Patent Application
20110113668
a. Field of the Invention
The present invention relates generally to ammunition magazines for use in firearms, and, more particularly, to an apparatus in which a plurality of individual magazines is mounted together to form a multiple magazine assembly in which the individual magazines are alternatively receivable in the firearm.
b. Related Art
Many firearms utilize magazines to hold a supply of ammunition. One common type is a detachable magazine that can be removed from the firearm to be loaded, and then reinserted in a well or other opening leading to the receiver of the gun. Detachable magazines have the particular advantage that multiple magazines can be loaded ahead of time and then used one after another in a rapid fashion when needed; the convenience of having multiple loaded magazines on hand is offset, however, by the need to somehow carry them, for example, in a pouch or pocket, for example.
One category of firearms commonly using detachable magazines is semiautomatic rifles. A particular benefit of semiautomatic rifles is the rapid rate of fire made possible by the auto-loading action, and this advantage is complemented by the rapid-change nature of detachable magazines. This combination of features is notably successful in the case of .22 rimfire semiautomatic rifles, which enjoy the added advantage of comparatively inexpensive ammunition. One non-limiting example of such a rifle is the Ruger Model 10/22™.
Over the years, many attempts have been made to give semiautomatic rifles increased magazine capacity. The most basic approach has been to simply increase the size of the magazine, as exemplified by long vertical/curved magazines (e.g., “banana clips”) and large drum magazines. This approach suffers the obvious problems of bulk and weight, but perhaps the most significant drawback has been the difficulty in achieving reliable feeding of the ammunition, owing in part to the use of long springs, ramps and other mechanisms generally inherent in such devices. Many of the feeding problems also stem from the fact that the geometry of the cartridges is based on their principal purpose of functioning within the chamber/barrel of the firearm rather than being optimized for being fed in long rows or columns; this is particularly problematic in case of .22 rimfire cartridges (e.g., .22 long rifle, .22 long, .22 short), which are old designs that originated long before the advent of semiautomatic rifles. The intractable nature of this problem is illustrated by the ongoing struggle with reliable feeding encountered with long “banana” clips and similar magazines presently marketed for .22 semiautomatic rifles.
As an alternative to simply larger/longer magazines, some efforts have been made at joining a plurality of magazines together in a composite structure. A basic approach has been to clamp or similarly connect a plurality of otherwise standard magazines end-to-end or side-to-side so that the magazines can be inverted or shifted side-to-side to feed a fresh supply of rounds into the firearm; examples of efforts in this vein are shown in U.S. Pat. Nos. 7,194,837; 7,668,479; 5,279,059; 4,685,238; 4,484,403; 3,191,333; and 2,289,067. As a group, such devices tend to create excessively bulky projections, to the point of rendering the rifle unwieldy, as well as being susceptible to separation and/or damage during use in the field. A related approach is illustrated in U.S. Pat. No. 5,615,506, in which a plurality of long, curved, somewhat “banana-shaped” clips are joined together by cooperating external lugs and grooves, which offers the advantage of high capacity but which creates a large, star-shaped mass below the rifle that is bulky and subject to being struck against obstructions while being carried; also, a reliance on an elongate clip mechanism renders the device susceptible to potential feeding problems.
A notable advantage of the Ruger Model 10/22™ (and certain other rifles) in this regard is the use of a rotary drum mechanism within the detachable magazine, which combines the advantages of compactness and extremely reliable feeding of cartridges.
Due to the excellence of its design, many or most Ruger 10/22™ shooters have acquired multiple factory magazines to go with their rifle or rifles. The device shown in U.S. Pat. No. 4,447,976 represents an attempt to capitalize on this situation, using two-sided and four-sided spacer-shaped mounts to which multiple units of the standard, rotary Ruger 10/22™ magazine are glued. Although successful to the extent of allowing multiple stock magazines to be used as a group, a very serious drawback of the apparatus shown in U.S. Pat. No. 4,447,976 is that once glued together the magazines cannot be removed to be replaced or used individually. For example, in the event that one of the rotary magazines become damaged, it cannot be removed, and so the serviceable magazines must remain connected to the defective unit for the duration; this is a significant problem, since the original magazines are not inexpensive, and an assembly containing four of the units represents a significant investment for the shooter.
Accordingly, there exists a need for an apparatus for joining together multiple ammunition magazines to form an assembly in which the individual magazines are alternately insertable into the firearm, while keeping the assembly compact and avoiding excessive bulk and projections that would encumber use of the firearm. Furthermore, there exists a need for such an apparatus that is able to make use of multiple original equipment-type magazines. Still further, there exists a need for such an apparatus that is able to use original equipment rotary-type detachable magazines, so as to avoid the feeding problems common with banana-type magazines and other magazines in which long stacks or rows of cartridges are advanced in a generally linear direction. Still further, there exists a need for an apparatus in which one or more of the individual magazines can be removed if necessary or desired, in order to effect a disassembly or to replace a damaged or otherwise inoperative magazine in the assembly. Still further, there exists a need for such an apparatus in which the components are economical to manufacture and durable and long-lasting in use.
