Patent ID: 7337572
Filing Date: 2008-03-04
Classification: F41A

Abstract:
1. A locking device for a mainspring housing in a firearm comprising: said mainspring housing, comprising an internal cylindrical portion for receiving a firing spring; a lock rod, received in a main housing, for selectively engaging the firing spring, the lock rod movable between an engagement position and a disengagement position with the firing spring; at least two combination disks for engaging the lock rod, to selectively fix the lock rod in one of the engagement position and the disengagement position; wherein each combination disk cooperates with a respective disk pin, each disk pin having a proximal end for engaging a respective notch on the lock rod and a distal end for engaging a depression on an interior surface of the respective combination disk, wherein engagement of the proximal end of said each disk pin with the respective notch retains the lock pin, and engagement of the distal end of each lock pin with the respective depression allows movement of the proximal end out of the notch, releasing the lock pin.