Motor-driven control apparatus

Details Motor-driven control apparatus Motor-driven control apparatus

1989-07-03

1990-09-11

Braun, Leslie A.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 84C, F16D 2700

Patent

active

049559540

ABSTRACT:
A motor-driven apparatus for controlling a throttle valve includes first and second clutch plates 11,13 mounted on an output shaft 5 opposite each other, with the second clutch plate rigidly secured to the output shaft. The first clutch plate is urged by a spring 12 toward an output gear 10 rotatably mounted on the output shaft. When the second clutch plate is magnetized, the first clutch plate is attracted to it for engagement causing the second clutch plate to rotate with the first clutch plate and the output gear, thus transmitting the torque of a motor 18 to the output shaft. An axial gap between the second clutch plate and a yoke 15 ensures rotation of the second clutch plate even when foreign substances such as iron particles are trapped in the gap because the foreign substances will easily be displaced out of the gap by centrifugal force during rotation.

REFERENCES:
patent: 2880595 (1959-04-01), McGuffey et al.
patent: 4212272 (1980-07-01), Hawk
patent: 4237742 (1980-12-01), Barthruff
patent: 4343385 (1982-08-01), Kosuda et al.

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