US Patent 7421868 Enhanced extendable multipoint lock

A multipoint lock including a locking mechanism adapted to selectively retract and extend at least one locking element relative to an elongate housing, wherein the locking mechanism includes an arm pivotally attached to a lock actuator and constrained to travel in a channel formed in a linkage device linked to the at least one locking element, and wherein in a first position of the lock actuator, the arm is at a first limit of travel in the channel and is pivoted in a first angular direction with respect to the lock actuator so as to be geometrically locked at the first limit of travel.