U.S. Patent Specifications

Abstract

A service door and emergency exit structure for aircraft having an outer surface formed with a service door opening therein, an annular service door receivable in said service door opening having an emergency exist opening therethrough surrounded by said door, flange means projecting from the periphery of said door in overlapping relation to the inner face of the surface portion of the aircraft surrounding said service door opening, resilient scaling gasket means carried by said door intermediate the overlapping portion of said flange and said inner face of the surface portion, hinge means within the aircraft connected between said door and the inner face of said surface portion for swinging said frame inwardly out of said service opening and outwardly into said service opening, retractable latch means carried by said door, strike members carried on the inner face of the said surface portion receiving said latch means for retaining said door in said service door opening, an emergency door panel overlapping the outer surface of the door around its periphery, an annual panel supporting frame secured to the inner face of said door panel, receivable in, and removable out of said emergency exit opening in said service door, scaling gasket surrounding said emergency exit opening between the service door and the periphery of the emergency exit panel, said latching means comprising retractable locking bolts each having an actuator receiving recess at its inner end facing inwardly of the aircraft, a plurality of bolt retracting actuators slidably carried by said emergency exit door panel structure each having an actuating head received in one of said recesses, leaf spring means carried by said bolts for yieldably retaining said heads in said recesses, manually openable actuator means carried by said emergency door panel and connected to bolt retracting actuators for retracting said actuators to unlock said service door, separate locking members carried by said emergency door panel for locking engagement with said service door, emergency exit panel release actuator means carried by said emergency exit panel for unlocking said separate locking members to release said emergency exit panel from said service door including flexible actuating connectors connected between said last‐mentioned actuator means and said separate locking members, whereby release and outward displacement of said emergency exit panel from said service door disengages the said heads of said bolt retracting actuators from the recesses in the retractable service door locking bolts.

Citation

(1957), "U.S. Patent Specifications", Aircraft Engineering and Aerospace Technology, Vol. 29 No. 11, pp. 364-364. https://doi.org/10.1108/eb032899