Electrically powered or manually driven clutch and brake assembl

Details Electrically powered or manually driven clutch and brake assembl Electrically powered or manually driven clutch and brake assembl

1994-12-09

1996-11-12

Pitts, Andrea L.

192 clutches and power-stop control

Clutch and brake

192 12D, 192 19, 74421R, 254323, 254348, 254356, 254362, B60K 4124

Patent

active

055730914

ABSTRACT:
Electrically powered or manually driven clutch and brake mechanism for an electric wince cooperate with a transmission mechanism. The clutch mechanism is provided with a thrust bearing on a clutch shaft and a large clutch gear is then inserted thereon. A lining plate is attached to a clutch plate of the large gear and a pinion gear is attached tightly to the lining plate. Another thrust bearing is placed behind the pinion gear and a compression spring is inserted on the clutch shaft. The large and the pinion gears can be pushed tightly together or loosened as a function of resiliency of the spring. A clutch hand wheel can be provided for manual operation. In addition, the brake mechanism is designed such that a rotating shaft of a motor is provided with a disc brake which has a unidirectional bearing. The disc brake can be squeezed tightly by disc pads. A heavy load can thus be pulled by a cable of the wince, either manually or driven by power, and a braking force can be generated to prevent the heavy load from sliding in a reverse direction.

REFERENCES:
patent: 1936713 (1933-11-01), Freeman et al.
patent: 2525402 (1950-10-01), Dehn
patent: 3051447 (1962-08-01), Ahlbin
patent: 4004780 (1977-01-01), Kuzarov
patent: 4175727 (1979-11-01), Clarke
patent: 4553738 (1985-11-01), Plummer et al.
patent: 4588167 (1986-05-01), Finzel
patent: 5291601 (1994-03-01), Hanada et al.
patent: 5374035 (1994-12-01), Santos

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