Aeronautics and astronautics – Aircraft structure – Details
Patent
1990-12-04
1992-04-21
Barefoot, Galen
Aeronautics and astronautics
Aircraft structure
Details
2441372, 244905, B64D 2514, B64C 134
Patent
active
051060361
ABSTRACT:
A method and apparatus for fitting aircraft having manually operated escape slide girt bars with a mechanism that automatically engages the girt bar in a floor mounted bracket as the entry door is latched, releases the girt bar from the floor bracket when a foot pedal is depressed as the door is unlatched in non-emergency circumstances, and releases the girt bar from the door when the door is opened in emergency situations for deploying an escape slide. Support arms having spring loaded tongues on their remote ends are connected to the girt bar, while brackets in the door each receive one of the spring loaded tongues and hold the same in tongue retaining fittings. The tongue retaining fittings normally push the girt bar out of the floor brackets as the door is unlatched prior to opening and are provided with hinge tab stops to engage support arm hinge tabs on the girt bar support arm to lift the girt bar off of the floor as the door is unlatched prior to opening with the foot pedal depressed. However, the girt bar support arm tongues are released from the tongue retaining fittings when the door is opened under emergency circumstances. The girt bar engages floor brackets, where it is retained by pawls, as the lower gate of the door rotates downwardly during closure. The pawls are released by a cam actuated by pawl actuator arms connected to a torque tube operated by the foot pedal.
REFERENCES:
patent: 3397432 (1968-08-01), Banas
patent: 3852854 (1974-12-01), Sigrud et al.
patent: 4106729 (1978-08-01), Bergman et al.
patent: 4715562 (1987-12-01), Bokalot
Barefoot Galen
The Boeing Company
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