Hold-open lock
AssigneeThe Boeing Company
InventorAllan W. Opsahl
Life of this patent
Estimating the term…
Abstract
A locking device is provided for holding an aircraft door in an open position. The device includes a first member connected to the door which moves in correspondence with door opening and closing. A second member of the device is fixedly connected to aircraft structure that supports the door. A locking pin, connected to the first member, is engaged with a pin receiving opening in the second member when the door is fully open to hold the door in such position. The pin is movable axially by a manually operated lever to disengage the pin when it is desired to close the door.
Claims6
For a door mounted to a structure, a locking device for holding said door open, comprising:
- a first member connected to said door, wherein said first member moves between locking and unlocking positions correspondingly with opening and closing movement of said door;
- a second member fixedly connected to said structure, said second member including means for defining a predetermined path along which said first member moves during said opening and closing movement;
- a locking pin connected to said first member, said pin being movable along an axis between an engagement position and a nonengagement position, wherein said second member has an opening positioned to receive an end of said pin when said pin is in said engagement position and when said first member is in said locking position;
- first spring means biased for normally moving said pin along said axis into said engagement position;
- a lever member pivotally connected to said first member, and having a portion drivingly connected to said pin in a manner so that said pin moves axially against the bias of said first spring means and into said nonengagement position in response to pivotal movement of said lever member in a first rotational direction, said lever member further having a cam lobe portion that moves along an arcuate path when said lever member pivots;
- second spring means biased for normally pivoting said lever member in a second rotational direction opposing said first direction;
- a cam member pivotally connected to said first member and positioned adjacent said lever member, said cam member having a cam lobe portion normally positioned to project into said arcuate path of said lever member's cam lobe portion;
- third spring means biased for normally pivoting said cam member in the same direction as said first direction of rotation;
- and
- lock arming means, connected to said cam member, for pivoting said cam member in the same direction as said second rotational direction, said lock arming means being operable to pivot said cam member in response to movement of said first member along said path, and to pivot said cam member a sufficient amount so that said cam member's lobe portion moves out of said arcuate path of said lever member's cam lobe portion.
Dependencies are inferred from the claim text.