US20060254414A1 - Firearm with rear regulator - Google Patents
Firearm with rear regulator Download PDFInfo
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- US20060254414A1 US20060254414A1 US11/339,187 US33918706A US2006254414A1 US 20060254414 A1 US20060254414 A1 US 20060254414A1 US 33918706 A US33918706 A US 33918706A US 2006254414 A1 US2006254414 A1 US 2006254414A1
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- United States
- Prior art keywords
- receiver
- firearm
- bolt carrier
- receiver extension
- regulator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
- F41A19/03—Shot-velocity control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A3/00—Breech mechanisms, e.g. locks
- F41A3/64—Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
- F41A3/78—Bolt buffer or recuperator means
- F41A3/82—Coil spring buffers
- F41A3/84—Coil spring buffers mounted within the gun stock
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A3/00—Breech mechanisms, e.g. locks
- F41A3/64—Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
- F41A3/78—Bolt buffer or recuperator means
- F41A3/90—Fluid buffers
- F41A3/92—Fluid buffers adjustable
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A3/00—Breech mechanisms, e.g. locks
- F41A3/64—Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
- F41A3/78—Bolt buffer or recuperator means
- F41A3/90—Fluid buffers
- F41A3/94—Fluid buffers in combination with spring buffers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Sliding Valves (AREA)
- Special Conveying (AREA)
Abstract
Description
- This application claims the benefit of U.S. Provisional Application No. 60/646,875 filed Jan. 25, 2005 which is incorporated by reference herein in its entirety.
- 1. Field
- The exemplary embodiments disclosed herein relates to automatic or semi-automatic firearms and, more particularly, to automatic and semi-automatic firearms having a rear regulator.
- 2. Brief Description of Related Developments
- The M-4 and M-16 type firearms, along with their commercial versions, are highly desired and widely distributed, around the world, among the law enforcement community, hunters and sporting users, as well as the military and paramilitary. Referring to
FIGS. 1-2 , there is respectively shown a perspective view of a conventional M-4 (or commercial A-4 variant) type firearm 1, and an expanded view of the firearm 1. As seen inFIGS. 1-2 , the firearm 1 generally has alower receiver 2, anupper receiver 4, abarrel 6 and stock 8. Theupper receiver 4 is connected to thelower receiver 2. Thebarrel 6, which is covered by a handguard 10, is connected to theupper receiver 4. Theupper receiver 4 holds thebolt carrier 12 that is operated by anoperating system 14 powered by exhaust gases generated during firing of the firearm 1. As seen inFIG. 2 , thelower receiver 2 may have amounting bracket 2M for mounting areceiver extension 16. The receiver extension may be located within the stock and may provide support to the stock. In conventional M-4 type firearms, thereceiver extension 16 is hollow and provides a housing for theaction spring 18 andbuffer assembly 20. Thebuffer assembly 20 is positioned byspring 18 against thebolt carrier 12, to bias the bolt carrier to its closed position. Hence, as may be realized, operation of the bolt carrier 12 (i.e. sliding back) inside the upper receiver under impetus from the operating system, impinges on thebuffer assembly 20 thereby moving the buffer assembly back inside thereceiver extension 16 and compressing theaction spring 18. Conventional M-4 type firearms cannot be operated immediately after being immersed in water. However, there is a desire among operators for an M-4 type firearm capable of being fired substantially upon removal from water immersion. Further, as seen inFIG. 1 , M-4 type firearms are provided with a safety orfire control selector 22 allowing an operator to select for example, between “Safe”, “Semi” (-automatic) and “Auto” (-matic) modes of operation. When in the “auto” mode of operation, the firing rate of conventional M-4 type firearms is not controllable by the operator. There is a desire for an M-4 type firearm having a controllable or selectable firing rate when operated in the “auto” mode. The exemplary embodiment disclosed herein overcomes, amongst other things, the problems of conventional M-4 type firearms. - In accordance with one exemplary embodiment, an M-4 type firearm is provided. The M-4 type firearm comprises a receiver with a bolt carrier movably located therein. A receiver extension is connected to the receiver with the receiver extension including a spring loaded bolt carrier buffer movable relative to the receiver for effecting return of the bolt carrier to a firing position of the bolt carrier. A regulator is provided on the receiver extension, for enabling movement of the bolt carrier buffer relative to the receiver and effecting automatic or semi-automatic fire when the receiver extension is at least partially filled with water.
