Patent ID: 9625231
Date: 2017-04-18
CPC Classifications: F41C

Claim:
1. A firearm, comprising: a receiver; a barrel having a chamber and joined to said receiver; a cartridge magazine to contain a cartridge, where said cartridge magazine is removably affixed to said receiver; a sliding bolt configured to reciprocate relative to the receiver between an in-battery position and a rearward position, where said sliding bolt comprises a face contoured to engage with the cartridge, a sliding bolt cap with a locking groove, and a rack surface with rack teeth disposed along at least a portion of said rack surface; an extractor disposed on said face of said sliding bolt and contoured to receive and support the cartridge; a pinion with a spring-loaded locking pin and with pinion teeth, pivotally connected to said receiver via a pivot pin affixed to said receiver, and arranged so that said rack teeth on said sliding bolt mesh with said pinion teeth so that pivoting of the pinion causes motion of the rack; a claw disposed on the pinion and configured to engage and extract the cartridge from said cartridge magazine and deliver the cartridge to said extractor when said pinion pivots; a lever member with a pull-hook, pivotally connected to said receiver via said pivot pin and configured to alternate between a coupled configuration and a partially uncoupled configuration with said pinion via said spring-loaded locking pin; at least one decoupling pin affixed to said receiver and disposed to interact with said spring-loaded locking pin when the pinion pivots and to move said spring-loaded locking pin so that the pinion is released from said coupled configuration to said partially uncoupled configuration with said lever member; a bolt pin with a pull-hook recess, contoured to couple with said locking groove and configured to reciprocate relative to the receiver between a locked position when said sliding bolt is in approximately the in-battery position and an unlocked position, and where said lever member is positioned to push said bolt pin into said locking groove as said lever member pivots towards said bolt pin, and where said pull-hook is disposed in said pull-hook recess when said bolt pin is coupled with said locking groove; a bolt pin retainer disposed on said receiver and extending into said pull-hook recess; a hammer configured to reciprocate relative to the receiver between a cocked position and an uncocked position and disposed in relation to said sliding bolt so that said sliding bolt engages the hammer as said sliding bolt approaches the in-battery position from said rearward position, causing said hammer to move into said cocked position from said uncocked position; a hammer spring disposed so that motion of said hammer as it approaches said cocked position results in compression of said hammer spring; a spring-loaded sear pivotally attached to said receiver and disposed to engage with said hammer when said hammer is in said cocked position; a spring-loaded trigger, pivotally attached to said receiver and disposed to engage with said spring-loaded sear and to release said spring-loaded sear so that said spring-loaded sear disengages from said hammer when said trigger is depressed; a firing pin disposed between said hammer and said barrel, wherein said firing pin is struck by said hammer towards said barrel when said sear is disengaged from said hammer; an ejector mounted in said receiver; and an ejector opening configured to allow said cartridge to exit said receiver, once spent.