Flexible or portable closure – partition – or panel – Plural and/or with rigid closure – Plural strip – slat – or panel assemblies
Patent
1992-03-24
1992-12-15
Johnson, Blair M.
Flexible or portable closure, partition, or panel
Plural and/or with rigid closure
Plural strip, slat, or panel assemblies
160185, 160186, E06B 348
Patent
active
051708310
ABSTRACT:
A hangar door assembly for passing the vertical stabilizer of an airplane tail, includes a main door frame fitted into a wall of an aircraft hangar building, a main door pivotally mounted within the main door frame, an auxiliary door frame having a vertical edge, and fitted into the hangar building wall above the main door frame, an auxiliary door pivotally mounted on the vertical edge and biased with a spring to swing to an open position, a bearing assembly attached to the main door bearing against the auxiliary door, to oppose the biasing of the spring to close the auxiliary door when the main door is slid closed. A method for opening an auxiliary door as described above includes the steps of sliding the main door to an open position, thereby gradually moving the bearing assembly toward the vertical edge, keeping the auxiliary door in contact with the bearing assembly as the bearing assembly moves toward the vertical edge with the spring, thereby gradually opening the auxiliary door. A method for closing the auxiliary door described above includes the steps of sliding the main door to a closed position, thereby gradually moving the bearing assembly along the auxiliary door and away from the vertical edge, keeping the auxiliary door in contact with the bearing assembly as the bearing assembly moves away from the vertical edge with the spring, thereby gradually closing the auxiliary door.
REFERENCES:
patent: 3760861 (1973-09-01), Hammerstrom
patent: 3809144 (1974-05-01), Garufo
patent: 4124055 (1978-11-01), Aspenson et al.
patent: 4545418 (1985-10-01), List et al.
patent: 4637446 (1987-01-01), McQueen et al.
patent: 4793398 (1988-12-01), Hoff et al.
patent: 4971129 (1990-11-01), Townend
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