Hoist or the like

Details Hoist or the like Hoist or the like

1982-03-08

1985-04-09

Stoner, Jr., Bruce H.

Brakes

Operators

Spring

188158, 192 90, 307132E, 318302, B60T 1304, B60L 700, F16D 1900, H01H 5134

Patent

active

045096201

ABSTRACT:
The improved hoist includes a direct current brake and a control therefor. In the brake control, the AC current is rectified with DC current being sent to the brake solenoid. When the hoist is operating, the brake solenoid is energized to hold the brake in the unactivated position. A timer and power reducer are utilized to reduce the power on the solenoid while the hoist is in operation, thus reducing the energy expended while the hoist is in operation. The operating speed of the brake is increased since less power must be dissipated from the solenoid before the brake can be actuated.

REFERENCES:
patent: 748762 (1904-01-01), Lorin
patent: 2025098 (1935-12-01), Dudick
patent: 2317344 (1943-04-01), Hood
patent: 3151708 (1964-10-01), Trombetta
patent: 3171515 (1965-03-01), Wolfe
patent: 3180469 (1965-04-01), Wiedmann et al.
patent: 3614565 (1971-10-01), Mierendorf
patent: 3761730 (1973-09-01), Wright
patent: 3830344 (1974-08-01), Cervenec et al.
patent: 4114184 (1978-09-01), Stampfli
patent: 4232768 (1980-11-01), Dufresne

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