- In accordance with another exemplary embodiment, an M-4 type firearm is provided. The M-4 type firearm comprises a receiver with a bolt carrier movably located therein. A receiver extension is connected to the receiver, the receiver extension enclosing a bolt return spring. A regulator valve is coupled to the receiver extension. The bolt return spring effects return of the bolt carrier to a firing position. The regulator valve regulates a firing rate of the firearm.
- In accordance with another exemplary embodiment, an M-4 type firearm is provided. The M-4 type firearm comprises a receiver having a bolt carrier movably located therein. A barrel is coupled to the receiver. A receiver extension is connected to the receiver, the receiver extension having a bolt return spring. An indirect gas operating system is coupled to the barrel. A cycle rate selector is coupled to the receiver extension. The indirect gas operating system cycles the bolt carrier from a firing position into the receiver extension. The bolt return spring effects return of the bolt carrier to the firing position. The cycle rate selector regulates a firing cycle rate of the firearm when in full automatic mode.
- In accordance with another exemplary embodiment, an automatic firearm is provided. The automatic firearm comprises a receiver having a bolt carrier movably located therein. A receiver extension is connected to the receiver, the receiver extension having an interior passage through which the interior of the receiver communicates with the exterior of the firearm. A closure is coupled to the receiver extension, the closure being selectably movable between opened and closed position. The closure in the closed position is more restrictive on fluid flow through the interior passage than when the closure is in the opened position.
- The foregoing aspects and other features of the present invention are explained in the following description, taken in connection with the accompanying drawings, wherein:
-
FIG. 1 is a perspective view of a firearm in accordance with the prior art; -
FIG. 2 is an exploded perspective view of the prior art firearm inFIG. 1 ; -
FIG. 3 is an elevation view of a firearm incorporating features of the present invention in accordance with an exemplary embodiment; -
FIGS. 4A-4B are exploded perspective views of the lower receiver extension of the firearm inFIG. 3 with the receiver extension respectively shown in two different configurations; -
FIGS. 5A-5B are partial exploded views of the end of the lower receiver extension inFIGS. 4A-4B respectively in different configurations; -
FIGS. 6A-6B are end views of the lower receiver extension respectively in the different corresponding configurations shown inFIGS. 4A-4B ; -
FIGS. 7A-7C respectively are an end elevation view, a partial cross-sectional view and partial bottom view of the lower receiver extension; -
FIGS. 8A-8D respectively are a perspective view and an elevation view, plan view and cross-sectional view of a regulator section of the firearm inFIG. 3 ; -
FIG. 9A is an end view of an alternate embodiment lower receiver extension; and -
FIG. 9B is an isometric view of an alternate embodiment regulator. - Referring to
FIG. 3 , there is shown, a side elevation view of anautomatic firearm 30 capable of automatic or semiautomatic fire incorporating features in accordance with an exemplary embodiment of the present invention. Although the exemplary embodiments will be described with reference to the embodiments shown in the drawings, it should be understood that the exemplary embodiments can be embodied in many alternate forms of embodiments. In addition, any suitable size, shape or type of elements or materials could be used. -
Firearm 30 is illustrated inFIG. 3 as an M-4 or M-16 type automatic firearm (or corresponding commercially available variant) for example purposes, and the present invention is applicable equally to any other desired type of firearm capable of automatic or semi-automatic fire.Firearm 30 may have operational features such as disclosed in U.S. Pat. Nos. 5,726,377, 5,760,328, 4,658,702 and 4,433,610, and U.S. patent application Ser. No. 10/836,443, filed Apr. 30, 2004 and U.S. Provisional Patent Application Ser. No. 60/564,895, filed Apr. 23, 2004, all of which are hereby incorporated by reference herein in their entirety.Firearm 30 incorporates features according to the present invention. Thefirearm 30 and its sections described in greater detail below is merely exemplary, and in alternate embodiments thefirearm 30 may have other sections, portions or systems.Firearm 30 may incorporate ahand guard 40, areceiver section 42, abarrel 46, andstock 44. As will be described further below,hand guard 40 may further incorporate vent holes, ribbing, heat shields or double heat shields and liners to facilitate cooling of thebarrel 46 while keepinghand guard 40 at a temperature sufficient for an operator.Hand