Pilot operated no-back

Details Pilot operated no-back Pilot operated no-back

1992-09-24

1994-10-11

Lorence, Richard M.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 9, 188134, 244 75R, B60T 712

Patent

active

053539010

ABSTRACT:
Size problems and large power requirements for operating a no-back are avoided in a pilot operated no-back including a housing (10) journaling input and output shafts (12, 18). A brake disc pack (32) is disposed within the housing (10) and is compressible to prevent rotation of the output shaft (18). A ball ramp mechanism (24) has a rotary input plate (26) and a rotary output plate (28), the latter being axially movable to compress the brake disc pack (32). A selectively operable electric pilot brake (70) is provided to retard rotation of the output plate (28) but allow motion via opposing load if disengaged.

REFERENCES:
patent: 2649941 (1953-08-01), Doebeli
patent: 2659466 (1953-11-01), Ochtman
patent: 2834443 (1958-05-01), Olchawa
patent: 2933171 (1960-04-01), Kraeplin
patent: 3596740 (1971-08-01), Nau
patent: 3797614 (1974-03-01), McCay, Jr.
patent: 4121795 (1978-10-01), Craven
patent: 4441675 (1984-04-01), Boehringer et al.
patent: 4483429 (1984-11-01), Tiedeman
patent: 5141084 (1992-08-01), Lang et al.

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