# US 11,029,116 B2 · Trigger mechanism for firearms

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- Number: US 11,029,116 B2
- Document ID: US11029116B2
- Status: Granted
- Kind: B2
- Application number: 16/743,221
- Filed: 2020-01-15
- Published: 2020-07-16
- Granted: 2021-06-08
- Earliest claimed: 2019-01-15
- Assignees: CMC Triggers Corp.
- Applicants: CMC Triggers Corp.
- Inventors: Jack Richard Biegel
- Web page: https://patentgrep.com/patent/US11029116B2

## CPC

- F41A 11/00: Assembly or disassembly features; Modular concepts; Articulated or collapsible guns (F41A3/64, F41A19/10 - F41A19/15, F41A21/48, F41A25/26 take precedence)
- F41A 19/34: Cocking mechanisms
- F41A 17/46: Trigger safeties, i.e. means for preventing trigger movement (F41A17/02 - F41A17/40 take precedence)
- F41A 17/52: Thumb-operated sliding safeties mounted on the upside of the stock, e.g. for shotguns
- F41A 19/10: Triggers; Trigger mountings
- F41A 19/16: Adjustable firing mechanisms; Trigger mechanisms with adjustable trigger pull (F41A19/17 takes precedence)
- F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE

## Abstract

Provided is a trigger mechanism having a housing, a trigger member, a trigger dog, and a striker dog. The trigger member is pivotally mounted in the housing, movable between set and pulled positions. The trigger dog is pivotally mounted in the housing and a first lever arm portion of the trigger dog engages a lever arm portion of the trigger member by a first over-center linkage. The striker dog is pivotally mounted in the housing, movable between set and released positions with a lever arm portion engaged to a second lever arm portion of the trigger dog by a second over-center linkage. The over-center linkages are configured to inhibit rotation of the striker dog from the set position to the released position until the trigger member is manipulated from the set position to the pulled position with a force greater than an engagement threshold of the over-center linkages.

## Claims

### Claim 1

A firearm trigger mechanism, comprising:
a housing;
a trigger member pivotally mounted in the housing and movable between set and pulled positions;
a trigger dog pivotally mounted in the housing and a first lever arm portion of the trigger dog engaged to a lever arm portion of the trigger member by a first over-center linkage; and
a striker dog pivotally mounted in the housing movable between set and released positions and including a lever arm portion of the striker dog engaged to a second lever arm portion of the trigger dog by a second over-center linkage,
wherein the over-center linkages are configured to inhibit rotation of the striker dog from the set position to the released position until the trigger member is manipulated from the set position to the pulled position with a force greater than an engagement threshold of the over-center linkages.

### Claim 2 (depends on 1)

The trigger mechanism of claim 1, wherein the housing is removably attachable to a firearm receiver.

### Claim 3 (depends on 2)

The trigger mechanism of claim 2, wherein the housing is removably attachable with one or more assembly pins, none of which operate as a pivot axle for any pivoting part of the trigger mechanism.

### Claim 4 (depends on 1)

The trigger mechanism of claim 1, wherein the trigger member is adjustably spring biased toward the set position.

### Claim 5 (depends on 1)

The trigger mechanism of claim 1, further comprising a manual safety mechanism.

### Claim 6 (depends on 5)

The trigger mechanism of claim 5, wherein the safety mechanism includes member with a portion pivotally mounted to the housing.

### Claim 7 (depends on 6)

The trigger mechanism of claim 6, wherein the safety mechanism is movable between SAFE and FIRE positions and is configured to, when in the SAFE position, mechanically block movement of the trigger member from its set position.

### Claim 8 (depends on 7)

The trigger mechanism of claim 7, wherein the safety mechanism is further configured to, when in the SAFE position, mechanically block movement of the trigger dog.

### Claim 9 (depends on 1)

The trigger mechanism of claim 1, further comprising a bolt stop/release mechanism mounted on and captive to the housing without attachment to a receiver.