guard 40 may have features such as disclosed in U.S. Pat. Nos. 4,663,875 and 4,536,982, both of which are hereby incorporated by reference herein in their entirety.Hand guard 40 andreceiver section 42 may be configured to support such rails as a “Piccatiny Rail” configuration as described in Military Standard 1913, which is hereby incorporated by reference herein in its entirety. Thehandguard 40 may house a barrel radiator section for enhanced cooling of thebarrel 46 such as for example disclosed in U.S.provisional application 60/610,703, filed Sep. 17, 2004 and incorporated by reference herein in its entirety. Thebarrel 46 offirearm 30 may also be provided with an active cooling system for example as also disclosed in U.S.provisional patent application 60/610,703 incorporated by reference herein. - As noted before,
firearm 30 in this exemplary embodiment is an M-4 type automatic or semi-automatic firearm.Firearm 30 is thus, except as otherwise described below generally similar to firearm 1 shown inFIGS. 1-2 and described before. Hence, features offirearm 30 similar to features of firearm 1 will not be described in detail below. The bolt carrier 48 (seeFIG. 3 ) in theupper receiver 50 of firearm 30 (similar tobelt carrier 12 in the receiver of firearm 1, shown inFIG. 2 ) may be cycled by a suitable operating system. The operating system may be a direct gas operating system similar tooperating system 14 shown inFIG. 2 . In the exemplary embodiment, the operating systeM-480 (for cycling the bolt carrier 48) offirearm 30 may be an indirect gas operating system, a suitable example of which is disclosed inU.S. Provisional Application 60/610,703 previously incorporated by reference. Thefirearm 30 also has an action spring and buffer assembly similar toaction spring 18 andbuffer assembly 20 inFIG. 2 , for motivating the return stroke of thebolt carrier 48 during its cycle. The action spring and buffer assembly offirearm 30 are housed (similar to spring and buffedassembly FIG. 2 ) within the lower receiverrear extension 50. The lower receiverrear extension 50 offirearm 30, in the exemplary embodiment, has aregulator 52 capable of adjustment by the operator to enablefirearm 30 to be fired substantially immediately upon removal from water or other fluid immersion, as well as provide a selectable firing rate whenfirearm 30 is operated in the “auto” mode as will be described in greater detail below. - Referring now also to
FIG. 4A , there is shown an exploded view of thelower receiver extension 50 andregulator assembly 52. As seen inFIG. 4A , thereceiver extension 50 has a hollow generally cylindrical shape. In alternate embodiments, the lower receiver extension may have any other desired shape. Thefront portion 50F of the receiver extension may have a suitable interface for coupling or otherwise interfacing the receiver extension to thereceiver section 42 offirearm 30. For example, thefront portion 50F of the receiver extension may incorporate a mechanical coupling, such as a threaded section similar to the threaded section at the front of thereceiver extension 16 shown inFIG. 2 . In alternate embodiments, the coupling of the receiver extension to the receiver section may have any other desirable interface. Thereceiver extension 50 may have astock support 50S, as shown inFIG. 4A . Thestock support 50S may provide a mount or attachment for the stock to the firearm receiver extension, and hence, facilitates mounting of the stock to the firearm. In this embodiment, the receiver extension may be a one-piece member of unitary construction with theintegral stock support 50S. In alternate embodiments, the receiver extension may be an assembly. In the embodiment shown, thestock support 50S may be an elongated rail extending longitudinally on a bottom or ventral portion of the receiver extension. In alternate embodiments, the stock support may have any other suitable shape and any suitable orientation. - As seen in
FIG. 4A , thereceiver extension 50 has anend plate 54 at therear portion 50R of the extension tube. Theend plate 54 substantially closes, but does not completely seal the rear of the extension receiver tube. Theend plate 54 defines part of the regulator orregulator valve 52 as will be described further below. Referring now also toFIGS. 7A-7C , there is respectively shown an end elevation, cross-sectional view, and partial bottom view of the rear portion of the receiver extension. Theend plate 54 of thereceiver extension 50 is seen best inFIGS. 7A-7B . In this embodiment, theend plate 54 may be integral to the unitary construction member forming thereceiver extension 50. In alternate embodiments, the end plate may be a separate member, such as a separate end cap, that may be a mechanically fastened or otherwise bonded to the receiver extension tube. As seen inFIGS. 