Interrupted semi-automatic action for firearms

Patent metadata

Field	Value
Publication number	US-2020182575-A1
Application number	US-201916710620-A
Country	US
Kind code	A1
Filing date	Dec 11, 2019
Priority date	Dec 11, 2018
Publication date	Jun 11, 2020
Grant date	—

Abstract

forward closed breech position in battery with the barrel and rearward open breech position, a cockable hammer controlled by a trigger, and a bolt release mechanism operably interacting with the bolt. The mechanism may comprise a user-actuated release button and spring-biased disconnect lever coupled thereto and selectively engageable with the hammer. Upon firing, the bolt travels rearward under recoil contacting and partially rotating the disconnect lever to engage the hammer, while simultaneously engaging the hammer which holds the bolt rearward. Actuating the release button fully rotates the disconnect lever to disengage the hammer from the bolt which returns to its forward position via a recoil spring to reclose the breech. A dual interlock safety in one position provided by the release mechanism prevents pulling the trigger and in another position prevents actuating the release button.

First claim

What is claimed is:

1 . A firearm with interrupted action comprising:
a longitudinal axis; a receiver defining a longitudinally-extending cavity; a barrel supported by the receiver; a trigger movably mounted to the receiver; a bolt slideably mounted in the cavity of the receiver for movement between a forward position in battery with the barrel and a rearward position; a cockable hammer operably interacting with the trigger, the hammer pivotably movable about a pivot axis between a rear cocked position and a forward fire position via pulling the trigger; the hammer configured and operable to retain the bolt in the rearward position after a trigger pull to fire the firearm; and a bolt release mechanism operably interacting with the bolt, the bolt release mechanism comprising a user-actuated release button and a spring-biased disconnect lever coupled to the release button; wherein actuating the release button when the bolt is in the rearward position releases the bolt.

2 . The firearm according to claim 1 , further comprising a transversely oriented pivot pin pivotably coupling the disconnect lever to the release button.

3 . The firearm according to claim 1 , wherein release button comprises an exposed actuating portion extending rearwardly from the rear of the receiver for engagement by the user to actuate the bolt release mechanism.

4 . The firearm according to claim 1 , wherein the release button is axially aligned with the longitudinal axis of the firearm.

5 . The firearm according to claim 1 , wherein the release button is movable upwards to an actuated position to release the bolt from its rearward position.

6 . The firearm according to claim 5 , wherein moving the release button upwards rotates a forwardly extending working protrusion of the disconnect lever downwards which in turn directly engages and rotates the hammer downwards to release the bolt.

7 . The firearm according to claim 6 , wherein the working protrusion of the disconnect lever engages a top surface of the hammer to force the hammer downwards to release the bolt.

8 . The firearm according to claim 5 , further comprising a reset spring biasing the release button towards a downward unactuated position.

9 . The firearm according to claim 1 , wherein the trigger comprises a sear protrusion configured to directly engage and hold the hammer in the cocked position when the trigger is unpulled, and wherein pulling the trigger releases the hammer to discharge the firearm.

10 . The firearm according to claim 1 , further comprising an operating spring arranged between the release button and the disconnect lever, the operating spring biasing the disconnect lever towards an upward position.

11 . The firearm according to claim 10 , wherein the disconnect lever is vertically positioned to at least partially enter the cavity of the receiver to engage the bolt when the bolt is in its rearward position.

12 . The firearm according to claim 11 , wherein when the bolt moves from the forward position to the rearward position with the disconnect lever in the upward position, the bolt pushes the disconnect lever downwards into engagement with the hammer which is held in the cocked position by the disconnect lever.

13 . The firearm according to claim 1 , wherein the disconnect lever comprises a travel stop which engages the receiver to limit an uppermost position of the disconnect lever.

14 . The firearm according to claim 1 , wherein the trigger comprises a trigger block protrusion selectively engageable with a locking recess on the bolt release mechanism, wherein the release button is not movable to release the bolt when the trigger block protrusion is engaged with the locking recess.

15 . The firearm according to claim 14 , wherein pulling the trigger engages the trigger block protrusion with the locking recess, and releasing the trigger disengages the trigger block protrusion from the locking recess.

16 . The firearm according to claim 15 , wherein the trigger block protrusion is independently moveable relative to a main body of the trigger to adjust engagement of the trigger block protrusion with the locking recess on the bolt release mechanism.

17 . The firearm according to claim 14 , wherein the locking recess is formed in the bottom of the release button and the trigger block protrusion is formed on a cantilevered rearward extension of the trigger.

18 . A firearm with interrupted action comprising:
a longitudinal axis; a receiver defining a longitudinally-extending cavity; a barrel supported by the receiver; a bolt slideably mounted in the cavity of the receiver for movement between a forward position in battery with the barrel and a rearward position; a hammer pivotably movable about a pivot axis between a rear cocked position and a forward fire position, the hammer operably engageable with the bolt after firing the firearm to retain the bolt in the rearward position; a trigger comprising a sear protrusion operably engaged with the hammer to retain the hammer in the rear cocked position; and a user-actuated bolt release mechanism configured to selectively engage the hammer; wherein actuating the bolt release mechanism when the hammer is retaining the bolt in the rearward position rotates the hammer which releases the bolt.

19 . The firearm according to claim 18 , wherein the bolt release mechanism comprises:
a user-actuated release button comprising an exposed actuating portion extending rearwardly from a rear end of the receiver; and a spring-biased disconnect lever pivotably coupled to release button by a fixed primary pivot point, The disconnect lever extending forward from the release button for engaging the hammer; wherein the release button is movable between a downward unactuated position and upward actuated position associated with releasing the bolt when the hammer is engaged with the bolt in its rearward position.

20 . The firearm according to claim 19 , wherein when the bolt moves from the forward position to the rearward position, the bolt engages and pushes the disconnect lever downwards into engagement with the hammer which is held in the cocked position by the disconnect lever.

21 . The firearm according to claim 20 , wherein the sear protrusion of the trigger is disengaged from the hammer when the hammer is held in the cocked position by the disconnect lever.

22 . The firearm according to claim 20 , wherein the disconnect lever comprises an arcuately curved top cam surface which engages a cam of the bolt to push the disconnect lever downwards.

23 . The firearm according to claim 20 , wherein moving the release button from the downward unactuated position to the upward actuated position while the bolt is engaged with the disconnect lever rotates the disconnect lever downward to displace the hammer which breaks engagement with and releases the bolt forward.

24 . The firearm according to claim 23 , wherein the engagement between the bolt and disconnect lever defines a transient secondary pivot point about which the disconnect lever rotates downward while the bolt is in its rearward position.

25 . The firearm according to claim 18 , wherein the trigger and hammer are mounted in a separate removable trigger housing detachably coupled to the receiver, and the bolt release mechanism is mounted to a rear end of the receiver.

26 . A firearm with interrupted action co

Assignees

• Sturm Ruger & Co

Inventors

• Barrett Jonathan
• Mather Jonathan Philip

Classifications

• F41A17/52

  Thumb-operated sliding safeties mounted on the upside of the stock, e.g. for shotguns · CPC title

• F41A19/45 Primary

  for catching the hammer after each shot, i.e. in single-shot or semi-automatic firing mode · CPC title

• F41A19/47

  Cocking mechanisms · CPC title

• F41A17/42

  Safeties for locking the breech-block or bolt in a safety position (F41A17/32, F41A17/36, F41A17/40 take precedence {; anti-rebound arrangements F41A3/70}) · CPC title

• F41A19/14

  Hammers, i.e. pivotably-mounted striker elements; Hammer mountings · CPC title