Linear lift and counterbalance aircraft passenger door

Details Linear lift and counterbalance aircraft passenger door Linear lift and counterbalance aircraft passenger door

1992-06-08

1993-10-26

Bucci, David A.

Aeronautics and astronautics

Aircraft structure

Details

16362, 49386, B64C 114

Patent

active

052558762

ABSTRACT:
Method and apparatus for vertically lifting a main entry door in an aircraft in order to clear stop fittings and open outward. A hollow shaft having a counterbalance spring and piston therein, which shaft is mounted in a hinge arm and is rotated via a drive chain. The shaft functions to rotate the door by means of splines on the shaft. A door attachment fitting is secured to the top of the piston and slides on the splines during vertical movement of the door.

REFERENCES:
patent: 3346992 (1967-10-01), Lodge
patent: 3751995 (1973-08-01), Carlson
patent: 3820282 (1974-06-01), Kornyiak
patent: 3888045 (1975-06-01), Piegza
patent: 4447026 (1984-05-01), Maraghe
patent: 4474348 (1984-10-01), Skotte
patent: 4479623 (1984-10-01), Maraghe et al.
patent: 4589613 (1986-05-01), Opsahl
patent: 4833827 (1989-05-01), Bode et al.

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