# US 12,000,666 B2 · Trigger group for semi-automatic firearms

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- Number: US 12,000,666 B2
- Document ID: US12000666B2
- Status: Granted
- Kind: B2
- Application number: 17/372,338
- Filed: 2021-07-09
- Published: 2021-11-04
- Granted: 2024-06-04
- Earliest claimed: 2015-12-04
- Assignees: Franklin Armory Holdings, Inc.
- Applicants: Franklin Armory Holdings, Inc.
- Inventors: Ryan Paul Fellows; Jay Leonard Jacobson
- Web page: https://patentgrep.com/patent/US12000666B2

## CPC

- F41A 19/46: Arrangements for the selection of automatic or semi-automatic fire
- F41A 17/74: Hammer safeties, i.e. means for preventing the hammer from hitting the cartridge or the firing pin (F41A17/02 - F41A17/40 take precedence)
- F41A 19/10: Triggers; Trigger mountings
- F41A 19/12: Sears; Sear mountings
- F41A 19/14: Hammers, i.e. pivotably-mounted striker elements; Hammer mountings
- F41A 19/24: Release-trigger mechanisms, i.e. the striker element being released during the return movement of the trigger subsequent to trigger pull
- F41A 19/43: in bolt-action guns
- F41A 19/44: Sear arrangements therefor (F41A19/46 takes precedence)
- F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE

## Abstract

Trigger groups for semi-automatic firearms have a frame, a hammer connected to the frame and movable between a cocked position and a striking position, the hammer being biased toward the striking position, a trigger element connected to the frame and movable by a user between a forward position and a rearward position, a selector connected to the frame and movable between at least a first position and a second position, a disconnector having a hammer engagement facility adapted to selectably engage the hammer, a disconnector control element movable between a first control position and a second control position, the disconnector being operably engaged to the disconnector control element, the disconnector operable to move in a first range of motion when the disconnector control element is in the first control position, and in a second range of motion when the disconnector control element is in the second control position.

## Claims

### Claim 1

A trigger assembly for a firearm comprising:
a frame;
a hammer connected to the frame and movable between a cocked position and a striking position;
the hammer being biased toward the striking position;
a trigger element connected to the frame and movable by a user between a forward position and a rearward position;
a single selector connected to the frame and movable between at least a safe position, a first position, and a second position;
a disconnector assembly having a hammer engagement facility adapted to selectably engage the hammer;
the disconnector assembly having a disconnector spacer moveable between at least a first condition being held disengaged by the hammer and a second position being engaged;
the disconnector assembly movable between a first control condition and a second control condition;
the disconnector assembly operable to move in a first range of motion when in a first control condition; and
the disconnector assembly operable to move in a shorter range of motion different from the first range of motion when in a second control condition, such that the trigger assembly operates in a first mode when the selector is in the first position, and in a second mode when in the second position.

### Claim 2 (depends on 1)

The trigger assembly of claim 1 wherein in the first mode the hammer moves to the striking position only in response to pulling the trigger to the rearward position, and in the second mode the hammer moves to the striking position in response both to pulling the trigger to the rearward position and releasing the trigger to the forward position.

### Claim 3 (depends on 1)

The trigger assembly of claim 1 wherein the disconnector assembly is free of direct contact with the selector.

### Claim 4 (depends on 1)

The trigger assembly of claim 1 wherein the disconnector assembly is pivotally connected to the trigger element, has a hammer retention hook, the disconnector assembly is rotationally biased in a direction with the hammer retention hook biased toward the hammer toward a forward limit, and wherein the forward limit for the first range of motion is farther forward than the forward limit for the second range of motion.

### Claim 5 (depends on 4)

The trigger assembly of claim 4 wherein the trigger element includes a sear and the hammer includes a hammer hook adapted for selective engagement of the sear and wherein after the trigger has been pulled to discharge the rifle when the selector is in the first position the sear is spaced apart from the hammer hook by a first amount, and wherein after the trigger has been pulled to discharge the rifle when the selector is in the second position the sear is spaced apart from the hammer hook by a second amount greater than the first amount such that after release of the trigger the hammer is restrained by the sear when the selector is in the first position, and the hammer hook bypasses the sear and the firearm is discharged when the selector is in the second position.