Recoil operated firearm with unitary barrel and breech bolt lock member
AssigneeThe United States of America as represented by the Secretary of the Army
InventorCharles J. Schertz
Life of this patent
Estimating the term…
Abstract
A short-recoil operated automatic firearm is provided with a single locking ember for alternately (1) locking the breech bolt to the barrel while unlocking the barrel from the receiver, and (2) unlocking the breech bolt from the barrel while locking the barrel to the receiver. The locking member is a lever pivoted intermediate its ends on the barrel and comprising an arm engageable with an abutment (barrel buffer) on the receiver, an opposite arm having a notch engageable with a locking projection on the breech bolt, and an intermediate arm engageable by the bolt in its return movement to rotate the lever to bolt-locking (and barrel unlocking) position.
Claims6
A short-recoil-operated automatic firearm comprising:
- a receiver or frame;
- a barrel slidably mounted on said receiver for reciprocation between a forward position and a rearward position;
- a breech bolt slidably mounted on said receiver for reciprocation between a forward position, a rearward ejecting and loading position, and an intermediate position;
- and
- a single lock element mounted on said barrel and alternately engageable with portions of said breech bolt and said receiver for (1) locking said breech bolt to said barrel in said forward positions while permitting the locked barrel and breech bolt to recoil on firing, and (2) locking said barrel to said receiver in said rearward barrel position while releasing said breech bolt to continue its recoil motion;
- said single lock element being a lever pivoted intermediate its ends on said barrel and comprising a forward end engageable with a rearwardly-facing abutment on said receiver and a rear end with a lateral locking notch engageable with a complemental lateral locking projection on said breech bolt.
A short-recoil-operated atutomatic firearm comprising:
- a receiver or frame;
- a barrel slidably mounted on said receiver for reciprocation between a forward position and a rearward position;
- a breech bolt slidably mounted on said receiver for reciprocation between a forward position, a rearward ejecting and loading position, and an intermediate position;
- and
- a single lock element mounted on said barrel and alternately engageable with portions of said breech bolt and said receiver for (1) locking said breech bolt to said barrel in said forward positions while permitting the locked barrel and breech bolt to recoil on firing, and (2) locking said barrel to said receiver in said rearward barrel position while releasing said breech bolt to continue its recoil motion;
- a spring biasing said lock element toward barrel-locking position independent of the motions of said breech bolt and barrel;
- and
- means on said lock element actuated by the forward-moving breech bolt near said intermediate position for moving said lock element to barrel-releasing position.
Dependencies are inferred from the claim text.