Fin control actuator having a fin shaft lock device

Details Fin control actuator having a fin shaft lock device Fin control actuator having a fin shaft lock device

1993-07-12

1995-04-25

Barefoot, Galen L.

Aeronautics and astronautics

Aircraft control

244 324, 244224, B64C 1324

Patent

active

054091853

ABSTRACT:
A fin control actuator for missiles carried on aircraft has a device which locks the fin shaft against aerodynamic loads and prevents the transmission of these loads through the drive train. The fin shaft lock includes a plunger which has a cam having a locking portion for engaging the output shaft and preventing the output shaft from rotating in one direction when the plunger is in the locking position. The cam also has a camming portion for engaging the output shaft and pushing the plunger to the retracted position when the output shaft rotates in the opposite direction. The plunger is urged into the locking position by a spring and is held in the retracted position by a permanent magnet. The fin lock device is reusable and does not consume any power after it is set.

REFERENCES:
patent: 2294906 (1942-09-01), Holloman
patent: 2584038 (1952-01-01), Morrison
patent: 2869386 (1959-01-01), Hoover
patent: 3001474 (1961-09-01), McLean
patent: 3154015 (1964-10-01), Muller
patent: 4173322 (1979-11-01), Macdonald
patent: 4603594 (1986-08-01), Grimm

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