Brakes – Wheel – One-way brakes
Patent
1992-12-03
1994-01-04
Butler, Douglas C.
Brakes
Wheel
One-way brakes
188 823, 188 8284, 188163, 188171, 192 44, 192 451, 192 90, F16D 6300
Patent
active
052752615
ABSTRACT:
An electromagnetic brake/clutch device includes a drive shaft supported by at least one bearing for transmitting torque, a housing, affixed to prevent its rotation, surrounding the drive shaft, and an electromagnetically activated device within the housing to selectively prevent and allow rotation of the drive shaft. The electromagnetically activated device includes a plurality of cammed rollers acting to prevent clockwise rotation of the drive shaft and a plurality of cammed rollers to prevent counter-clockwise rotation of the drive shaft. The drive shaft includes a circumferential disk and the housing includes a reaction ring for engagement with the plurality of cammed rollers. The plurality of cammed rollers are released from engagement with the circumferential disk and the reaction ring by a plurality of tripping mechanisms within the housing. The tripping action uses the locking force to act as a release force merely by changing the boundary conditions of the roller interface angles. The tripping mechanisms include trippers for disengaging the plurality of cammed rollers and an anvil shaped portion for providing lateral movement of the trippers. The plurality of cammed rollers is preloaded to engagement with the circumferential disk and reaction ring by a spring, and is located with respect to an adjacent tripping mechanism with another spring.
REFERENCES:
patent: 1152075 (1915-08-01), Buschmann
patent: 1542040 (1925-06-01), Lavaud
patent: 2299739 (1942-10-01), Colucci
patent: 2385799 (1945-10-01), Dodge
patent: 3476226 (1969-11-01), Massey
patent: 3812936 (1974-05-01), Dane
patent: 4998605 (1991-03-01), Ferris
Butler Douglas C.
Clohan, Jr. Paul S.
Marchant R. Dennis
Miller Guy M.
The United States of America as represented by the Administrator
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