Emergency power system for door

Details Emergency power system for door Emergency power system for door

1993-12-22

1995-01-10

Huppert, Michael S.

Aeronautics and astronautics

Aircraft structure

Details

49139, 49216, B64C 114

Patent

active

053799712

ABSTRACT:
A hinge arm (16) has opposite ends (18, 20) pivotably connected to an aircraft door (2) and a door frame (8). First and second sprockets (22, 26) are fixed to the door (2) and frame (8) adjacent to the ends (18, 20). A programming chain (30) extends around the sprockets (22, 26) and the arm (16). A linear motor (36) is mounted on the arm (16) in-line with the chain (30). When pressurized gas is supplied to the motor (36), it moves the chain (30) to open the door (2) and maintain it parallel to its closed position as it moves toward and into its fully open position. The door (2) may be opened manually without moving the motor piston (44) because the motor rod (52) slides freely through an axial opening (46) in the piston (44).

REFERENCES:
patent: 2432799 (1947-12-01), Rappl
patent: 2524271 (1950-10-01), Rappl
patent: 2524714 (1950-10-01), Rappl
patent: 2864342 (1958-12-01), Ziegelmeyer
patent: 3451669 (1969-06-01), Swezey
patent: 3940887 (1976-03-01), Slaybaugh
patent: 4607812 (1986-08-01), De Haan et al.
patent: 5289615 (1994-03-01), Banks et al.

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