Passenger suite door with quick release egress feature
A door assembly for an aircraft passenger suite includes a stationary wall, a rail mounted to the stationary wall, a carriage translatably mounted to the rail, a movable door, and a lock pin mounted to the door. The door assembly further includes a carriage subassembly mounted to the carriage including a receiver for receiving the lock pin, and a spring-loaded clamp for exerting a retaining force on the lock pin to retain the lock pin in the receiver. In embodiments, the lock pin has a configuration in which a force required to disengage the lock pin from the receiver is greater than a force required to engage the lock pin in the receiver. In use, in the event of mechanism failure, force can be applied to the door to decouple the lock pin from the receiver to move the door to facilitate egress.
1 . A door assembly for an aircraft passenger suite, comprising:
a stationary wall forming part of the aircraft passenger suite;
a rail mounted to the stationary wall;
a carriage translatably mounted to the rail;
a door movable relative to the stationary wall;
a lock pin mounted to the door;
a carriage subassembly mounted to the carriage, the carriage subassembly including:
a base;
a receiver formed in one end of the base and configured to receive the lock pin; and
a spring-loaded clamp rotatably mounted to the base and configured to exert a retaining force on the lock pin to retain the lock pin in the receiver; and
an indicator subassembly configured to report a coupling status of the lock pin and the carriage, the indicator subassembly comprising:
a crank rotatably mounted to the door, wherein the carriage subassembly maintains the crank in a first position when the lock pin is engaged in the receiver, and the crank is free to rotate to a second position when the lock pin is disengaged from the receiver;
a link coupled to the crank; and
an indicator couped to the link, wherein the indicator is maintained within the door when the crank is in the first position, and the indicator is positioned outside of the door when the crank is in the second position, and wherein the indicator positioned outside of the door is indicative of a decoupled state of the door.
2 . The door assembly according to claim 1 , wherein:
the door is attached to the carriage when the lock pin is received in the receiver such that translational motion of the carriage along the rail moves the door relative to the stationary wall; and
the door is detached from the carriage when the lock pin is disengaged from the receiver.
3 . The door assembly according to claim 1 , wherein the lock pin comprises:
a cylindrical front end; and
a bulbous portion positioned rearward of the cylindrical front end, the bulbous portion having a front annular chamfer that slopes upward away from the cylindrical front end, and a rear annular chamfer that slopes downward in a direction away from the cylindrical front end.
4 . The door assembly according to claim 3 , wherein a slope of the rear annular chamfer is greater than a slope of the front annular chamfer such that a force required to disengage the lock pin from the receiver is greater than a force required to engage the lock pin in the receiver.
5 . The door assembly according to claim 3 , wherein the spring-loaded clamp comprises:
a front portion configured to slide past the front annular chamfer as the lock pin is advanced in the receiver, and come to rest against the rear annular chamfer when the lock pin is fully engaged in the receiver;
a middle portion that rotates about a fulcrum; and
a rear portion that engages a compression spring disposed between the rear portion of the spring-loaded clamp and a spring seat formed in the carriage subassembly.
6 . The door assembly according to claim 5 , wherein the compression spring biases the front portion of the spring-loaded clamp toward a longitudinal axis of the receiver.
7 . The door assembly according to claim 1 , wherein the carriage carries a plurality of vertical oriented rollers configured to roll along the rail.
8 . The door assembly according to claim 1 , wherein:
the rail, the carriage, and the carriage subassembly form an upper attachment interface positioned at a top of the door;
the door assembly comprises a second rail, a second carriage, and a second carriage subassembly positioned at a bottom of the door forming a lower attachment interface; and
the upper attachment interface and the lower attachment interface are substantially symmetrical.
9 . An assembly for removably attaching a translating door to a stationary wall, the assembly comprising:
a rail mountable to the stationary wall;
a carriage translatably mounted to the rail;
a lock pin mountable to the door;
a carriage subassembly mounted to the carriage, the carriage subassembly including:
a base;
a receiver formed in one end of the base and configured to receive the lock pin; and
a spring-loaded clamp rotatably mounted to the base and configured to exert a retaining force on the lock pin to retain the lock pin in the receiver; and
an indicator subassembly configured to report a coupling status of the lock pin and the carriage, the indicator subassembly comprising:
a crank rotatably mountable to the door, wherein the carriage subassembly maintains the crank in a first position when the lock pin is engaged in the receiver, and the crank is free to rotate to a second position when the lock pin is disengaged from the receiver;
a link coupled to the crank; and
an indicator couped to the link, wherein the indicator is configured to be maintained within the door when the crank is in the first position, and the indicator is configured to be positioned outside of the door when the crank is in the second position, and wherein the indicator being positioned outside of the door corresponds to a decoupled state of the door.
