Unidirectional no-back device

Details Unidirectional no-back device Unidirectional no-back device

1987-06-15

1990-03-20

Braun, Leslie A.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

188134, F16D 6702

Patent

active

049093630

ABSTRACT:
A unidirectional no-back device having an input shaft and an output shaft and grounded releasable brake structure for holding the output shaft against rotation. A drive train between the input and output shafts has first and second ball and ramp structures. The first ball and ramp structure is operable upon rotation of the input shaft in either direction by a prime mover to release the brake structure and enable driving of the output shaft by the input shaft. The second ball and ramp structure is responsive to torque flow from rotation of the output shaft in one direction to release the brake structure to permit backdriving of the input shaft and prime mover from the output shaft and is inoperative in response to torque flowing in an opposite direction of rotation of the output shaft so as to not release the brake structure and thus preclude rotation of the output shaft.

REFERENCES:
patent: 2659466 (1953-11-01), Ochtman
patent: 2925157 (1960-02-01), Davis
patent: 3011605 (1961-12-01), Hungerford, Jr. et al.
patent: 3285377 (1966-11-01), Rasmussen
patent: 3596740 (1971-08-01), Nau
patent: 3720077 (1973-03-01), Jackson et al.
patent: 3757472 (1973-09-01), Rogakos
patent: 3981186 (1976-09-01), Rauch et al.
patent: 4176733 (1979-12-01), Twickler
patent: 4483429 (1984-11-01), Tiedeman
patent: 4579201 (1986-04-01), Tiedeman
patent: 4597477 (1986-07-01), Miller

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