Capacity increasing magazine extension in semi-automatic and pump-action hunting rifles

Abstract

The present invention relates to a magazine extension which has been developed for use in semi-automatic and pump-action hunting rifles and which increases the magazine capacity without losing spring force by easily connecting the end of the rifle to the magazine tube.

Claims

1. A magazine extension, comprising: a. a magazine extension body having at least one wedge channel wherein the wedge channel has one end extending into an extension body cover and the other end extending into a kit clearance; b. at least one extension spring guide having at least one spring guide wedge protrusion through which the extension spring guide engages with the wedge channel and moves within the wedge channel; c. at least one extension spring with one end connected to the extension spring guide and the other end connected to the extension body cover; and d. wherein the extension body cover has a cover wedge protrusion seated in the wedge channel.

2. The magazine extension of claim 1, wherein the extension body cover having at least one cover pin hole overlapping with a retaining pin hole of the extension body and connected with the retaining pin hole by passing a retaining pin therethrough.

3. The magazine extension of claim 1, wherein the extension spring guide having on the front part a magazine spring assembly protrusion inserted into a main magazine spring and having on the rear part of the extension spring guide an extension spring centering slot wherein the extension spring is seated.

Description

DESCRIPTION OF THE FIGURES

(1) FIG. 1: View of the Hunting Rifle without Magazine Extension

(2) FIG. 2: View of the Magazine Tube and Magazine Spring Position

(3) FIG. 3: General View of the Hunting Rifle with Magazine Extension Attached

(4) FIG. 4: View of the Extension Spring

(5) FIG. 5: Front perspective view of Extension Spring Guide

(6) FIG. 6: Rear perspective view of Extension Spring Guide

(7) FIG. 7: Front perspective view of Extension Body Cover

(8) FIG. 8: Side perspective View of Extension Body Cover

(9) FIG. 9: View of Extension Body Cover Retaining Pin

(10) FIG. 10: Side perspective View of Magazine Extension Body

(11) FIG. 11: Cross-sectional View of Magazine Extension Body

(12) FIG. 12: Perspective view of Magazine Extension Body Wedge Channels

REFERENCE NUMBERS

(13) 1. Magazine Tube 2. Main Magazine Spring 3. Magazine Cover 4. Magazine Extension Body 5. Extension Spring Guide 6. Extension Spring 7. Extension Body Cover 8. Retaining Pin 9. Wedge Channel 10. Body Notches 11. Retaining Pin Hole 12. Running Clearance 13. Kit Clearance 14. Spring Guide Wedge Protrusions 15. Magazine Spring Assembly Protrusion 16. Extension Spring Centering Slot 17. Cover Wedge Protrusions 18. Cover Pin Hole 19. Interconnection Kit

DETAILED DESCRIPTION

(14) The present invention relates to a magazine extension and is intended to increase the available magazine capacity.

(15) In FIG. 12 the magazine extension body (4) is shown (also shown in FIGS. 10, 11). The magazine extension body (4) is cylindrical and has a running clearance (12) in which an extension spring guide (5) and an extension spring (6) (shown in FIG. 11) are positioned. Two wedge channels (9) run through the whole length of the magazine extension body (4).

(16) At one end of the magazine extension body (4), there is a screwed interconnection kit (19) for mounting to the magazine tube (1) (shown in FIG. 2). Body notches (10) (shown in FIG. 10) are formed to provide fixation when the interconnection kit (19) is connected to the magazine tube (1). At the other end of magazine extension body (4), there are retaining pin holes (11) in which the extension body cover (7) (shown in FIGS. 11, 8, 7) is fixed through the retaining pin (8) (shown in FIGS. 11, 9). Magazine extension body (4) may be formed through injection molding of polymer material by chip-free production and by machining from metal and metal alloy materials.

(17) In FIG. 5 the other main element that constitutes the magazine extension, the extension spring guide (5), is shown. The extension spring guide (5) with the spring guide wedge protrusions (14) has the shape of cylindrical bushing. At one end there is a magazine spring assembly protrusion (15) that gets seated into the magazine spring (2) (shown in FIG. 2), and provides guidance for main magazine spring (2), at the other end there is an extension spring centering slot (16) (shown in FIG. 6) in which the extension spring (6) is seated. The extension spring guide (5) transfers the power from the extension spring (6) to the main magazine spring (2). Instead of forming a single, long and weak main magazine spring (2), the ammunition becomes ready for firing by being fed with the extension spring (6) of the main magazine spring (2) in the present system. The extension spring guide (5) may also be made of a desired material like the magazine extension body (4).

(18) The extension spring (6) is in the form of a compression spring of sufficient length and diameter to feed the existing main magazine spring (2).

(19) In FIG. 8, another main element of the present invention, the extension body cover (7) is shown. The extension body cover (7) is in the form of a capped bushing or a column head. There are cover wedge protrusions (17) on said extension body cover (7). There are cover pin holes (18) which make it possible to secure said extension body cover (7) connected to the magazine extension body (4). Securing is carried out by inserting the retaining pin (8) through the retaining pin holes (11) and the cover pin holes (18) overlapping, i.e. aligning, with the engagement of the cover wedge protrusions (17) in the wedge channel (9).

(20) The operating principle of the magazine extension according to the present invention is as follows:

(21) Initially, the extension spring guide (5) is positioned inside the magazine extension body (4). The extension spring guide (5) is inserted into said running clearance (12) by inserting the spring guide wedge protrusions (14) into two wedge channels (9) of the magazine extension body (4). The magazine spring assembly protrusion (15) faces the running clearance (12). The spring guide wedge protrusions (14) of the extension spring guide (5) are prevented from protruding out of the magazine extension body (4) based on the end of the wedge channels (9) in the running clearance (12) with the interior of the magazine extension body (4).

(22) The extension spring (6) is then pushed onto the extension spring guide (5) from the running clearance (12) formed in the magazine extension body (4). Thus, one end of the extension spring (6) fits into the extension spring centering slot (16) (shown in FIG. 6) of the extension spring guide (5). The other end of the extension spring (6), is held by the extension body cover (7), which is connected to the magazine extension body (4). The cover wedge protrusions (17) fit into the wedge channels (9) and the retaining pin (8) is passed through the retaining pin hole (11) to secure it. The cover wedge protrusions (17) ensure the alignment of the cover pin hole (18) and the retaining pin hole (11). Thus, when the retaining pin (8) is passed through the retaining pin hole (11), said retaining pin (8) passes through the cover pin hole (18) (shown in FIG. 11). By inserting the retaining pin (8), the magazine extension is formed according to the present invention.

(23) In order to connect the magazine extension according to the present invention to the magazine tube (1) which is shown in FIG. 2, the magazine cover (3) on the rifle shown in FIG. 1 is initially removed. After the removal of the magazine cover (3), the main magazine spring (2) extends slightly out from the magazine tube (1). This protruding main magazine spring (2) is aligned in order to fit into the kit clearance (13) of the interconnection kit (19). Thus, the main magazine spring (2) automatically engages with the magazine spring assembly protrusion (15) at the end of the extension spring guide (5). The magazine tube (1) fits into the interconnection kit (19) through the kit clearance (13). Thus, the attachment of the magazine extension to the rifle is completed.

(24) The body notches (10) in the interconnection kit (19) provide full attachment to the magazine tube (1). Thus, in any jolt, unwanted movement of the interconnection kit (19) and the magazine extension body (4) connected to said interconnection kit (19) is prevented.