The present invention has solved the problems noted above, and is an apparatus for detachably joining together a plurality of individual ammunition magazines to form a multiple magazine assembly in which the individual magazines are alternately insertable into a firearm.
In the broad aspect, the apparatus comprises: (a) a connector member having a plurality of mounting portions, each of the mounting portions having at least one locating feature that is detachably receivable in a base recess of the individual magazines, (b) a coupling member having a plurality of connector portions, each of the connector portions having at least one retaining feature that is detachable receivable in a forward recess of the individual magazines, and (c) means for selectively inserting the connector portions of the coupling member into the forward recesses of the individual magazines with the magazines received on the mounting portions, so as to detachably retain the magazines on the connector member to form the multiple magazine assembly.
The at least one locating feature of each of the mounting portions on the connector member may comprise first and second outside wall surfaces that are spaced apart laterally so as to fit within and engage first and second side wall surfaces of the base recesses of the individual magazines so as to hold the magazines against lateral movement relative to the connector member. The at least one locating feature of each of the mounting portions may also comprise forward and rearward outside wall surfaces that are spaced apart longitudinally so as to fit within and engage forward and rearward wall surfaces of the base recesses of the individual magazines so as to hold the magazines against longitudinal movement relative to the connector member. The at least one locating feature may further comprise first and second outwardly-projecting locating ribs, the first and second locating ribs having the outside wall surfaces formed on outwardly-facing sides thereof.
The at least one retaining feature of the connector portions of the coupling member may comprise a retaining tab that projects from the connector portion so as to extend into the forward recess of the individual magazine to be positioned above a forwardly projecting ledge portion located therein.
The connector member may comprise a connector block having a plurality of mounting positions at spaced locations about sides thereof, and the coupling member may comprise an end plate that is mounted to an end of the connector block. The mounting positions may be at radially-spaced locations about the sides of a connector block, and in a preferred embodiment there may be three mounting portions at equidistant radially-spaced locations about the connector block, for holding the three of the individual magazines in the assembly.
The connector portions of the coupling member may comprise radially-extending flange portions of the coupling plate, each of the flange portions having a retaining tab located proximate an outer end thereof.
The means for selectively inserting the connector portions of the coupling member into the forward recesses of the individual magazines may comprise coaxially aligned bores formed in the connector block and a coupling plate, and a screw member that is received in the coaxially aligned bores so that in response to tightening of the screw member the coupling plate having connector portions thereon is translated towards the connector block having the mounting portions thereon.
In a preferred embodiment, the apparatus comprises: (a) a connector member, comprising a connector block having forward and rearward ends and a perimeter, an axial bore extended between the forward and rearward ends of the connector block, and a plurality of outwardly directed mounting faces formed at radially-spaced locations about the perimeter of the connector block, each of the mounting faces comprising at least one raised base portion that is slidingly receivable in an upwardly extending recess in the base end of one of the individual magazines, the base portion having front, rear and side walls spaced apart so as to form a sliding interft with the walls of the recess, and first and second substantially parallel receiving ridges projecting outwardly proximate longitudinal side edges of the mounting face for being received in the upwardly-extending recess in the base of one of the individual magazines, the locating ridges having outside surfaces that are spaced apart so as to form an interfit with the side walls of the recess so as to hold the individual magazine against moving laterally on the mounting face; and a coupling member comprising an end plate mounted at the forward end of the connector block and having forward and rearward ends and a perimeter, an axial bore extending between the forward and rearward ends of the end plate in coaxial alignment with the bore of the connector block, a plurality of connector portions formed at radially-spaced locations about the perimeter of the end plate that correspond to the locations of the mounting faces of the connector block, each of the connector portions comprising a connector flange extending outwardly from the axial bore, and a retaining tab projecting rearwardly proximate an outer end of the connector flange for being received in a rearwardly extending recess in the forward side of one of the individual magazines, the retaining tab having a lower surface that forms an interfit with an upper surface of the ledge portion of the forwardly-extending recess so as to hold the individual magazine from moving outwardly relative to the connector portion; and an adjustment screw that is received in the coaxially aligned bores of the connector block and the end plate, the adjustment screw being selectively adjustable to translate the end plate between a forward position in which the coupling plate is spaced from the connector block so that the retaining tabs thereon are withdrawn from the recesses in the forward sides of individual magazines so as to allow the magazines to be removed from or placed on the mounting faces, to a rearward position in which the coupling plate is located proximate the connector block so that the retaining tabs thereon are inserted into the recesses in the forward sides of the individual magazines so as to secure the individual magazines in place on the mounting faces of the connector block.
These and other features and advantages of the present invention will be more fully understood and appreciated from a reading of the following detailed description with reference to the accompanying drawings.
