Counterbalance mechanism for inwardly and upwardly opening plug-

Details Counterbalance mechanism for inwardly and upwardly opening plug- Counterbalance mechanism for inwardly and upwardly opening plug-

1995-05-12

1998-01-06

Kashnikow, Andres

Aeronautics and astronautics

Aircraft structure

Details

2441294, 74105, 49386, B64C 114

Patent

active

057045690

ABSTRACT:
A counterbalance mechanism (10) counters the weight of a door in an airplane. The door hingedly mounts to the fuselage of the airplane, and rotates upward and inward relative to the fuselage along a hinge axis. The counterbalance mechanism includes a housing (12) for affixing the counterbalance mechanism to the fuselage of the airplane. A guide tube (14) rotatably mounts to the housing for swinging movement about an axis of rotation generally parallel to the hinge axis of the door. The guide tube includes a rod (40) that extends outwardly from the guide tube. Compression springs (34) within the guide tube oppose outward movement of the rod. A linkage assembly that includes a bell crank (50) and a push rod (56) connects the guide tube to the door via rod (40) to assert counterbalancing force during the door opening and closing sequence of the door.

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Design Guide for Advanced Composites Application, "Design Study 6", date unknown.

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