Patent ID: 8256251

Claim:
In combination with a door lock employing a mortise deadbolt lock element, apparatus to facilitate operative engagement of a deadbolt actuation cam with the mortise deadbolt lock element, wherein the lock element is disposed for movement only in opposite directions along a reciprocal axis between a retracted position and an extended position, comprising: means mounting the cam for rotation about a rotational axis in a first direction wherein the cam urges a head of the mortise deadbolt lock element to the extended position, and a second, opposite direction wherein the cam urges a tail of the mortise deadbolt lock element to the retracted position; and a stop arm extending radially from said rotational axis and spaced at a fixed angle from the cam such that, as the cam approaches a rotated position, said stop arm engages said mortise deadbolt element and applies a force in a direction substantially perpendicular to said reciprocal axis, to said tail of the mortise deadbolt lock element to preclude further rotation of the cam in a direction in which it moves to urge the mortise deadbolt lock element into the extended position.