Patent ID: 8720239

Claim:
A lock mechanism comprising: a lock cylinder; a lockrod actuator coupled to the lock cylinder and adapted to rotate between first and second angular displacements, the lockrod actuator having a first hinge point and an opening, each of which is spaced from a center of the lockrod actuator; a linkage arm coupled to the lockrod actuator at the first hinge point and having a second hinge point spaced from the first hinge point; a linear actuator adapted to cause axial movement of the linkage arm to cause the lockrod actuator to rotate; a lockrod extending through the opening and adapted to move between first and second orientations; and a pin disposed adjacent to the lockrod actuator and adapted to bias the linkage arm in an upwardly direction against gravitational forces in response to axial movement of the linkage arm in a direction toward the lockrod actuator.