7A-7B , in this embodiment, the end plate has a port oraperture 62 extending therethrough. Theport 62 in the end plate provides communication between the interior volume 50I in thereceiver extension 50, where for example the action spring and buffer assembly are housed similar tospring 18 andbuffer 20 inFIG. 2 , and the exterior of the extension receiver.Port 62 in combination with interior volume 50I provide a passage through which the interior of the receiver communicates with the exterior of the firearm. In the embodiment shown, there are fiveports 62 formed in theend plate 54. In alternate embodiments, any desired number of ports may be provided. Theports 62 may be formed by any suitable means, such as drilling throughplate 54. Theports 62 may be of any suitable shape or size to allow desired level of communication between interior volume 50I and the exterior, as will be seen below, without adversely affecting the structural function of the end plate. For example,ports 62 may have a bore of about 0.125 inch diameter, though as noted before the ports may have any other suitable size bore. In alternate embodiments, the ports may have any desired shape and may not be a constant diameter bore. As seen inFIGS. 7A-7B , theports 62 may be positioned in thelower portion 54L of the end plate. Theports 62 may be positioned proximate to the inner surface 501S of the extension tube as shown inFIG. 7B . In alternate embodiments, more or fewer ports may be provided in the lower portion of the end plate, and additional ports may be located in other areas around the periphery of the end plate. As seen inFIGS. 7A-7B , the end plate may be shaped/formed or machined to include an annular counter bore 56 from therearmost face 54R of the end plate. The counter bore 56 is sized so that theports 62 are located within the counter bore area. The counter bore 56 defines aperipheral rim 54P and a spindle orshaft 58. As seen inFIG. 7A , in this embodiment, therim 54P extends substantially continuously around the perimeter of the counter bore 56, and may be sufficiently high (and conversely the counter bore may be sufficiently deep) to provide sufficient overlap with the valve assembly 72 (seeFIG. 4A ) of theregulator 52, as will be described below, to prevent undesired entry of contamination into the receiver extension interior 50I.Spindle 58 may have abore 60 formed therein for a valve assembly mounting fastener (not shown). - The
end plate 54 of the receiver extension is provided with a spring loadeddetent 63 for positive engagement of theregulator valve assembly 72, in order to hold the valve assembly in a desired position (seeFIG. 7A ). In this embodiment, the spring loadeddetent 63 may be located within therim 54P of theend plate 54. As seen inFIG. 7B-7C , the spring loadeddetent 63 may be located inbore 64. In this embodiment, thebore 64 housing the spring loaded detent may be formed through thestock support 50S to penetrate the inside face of the counter borerim 54P. In alternate embodiments, the spring loaded detect may be provided in any other suitable location in the end plate or valve assembly. In this embodiment, bore 64 houses ball or pin 66, and a biasing spring (not shown) that biases the ball or pin 66 againstshoulders 64S ofbore 64. The detent ball/pin 66 is suitably shaped so that when biased againstshoulders 64S, the ball/pin tip projects sufficiently beyond the rim inside face to securely engage the valve assembly disposed in the counter bore 56. A fastener or closure post (not shown) may be positioned in thebore 64 to secure the ball/pin 66 and spring inside the bore, and prevent undesired matter from entering the bore. - Referring now again to
FIG. 4A ,regulator 52 includesvalve assembly 72. As may be realized fromFIG. 4A , thevalve assembly 72 is placed within the counter bore 56 of theend plate 54 to formregulator 52.Valve assembly 72 generally comprisesvalve 74,gasket 76 and a mounting fastener (not shown). As will be described,valve assembly 72 comprises a closure capable of being selectably moved between open and closed positions and between intermediate positions with the closed position closing the passage, at least in part. As will be described below,valve assembly 72 may operate as a variable firing cycle rate selector where the operator may select different firing rates as a function of the rotational position ofvalve 72.Valve 74 is shown inFIGS. 8A-8D . In this embodiment,valve 74 is shaped to conformally fit within the counter bore 56 in theend plate 64 of the receiver extension. Theouter periphery 74P of thevalve 74, or at least the front portion of theperiphery 74P received within therim 54P ofcounterbore 56, may have a diameter sized to form a close fit with the inside face of therim 54P. As seen best inFIGS. 8B and 8D , thevalve 74 has abore 74B sized to receive and form a running fit with the spindle 58 (seeFIG. 7B ) ofend plate 54. In the exemplary embodiment,valve 74 may be a one piece member of unitary construction. Thevalve 74 may be made of metal or plastic or any other suitable material. As seen inFIGS. 