Overtravel stop and neutral position lock

Details Overtravel stop and neutral position lock Overtravel stop and neutral position lock

1988-07-06

1989-09-12

Peters, Jr., Joseph F.

Aeronautics and astronautics

Aircraft control

244 75R, 244224, B64C 1314

Patent

active

048652695

ABSTRACT:
An aircraft flight control surface actuator that prevents against overtravel is provided with a lock which includes a pin (76) that is urged by spring (b 74) toward the wall (68) that is part of control gear (56) which travels along the axis of a threaded shaft (42) in response to rotation of main shaft (16). An aperture (70) in the wall (68) is aligned with pin (76) only at a neutral position of the flight control surface (12). Lever (80) depresses pin (76) against the force of spring (74) only so long as hydraulic system pressure for the actuator is supplied to cylinder (84).

REFERENCES:
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patent: 4080875 (1978-03-01), Repolovsky et al.
patent: 4173322 (1979-11-01), MacDonald
patent: 4280398 (1981-07-01), Kerscher et al.
patent: 4470340 (1984-09-01), Goans et al.
patent: 4496121 (1985-01-01), Berlin
patent: 4526058 (1985-07-01), Runkel et al.
patent: 4595158 (1986-06-01), Robinson
patent: 4603594 (1986-08-01), Grimm
patent: 4633984 (1987-01-01), Hudson

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