US3163952A

US3163952A - Barrel-receiver mounting for firearms

Info

Publication number: US3163952A
Application number: US282988A
Authority: US
Inventors: Henry A Into
Original assignee: Olin Corp
Current assignee: Olin Corp
Priority date: 1963-05-24
Filing date: 1963-05-24
Publication date: 1965-01-05
Anticipated expiration: 1982-01-05

Description

Jan. 5, 1965 H. A. INTO 3,163,952

BARREL-RECEIVER MOUNTING FOR FIREARMS Filed May 24, 1963 INVENTOR. HENRY A 1N 7'0 A TTORNEV United States Patent 3,163,952 BARREL-RECEIVER MOUNTEJG FOR FIREARMS Henry A. Into, Wallingford, Conn, assignor to (Him Mathieson Chemical Corporation, a corporation of Virginia Filed May 24, 1963, Ser. No. 282,988 Claims. (Cl. 4275) This invention relates to the apparatus and method of removably joining the barrel of a firearm such as a shotgun or rifle to the receiver.

This invention more particularly relates to the method and means of removably joining the barrel of a firearm to the receiver so that the barrel is readily removable and is securely locked relative to the receiver against rotational movement. The barrel is removed from the receiver according to this invention by direct axial pull on the barrel. The alignment of the barrel and the receiver is positively controlled by interlocking surfaces on the barrel and on the receiver.

According to this invention, a barrel receiving opening is formed in the front face of a receiver. A step is provided on the front face of the receiver extending approximately across the diameter of the hole for the barrel. A flange on the barrel extends approximately halfway around the barrel and interlocks with the step on the front of the receiver to prevent rotational movement of the barrel relative to the receiver.

A magazine tube or other member is securely mounted in another opening in the front face of the receiver below the barrel, and has a threaded end portion to receive a magazine cap. Mounted on a forward portion of the barrel is a magazine tube bracket which is adapted to slide over the tubular magazine as the barrel is mounted in the receiver. The magazine cap is then screwed onto the magazine tube and engages the magazine tube bracket. In assembled condition, the magazine tube is in tension and the barrel is in compression. The barrel is therefore always being urged toward the receiver in interlocked relationship.

This invention provides a simple and economical method of removably joining a barrel to the receiver in a shotgun rifle or similar firearm. This invention replaced the more expensive and cumbersome known methods of joining a barrel to a receiver in a firearm which include providing separate key means, forming non-cylindrical mating surfaces on the barrel and the receiver, and screw-threadedly attaching the barrel to the receiver.

This invention will now be described in detail with reference to the accompanying drawings in which:

FIGURE 1 is a side view showing a barrel and a receiver removably secured together according to this invention.

FIGURE 2 is a perspective view showing the details of the stepped receiver and flanged barrel prior to assembly in the manner according to this invention.

Refering now to FIGURE 2 of the drawings, a receiver 1 is shown having an opening 2 in the forward face thereof to accommodate the barrel 3 of a firearm. As clearly shown in FIGURE 2, the upper portion of the receiver around opening 2 is cut away as indicated at 4 to provide a step having support surfaces 5 and 6. According to this invention, the step may be formed in the receiver by cutting away a portion of the receiver approximately across the the diameter of the hole 2 which receives barrel 3. Step 4 may be also formed as the receiver is cast or otherwise fabricated. Barrel 3 is provided with a flange '7 which extends circumferentially approximately halfway around the barrel. Flange 7 terminates in a pair of support surfaces 8 and 9 which are adapted to mate with surfaces 5 and 6 on the receiver 1 to prevent rotation of the barrel relative to the receiver.