8A-8B and 8D, thevalve 74 may have a hollowed portion 74I. In this embodiment, the hollow 74I extends inwards from thefront face 74F of thevalve 74, and has a generally semi-circular shape. The hollow is sized so that, when mated to theend plate 54 with thevalve 74 positioned so that hollow 74I circumferentially overlaps, at least in part, one or more of theregulator ports 62, the radial width of the hollow is coextensive with the bore of theports 62. In other words, the inner and outer radial edges 741L, 741M of the hollow are respectively outside the bore of theports 62 in theend plate 54. The valve has ports 74A in the rear face communicating with the hollow 74I. The valve further may haveouter ports 740 in theouter rim 74P of the valve that also communicate with the hollow 74I. In this embodiment,rear ports 74H may be formed by bores extending from therear face 74R (as seen inFIG. 8D ) into the hollow. Sevenports 74H are shown inFIG. 8B for example purposes, and in alternate embodiments more or fewer ports may be used of any desired size. Therear ports 74H may have a bore of about 0.125 inch diameter, though as noted above any suitable bore may be used. In this embodiment, there are a corresponding number (i.e. seven) ofrim ports 740. Therim ports 740 are formed by suitable bores (e.g. about 0.125 diameter) extending radially inward from theouter rim 74P to the hollow 74I. As seen inFIG. 8C , theouter ports 740 are located on a resolution of the outer rim that is not located or overlapped by the rim lip 50P (seeFIG. 7B ) of the extension receiver when thevalve 74 is mated to theend rate 54. In this embodiment, the bores forouter ports 740 may intersect the bores of therear ports 74H. In alternate embodiments, the number, size and spacing of the outer ports may be altered as desired. In still other alternate embodiments, the valve may be provided with any desired combination of rear and outer ports including no rear ports, or no outer ports. As seen inFIG. 8D , the rear ports and outer ports respectively provide fluid flow paths, indicated by arrow RF, of respectively, for fluid in the hollow 74I subjected to positive head. The flow areas provided by therear ports 74H andouter ports 740 may be larger than the flow area defined by theports 62 in theend plate 54 of the extension receiver. - As seen in
FIGS. 8A-8D , the portion ofvalve 74 opposite the hollow 74I is generally solid, so that when this portion of thevalve 74 is positioned to cover theports 62 in the end plate, the regulator is closed and fluid communication from the inside 50I of the receiver extension tube throughports 62 is blocked. In this embodiment, thefront face 74F of thevalve 74 has ablind slot 74G formed therein as shown inFIG. 8B . Theblind slot 74G provides capture to gasket 76 (seeFIG. 4A ). Thegasket 76, and hence slot 76G in the rear face of the valve is sized, so that when thevalve 74 is positioned to the closed position, described below, the gasket covers allports 62 in theend plate 54 of the receiver extension.Gasket 76 may be made of any suitable resiliently compliant material such as rubber, neoprene or composite. In alternate embodiments, the gasket, and capture space in the valve may have any other suitable shape and be located in any other suitable position. As seen inFIGS. 8B-8C , theouter rim 74P of the valve hasengagement recesses 74E, 74EC for engagement of the spring loadeddetent 63 in the end plate 54 (seeFIG. 7C ). The recesses 74EC, 74E are located on the periphery of the valve to provide the selectable positions of theregulator 52. Recess 74EC is located opposite thegasket holding recess 74G, and its position in cooperation with the location of the spring loaded detent 63 (seeFIG. 7C ) defines the regulator closed position. The other recesses 74E are located opposite the hollowing 74I and define different flow conditions for theregulator 52. - The
regulator 52 is assembled by placingvalve 74, with holdinggasket 76 inslot 74G, into the counter bore 56 in theend plate 54 of thereceiver extension 50. Thevalve 74 is positioned with itsfront face 74F against the extension receiver end plate. Accordingly, the hollow 74I andgasket 76 are facing the end plate.Spindle 58 is received inbore 74B so that the valve may be rotated clockwise/counterclockwise about the spindle. When the fastener (not shown) fastens thevalve 74 to the end plate, thegasket 76 may be compressed against the inner surface of counter bore 56. As may be realized, theregulator 52 is controlled by rotating thevalve 74 to the various positions defined by the engagement recesses 74E, 74EC. Referring now again toFIG. 4A , and also toFIG. 