63, 92130A, 188170, 192 91R, F01B 900

Patent

active

039942066

ABSTRACT:
A manual disconnecting device is provided for disengaging the brake push rod in a spring brake actuator having a movable piston holding the spring compressed by fluid pressure during normal operation. The device once manually disconnected is automatically reconnected upon a normal spring compression stroke of the piston. The disconnecting device provides a clutching device between the piston and the push rod engaging a nut threaded on the push rod with non-self-locking threads. In one embodiment the nut us journalled in the piston. In another embodiment there are clutch surfaces on both the piston and nut which are disengaged by a rotary motion from a special tool.

REFERENCES:
patent: 3107583 (1963-10-01), Woodward
patent: 3704653 (1972-12-01), Higgins
patent: 3782251 (1974-01-01), Marchand
patent: 3895695 (1975-07-01), Hunter

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