10 . The assembly according to claim 9 , wherein:
the door is attached to the carriage when the lock pin is received in the receiver such that translational motion of the carriage along the rail moves the door relative to the stationary wall; and
the door is detached from the carriage when the lock pin is disengaged from the receiver.
11 . The assembly according to claim 9 , wherein the lock pin comprises:
a cylindrical front end; and
a bulbous portion positioned rearward of the cylindrical front end, the bulbous portion having a front annular chamfer that slopes upward away from the cylindrical front end, and a rear annular chamfer that slopes downward in a direction away from the cylindrical front end;
wherein the spring-loaded clamp engages the rear annular chamfer to retain the lock pin in the receiver.
12 . The assembly according to claim 11 , wherein a slope of the rear annular chamfer is greater than a slope of the front annular chamfer such that a force required to disengage the lock pin from the receiver is greater than a force required to engage the lock pin in the receiver.
13 . The assembly according to claim 12 , wherein the spring-loaded clamp comprises:
a front portion configured to slide past the front annular chamfer as the lock pin is advanced in the receiver, and come to rest against the rear annular chamfer when the lock pin is fully engaged in the receiver;
a middle portion that rotates about a fulcrum; and
a rear portion that engages a compression spring disposed between the rear portion of the spring-loaded clamp and a spring seat formed in the carriage subassembly.
14 . The assembly according to claim 13 , wherein the compression spring biases the front portion of the spring-loaded clamp toward a longitudinal axis of the receiver.
15 . The assembly according to claim 9 , wherein the carriage carries a plurality of vertical oriented rollers configured to roll along the rail.
16 . A passenger suite door assembly, comprising:
a door;
a lock pin mounted to the door;
a carriage subassembly configured to releasably engage the lock pin, the carriage subassembly translatably mountable to a rail mountable to a stationary wall, the carriage subassembly including:
a base;
a receiver formed in one end of the base configured to receive the lock pin; and
a spring-loaded clamp rotatably mounted to the base and configured to exert a retaining force on the lock pin to retain the lock pin in the receiver; and
an indicator subassembly configured to report a coupling status of the lock pin and the carriage subassembly, the indicator subassembly comprising:
a crank rotatably mounted to the door, wherein the carriage subassembly maintains the crank in a first position when the lock pin is engaged in the receiver, and the crank is free to rotate to a second position when the lock pin is disengaged from the receiver;
a link coupled to the crank; and
an indicator couped to the link, wherein the indicator is maintained within the door when the crank is in the first position, and the indicator is positioned outside of the door when the crank is in the second position, and wherein the indicator positioned outside of the door is indicative of a decoupled state of the door relative to the carriage subassembly; and
wherein:
in a first operating condition of the passenger suite door assembly, the lock pin is engaged in the carriage assembly such that the door moves with the carriage subassembly as the carriage subassembly translates along the rail; and
in a second operating condition of the passenger suite door assembly, the door is configured to be pushed toward an opening direction of the door to disengage the lock pin from the carriage subassembly.
17 . The passenger suite door assembly according to claim 16 , wherein the first operating condition corresponds to use in which the carriage subassembly is operative to translate the door, and the second operating condition corresponds to use in which the carriage subassembly becomes inoperative to translate the door.
18 . The passenger suite door assembly according to claim 16 , wherein the lock pin comprises:
a cylindrical front end; and
a bulbous portion positioned rearward of the cylindrical front end, the bulbous portion having a front annular chamfer that slopes upward away from the cylindrical front end, and a rear annular chamfer that slopes downward in a direction away from the cylindrical front end;
wherein a slope of the rear annular chamfer is greater than a slope of the front annular chamfer such that a force required to disengage the lock pin from the receiver is greater than a force required to engage the lock pin in the receiver.