# US 8,464,454 B2 · Modular adaptive gun

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- Number: US 8,464,454 B2
- Document ID: US8464454B2
- Status: Granted
- Kind: B2
- Application number: 13/006,998
- Filed: 2011-01-14
- Published: 2012-07-19
- Granted: 2013-06-18
- Earliest claimed: 2011-01-14
- Assignees: Crosman Corporation
- Applicants: James Martin; Scott Pilkington
- Inventors: James Martin; Scott Pilkington
- Web page: https://patentgrep.com/patent/US8464454B2

## CPC

- F41A 11/02: Modular concepts, e.g. weapon-family concepts
- F41A 3/66: Breech housings or frames; Receivers
- F41A 19/12: Sears; Sear mountings
- F41A 19/14: Hammers, i.e. pivotably-mounted striker elements; Hammer mountings
- F41A 19/31: Sear arrangements therefor (F41A19/33 takes precedence)
- F41A 19/44: Sear arrangements therefor (F41A19/46 takes precedence)
- Y10T 29/49826: Assembling or joining
- F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An upper receiver is provided for cooperatively engaging a lower receiver, wherein the lower receiver includes at least a trigger and a lower hammer. The upper receiver includes an upper sear movable in response to movement of the lower hammer, thereby permitting an upper hammer in the upper receiver to actuate a valve in the upper receiver and pass a motive gas to a firing chamber and thereby expel a projectile through a barrel of the upper receiver.

## Claims

### Claim 1

An upper receiver for cooperatively engaging a lower receiver having a trigger and a lower hammer, the lower hammer movable between a loaded orientation and a firing orientation, the upper receiver comprising:
(a) an upper hammer movable between a cocked position and a firing position; and
(b) an upper sear movable between a release position and a retaining position, the retaining position of the upper sear retaining the hammer in the cocked position, and the upper sear in the release position permitting movement of the upper hammer to the firing position, the upper sear moving from the retaining position to the release position in response to the lower hammer moving from the loaded orientation to the firing orientation.

### Claim 2 (depends on 1)

The upper receiver of claim 1, further comprising a lockout link movable between a lockout orientation and a firing orientation, the lockout link in the lockout orientation precluding movement of the upper sear to the release position, and the lockout link in the firing orientation permitting movement of the upper sear to the release position.

### Claim 3 (depends on 2)

The upper receiver of claim 2, further comprising a carriage movable between a load position and a fire position, the carriage including a shoulder to contact the lockout link in the firing orientation of the lockout link.

### Claim 4 (depends on 3)

The upper receiver of claim 3, further comprising a carriage spring acting on the carriage and urging the carriage to the load position.

### Claim 5 (depends on 1)

The upper receiver of claim 1, further comprising a charging handle connected to the upper hammer, the charging handle movable to displace the upper hammer from the firing position to the cocked position.

### Claim 6 (depends on 5)

The upper receiver of claim 5, wherein the movement of the charging handle displaces the lower hammer from the firing orientation to the loaded orientation.

### Claim 7 (depends on 1)

The upper receiver of claim 1, further comprising a kicker connected to the upper hammer, the kicker selected to contact the lower hammer upon the upper hammer moving from the firing position to the cocked position.

### Claim 8 (depends on 1)

The upper receiver of claim 1, further comprising a barrel.

### Claim 9 (depends on 8)

The upper receiver of claim 8, further comprising a motive gas reservoir and a valve body, the valve body fluidly intermediate the motive gas reservoir and the barrel.

### Claim 10

A method comprising:
(a) engaging an upper receiver with a lower receiver to form a gun and operably interconnect a trigger and lower hammer in the lower receiver with an upper hammer and upper sear in the upper receiver, wherein movement of the trigger to a firing position results in movement of the upper hammer from a cocked position to a firing position.

### Claim 11

A method comprising:
(a) releasing a lower hammer in a lower receiver by moving a trigger in the lower receiver from a non-firing position to a firing position; and
(b) contacting the released lower hammer with a portion of an upper receiver to release an upper sear in the upper receiver to move an upper hammer in the upper receiver from a cocked position to a firing position.