As used in this description and the appended claims, the terms “forward”, “rearward”, “upper”, “lower” and so on refer to the orientation of various parts as the gun is held for normal use, as shown in
As can be seen in
Now, referring again to
As will be described in greater detail below, the mounting faces of the connector block, including the locating ribs, are configured to engage the inside wall surfaces of recesses 56, so as to locate the individual magazine, and hold the position against both transverse (side-to-side) and longitudinal (rearward) movement. End plate 84, in turn, engages the recesses 50 in the forward sides of the magazines to hold each magazine against movement in an outward (radial) direction relative to the connector block.
As can be seen with reference to
The coupling plate 84 further includes a rearwardly projecting hub formed by a portion of tubular sleeve 100, that engages the forward end 116 of the tubular sleeve of the connector block when the pieces are assembled. With the sleeves coaxially aligned, a screw 120 (e.g., a machine or cap screw) is passed through the coupling plate and connector block and is threaded into the nut 98 on the rearward side of the latter, a washer 122 being positioned between the front hub of the coupling plate and the head of the screw to facilitate tightening of the latter.
The connector block 82 and coupling plate 84 are suitably formed of high strength molded plastic material, such as fiber-filled nylon, although it will be understood that various other plastics or non-plastic materials may be used. Similarly, the screw, washer and nut are suitably formed of steel or other metal, but in some embodiments plastic or other non-metallic materials may be used.
The engagement established between the connector block and coupling plate and the individual magazines is shown in greater detail in
As can be seen in
As can be seen with further reference to
The engagement of the outer surfaces of the mounting face (including the locating ribs) with those of the recess 56 hold the magazine against both longitudinal and lateral movement relative to the connector block. As a group, therefore, the ribs and other features of the mounting faces 56 serve to locate the individual magazines in stationary positions relative to the connector block, with the bases of the magazines positioned against the block and the feed ends of the magazines facing outwardly therefrom. The coupling plate 84, in turn, serves principally as a retainer to releasably hold the magazines in their stationary positions and prevent them separating from the connector block.
As can be seen in
For ease of illustration,
In an exemplary sequence for forming the multi-magazine assembly, the machine screw 120 is first inserted through the washer 122 and the bore in coupling plate 84, and then passed through the bore 94 of the coupling block and threaded into the nut 98 that is retained in the hexagonal recess 148 on the rearward end of the block. With the screw 120 kept sufficiently loose to provide clearance to allow the ledge portions 54 of the magazines to pass under the retaining tabs 106, the individual magazines 30 are placed against the mounting faces 6a-c so that the locating ribs thereon enter recesses 56 to position the clips in the manner described above. As can be seen with reference to
Once in place on the connector block, the array of clips is held together temporarily, for example, by the fingers of the user's off hand or by a rubber band, string or other aid, and the screw 120 is tightened so as to force the retaining tabs 106 into the end recesses 50. Further tightening (e.g., with a screwdriver or allen wrench) drives the retaining tabs firmly into the recesses so that they press tightly over the ledges 54 and also force the forward wall 64 of the recess hard against the front surfaces of the locating ribs and plug-shaped base 134, creating a rigid and stable assembly in which the individual magazines are held firmly in place. A rearwardly projecting portion of the axial sleeve of the coupling plate forms a hub 150 that bears against the front of the sleeve 92 of the connector block so as to prevent further over-tightening and potential distortion of the assembly. The generally triangular intermediate flange portions 112a-c, in turn, fit into the gaps between the corners of adjacent magazines so as to block and prevent twisting/turning of the magazines on the connector flanges.
In the event that an individual magazine becomes damaged or otherwise nonfunctional, or should the shooter simply wish to use one or more of the magazines separate from the assembly, the screw 120 can be loosened so as to move the coupling plate outwardly from the connector block by a distance to withdraw the retaining tabs from recesses 50, thus releasing the magazines so that one or more can be removed as desired. A substitute or the same magazine or magazines can subsequently be inserted in the assembly if desired and the screw retightened in the manner described above.
The radial array of magazines formed in the illustrated embodiment has the advantage of compactness while providing adequate clearance beneath the rifle for the non-inserted magazines, and also allows magazines to be charged with a simple turn of the wrist. It will be understood, however, that non-radial configurations may be used in some embodiments such as a “T-” or “H-” shaped configuration for example. It will also be understood that the basic two-piece, plus adjusting screw, mechanism of the illustrated embodiment provides significant advantages in terms of simplicity, low cost and durability, however some embodiments may utilize spring-loaded, articulated or elastomeric mechanisms, for example, in place of or in addition to the adjustable screw mechanism to move the cooperating members together and apart to capture and release the magazines.
It is therefore to be recognized that various alterations, modifications, and/or additions may be introduced into the constructions and arrangements of parts described above without departing from the spirit or ambit of the present invention as defined by the appended claims.
