# US 8,464,456 B2 · Cocking and uncocking mechanism for a firearm

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- Number: US 8,464,456 B2
- Document ID: US8464456B2
- Status: Granted
- Kind: B2
- Application number: 13/378,876
- Filed: 2010-05-06
- Published: 2012-04-19
- Granted: 2013-06-18
- Earliest claimed: 2009-06-30
- Assignees: Steyr Mannlicher Holding GmbH
- Applicants: Harald Pichler
- Inventors: Harald Pichler
- Web page: https://patentgrep.com/patent/US8464456B2

## CPC

- F41A 19/31: Sear arrangements therefor (F41A19/33 takes precedence)
- F41A 19/12: Sears; Sear mountings
- F41A 19/34: Cocking mechanisms
- F41A 19/41: for breakdown guns
- F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE

## Abstract

The invention relates to a cocking and uncocking mechanism for a firearm, comprising a spring-loaded firing pin which, when in the cocked position, engages on a catch that can be released to fire, said catch being displaceable by an actuator element acting upon the catch via a link motion the control cam of which maintains the force to be applied to the actuator element to displace the catch to the cocked position substantially constant at least in the center region of the actuation path.

## Claims

### Claim 1

Cocking and uncocking mechanism for a firearm with a spring-loaded firing pin that engages in the cocked position with a catch that can be released to allow a shot, the catch being displaceable by an actuator element between the cocked position and a safety position relieving the tension of the firing pin spring, wherein the actuator element acts on the catch via a motion link having a control cam which maintains the force to be exerted on the actuator element in order to displace the catch into the cocked position substantially constant, at least in a central area of the actuation path.

### Claim 2 (depends on 1)

Cocking and uncocking mechanism according to claim 1, wherein the control cam reduces the force to be exerted onto the actuator element to displace the catch into the cocked position in a terminal area of the actuation path before the cocked position is reached.

### Claim 3 (depends on 1)

Cocking and uncocking mechanism according to claim 1, wherein the control cam is formed on the periphery of a pivoting crank driven by the actuator element and is sensed by a sensing linkage driving the catch.

### Claim 4 (depends on 3)

Cocking and uncocking mechanism according to claim 3, wherein the sensing linkage is equipped with a ball bearing-seated cam follower that rolls over the control cam.

### Claim 5 (depends on 3)

Cocking and uncocking mechanism according to claim 3, wherein the sensing linkage additionally engages with an auxiliary linkage guide of the motion link in order to hold the cam follower in contact with the control cam even during the return motion into the safety position.

### Claim 6 (depends on 3)

Cocking and uncocking mechanism according to claim 3, wherein the sensing linkage comprises a linearly movable sensing rod that follows the control cam at one end and drives the catch at the other end.

### Claim 7 (depends on 6)

Cocking and uncocking mechanism according to claim 6, wherein the linearly movable sensing rod comprises a housing-seated two-armed lever.

### Claim 8 (depends on 1)

Cocking and uncocking mechanism according to claim 1, wherein the actuator element is a cocking slide.

### Claim 9 (depends on 8)

Cocking and uncocking mechanism according to claim 8, wherein the cocking slide is locked in the cocked position and can be detached from the locked position by means of a pushbutton.

### Claim 10 (depends on 1)

Cocking and uncocking mechanism according to claim 1, wherein the firearm is a semiautomatic weapon with a rotary piston action.

### Claim 11 (depends on 1)

Cocking and uncocking mechanism according to claim 1, wherein the firing pin engages with the catch by means of an attached firing pin tab.