Patent ID: 8347665
Filing Date: 2013-01-08
Classification: E05B,Y10T

Abstract:
1. A self-balancing locking mechanism for actuating a locking pin-bar assembly of a door, comprising: a drive shaft mounted to the door and having an axis of rotation; a cam mounted to the drive shaft; at least one actuator plate having a proximal end with a radial slot formed therein and installed about the drive shaft, and a distal end coupled to the locking pin-bar assembly that is slidably supported adjacent a perimeter of the door; and at least one linkage bar having a proximal end pivotably coupled to the cam at a radial distance from the axis of rotation, and a distal end pivotably coupled to a mid-span of the actuator plate, wherein rotation of the cam causes the linkage bar to drive the actuator plate along a radial axis and engage the locking pin-bar assembly with a side edge of a door frame, and the radial slot to bear on the drive shaft and balance off-axis loads applied by the linkage bar to the actuator plate.