Referring now to FIGURE 1, the barrel 1 is provided with a magazine tube bracket 10 rigidly secured to the barrel. The bracket 10 is adapted to slide over and surround a tubular magazine 11 which is rigidly mounted in the receiver and extends generally parallel to the barrel. A forearm 12 is slidably or rigidly mounted on the magazine tube. The forearm is slidably mounted in slide action firearms and rigidly mounted in other types. A ball detent'13 is mounted in the magazine tube bracket 10 and spring urged outwardly toward the end of the tubular magazine 11. A magazine cap 14 is screwthreadedly mounted on the forward end of the tubular magazine. Serrations 15 are provided in the magazine cap which engage ball detent 13 to retain the magazine cap 14 in a tightened condition and prevent accidental loosening of the magazine cap.

To assemble the firearm of this invention, the barrel 3 is moved axially toward the receiver in the manner indicated in FIGURE 2. The end of the barrel 3 is received in opening 2 of the receiver and support surfaces 6, 8 and 5, 7 interlock to prevent rotation of the barrel relative to the receiver. During the axial movement of the barrel 3 toward receiver 1, magazine tube bracket 10 is slipped over the tubular magazine 11 as seen in FIG- URE 1. Magazine cap 14 is then threaded onto the end of tubular magazine 11 and engages the magazine bracket 10 to prevent axial movement of bracket 10 and barrel 3 away from the receiver. By this arrangement, the tubular magazine which is rigidly connected to the receiver is placed in tension and urged away from the receiver. The barrel 3 is placed in compression and urged toward the receiver. Interlocking surfaces 5, 6, 7 and 8 prevent rotation of the barrel relative to the receiver.

The resulting structure is readily assembled and disassembled and alignment of the barrel and receiver is positive and simple. This invention has been described in detail with reference to a preferred embodiment shown in the drawings. All modifications and design changes are contemplated which are within the spirit and scope of the appended claims.

I claim:

1. In a firearm including a receiver and a barrel re movably secured to said receiver, said receiver having an opening in a forward face thereof to receive a rear portion of said barrel, flange means partially surrounding said rear portion of said barrel, a recess in the forward face of said receiver providing step means, said step means operatively engaging the extremities of said flange means to align said barrel with said receiver in assembled condition and prevent rotation of said barrel relative to said receiver.

2. The device of claim 1 in which a tubular magazine is connected to said receiver and extends below and substantially parallel to said barrel, a magazine tube bracket mounted on said barrel operative to substantially surround a portion of said magazine tube in assembled condition, and a magazine tube cap secured to the free end of said magazine tube and engaging said bracket to prevent axial movement of said barrel relative to said receiver.

3. A takedown for a firearm including a receiver, a barrel removably connected to said receiver, an opening in a forward face of said receiver to accommodate a rear portion of said barrel, a flange partially surrounding said barrel and terminating in first abutting surfaces, a step formed in the forward portion of said receiver having second abutting surfaces operatively engaging said first abutting surfaces to insure alignment and prevent rotation of said barrel relative to said receiver in assembled condition.

4. The device of claim 3 including a tubular member rigidly affixed to said receiver and extending substam References Gated by the Examiner UNITED STATES PATENTS Johnson 4275 Moench 42--49 Simpson 42-75 Horan 42-17 Pinckney et al 42-49 0 BENJAMIN A. BORCHELT, Primary Examiner.

Claims

1. IN A FIREARM INCLUDING A RECEIVER AND A BARREL REMOVABLY SECURED TO SAID RECEIVER, SAID RECEIVER HAVING AN OPENING IN A FORWARD FACE THEREOF TO RECEIVE A REAR PORTION OF SAID BARREL, FLANGE MEANS PARTIALLY SURROUNDING SAID REAR PORTION OF SAID BARREL, A RECESS IN THE FORWARD FACE OF SAID RECEIVER PROVIDING STEP MEANS, SAID STEP MEANS OPERATIVELY ENGAGING THE EXTREMITIES OF SAID FLANGE MEANS TO ALIGN SAID BARREL WITH SAID RECEIVER IN ASSEMBLED CONDITION AND PREVENT ROTATION OF SAID BARREL RELATIVE TO SAID RECEIVER.