Railroad hand brake with spring clutch

Details Railroad hand brake with spring clutch Railroad hand brake with spring clutch

B - Operations, Transporting

61

H

188/57

B61H 13/04 (2006.01)

Patent

CA 1094465

RAILROAD HAND BRAKE WITH SPRING CLUTCH Abstract of the Disclosure A railroad hand brake includes a spring clutch interposed between an operating hand wheel and a gear drive for the chain drum. The clutch. includes a spring cooperat- ing with a control drum and with an output drum connected to the gear drive. An input element is rotated by the hand wheel in a forward direction to energize the spring so that the input element, the control drum and the output drum rotate as a unit to take up the brake load. A ratchet and pawl prevent reverse movement of the control drum in order to maintain the brake load applied when the hand wheel is released. When the hand wheel is rotated in the reverse direction, the input element tends to deenergize the spring, and the brake load is gradually released with a clutch action characterized by small input force and little wear. A quick release element operable with a small manual force abruptly uncouples the spring from the load drum in order to free the load quickly while the input element and hand wheel are stationary.

315961

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