Bidirectional clutch for curtain drawing mechanism

Details Bidirectional clutch for curtain drawing mechanism Bidirectional clutch for curtain drawing mechanism

1989-05-31

1991-01-08

Bonck, Rodney H.

192 clutches and power-stop control

Clutches

Automatic

192 31, F16D 4107

Patent

active

049828231

ABSTRACT:
A bidirectional clutch for a pulley drive has a rotary cam adapted to be mounted on an upright drive shaft of a motor, a pulley body having a drum portion coaxial with and spaced from the rotary cam, a plurality of rotary bodies positioned in the space between the drum portion and the rotary cam, and a guide member for rotatably supporting the rotary bodies for movement toward and away from the drum portion, a face of the rotary cam being opposed to the drum portion having a cam portion which, upon the cam being rotated relative to the rotary bodies and the drum portion through an angle equal to or greater than a predetermined angle, moves the rotary bodies toward and pressed them into engagement with the drum portion to transmit the rotational force of the motor to the drum portion and the pulley body.

REFERENCES:
patent: 836035 (1906-11-01), Hendricks
patent: 1015861 (1909-04-01), Warner
patent: 1141319 (1915-06-01), Coykendall
patent: 2066167 (1936-12-01), Swartz
patent: 2286760 (1942-06-01), Peterson
patent: 2389886 (1945-11-01), Bardega
patent: 3243023 (1966-03-01), Boyden
patent: 4253554 (1981-03-01), Nisenson

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