192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1974-09-30
1976-05-18
Wyche, Benjamin W.
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
308184R, 188 83, F16D 6300
Patent
active
039571440
ABSTRACT:
A self-contained mechanical actuator, such as a jackscrew, which includes a housing in which a drive shaft assembly connects a power source to the input side of a speed reduction gear train, the output of which is associated with load-bearing means for manipulation of a load. A brake is provided in association with the drive shaft assembly where a minimum braking force can be used to maximum advantage. The brake includes a carrier member mounted about the drive shaft assembly solely by a plurality of ball elements carried by the carrier member and biased against the drive shaft assembly to apply a braking force against the shaft. The carrier member is restrained against rotational movement about the drive shaft assembly by engagement with an abutment rib in the housing, and against axial movement along the drive shaft assembly by ball element engagement in a circumferential groove formed in the shaft, with the carrier member being otherwise free for radial and axial movement to allow self-alignment of the ball elements in the groove for even braking action of the ball elements.
REFERENCES:
patent: 1162125 (1915-11-01), Bassett
patent: 1228673 (1917-06-01), Hribar
patent: 2178740 (1939-11-01), Dennis et al.
Duff-Norton Company, Inc.
Wyche Benjamin W.
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