5A , which show theregulator 52 in the fully open position, where all theports 62 in the receiver extension end plate are coincident or otherwise communicating without impediment with hollow 74I in thevalve 74. In this position the recess 74EO in the valve is engaged by the spring loadeddetent 63 stably holding the valve in the position relative to the receiver extension. The regulator fully open position is also shown inFIG. 6A . As seen inFIG. 6A , in this position theports 62 in the receiver extension are within the coverage of the hollow 74I in thevalve 74. As may be realized, as thevalve 74 is rotated about the spindle 58 (seeFIG. 7B ) from the fully open position shown inFIG. 6A , the hollow 74I is rotated away from theports 62, so that the ports become progressively misaligned with hollow 74I and blocked bygasket 76 in thevalve 74. Continued rotation ofvalve 74, such as to an orientation about 180° from the fully open position inFIG. 6A , results in thegasket 76, in this embodiment, covering and hence closing allports 62 in the receiver extension. In this position, illustrated inFIGS. 4B, 5B and 6B, theregulator 52 is closed. The engagement recess 74EC in the valve is engaged by the spring loadeddetent 63, when the valve is in this position, to stably hold the valve closed. As described before, thevalve 74 may be positioned in intermediate open positions as desired. - Thus, in the exemplary embodiment, the operator may readily control the
regulator 52 by rotatingvalve 74 as desired. In the event the operator wishes to operate the firearm substantially immediately upon removal from water immersion, the operator may rotatevalve 74 to fully open regulator 52 (position shown inFIG. 4A, 5A , 6A) as described before. This position provides for maximum fluid flow through the regulator. After theregulator 52 is opened, the operator may substantially immediately (for example within about two seconds or less from opening the regulator, or if the regulator is open prior to removal from immersion) commence to fire. The open regulator allows any water in the receiver extension to be discharged by the cycle action of the bolt carrier as well as standing water head. Any water may be discharged freely through the regulator with negligible effect on the cycle action of the bolt carrier. This is not possible with conventional firearms. Further, the operator may selectably adjust the cycle rate of the firearm with theregulator 52, when the firearm is operated in the automatic mode. As noted before, when fully open theregulator 52 allows the maximum fluid flow therethrough. As the regulator is progressively closed, by rotatingvalve 74 toward the fully closed position, the fluid flow rate throughregulator 52 is progressively reduced. The minimum fluid flow through theregulator 52 is achieved when in the closed position. Air resistance in the receiver extension to the buffer as it is being moved by the bolt carrier cycle, and to the action spring as it is being compressed by the buffer correspondingly increases as the regulator goes from open to closed positions, with a commensurate but inverse affect (an air pressure resistance increases, cyclic rate decreases) on the cyclic rate of the firearm. The cyclic variance that may be achieve by controlling theregulator 52 between its open position and closed position may be about 40-50 cycles/second in the M-4type firearm 30. - Referring now to
FIG. 9A , there is shown an end view of an alternate embodimentlower receiver extension 80 having end plate 82. In this embodiment, the end plate 82 may be integral to the unitary construction member forming thereceiver extension 80. In alternate embodiments, the end plate may be a separate member, such as a separate end cap, that may be a mechanically fastened or otherwise bonded to the receiver extension tube. End plate 82 has a port oraperture 84 extending therethrough providing fluid communication between the interior volume in thereceiver extension 80, where for example the action spring 18 (shown dotted) and buffer assembly are housed similar tospring 18 andbuffer 20 inFIG. 2 , and the exterior of the extension receiver. In the embodiment shown,ports 84 are machined inreceiver extension 80 radially closer to the center of receiver extension as compared to the embodiment shown inFIG. 7A . In doing so,spring 18 will not impede the flow of fluid throughports 84. In the embodiment shown, there are threeports 84 formed in the end plate 82; two of the ports being drilled diameters through with the central port being a machined kidney slot. In alternate embodiments, any desired number of ports may be provided in any number of shapes. For example, the ports may be a slot or combinations of any shape. As a further example, the ports may be cones or the diameters may have a radius on the entry and exit points to facilitate flow and minimize wear on the sealing surface of the regulator. Theports 84 may be formed by any suitable means, such as drilling throughplate 84. Theports 84 may be of any suitable shape or size to allow desired level of communication between interior volume and the exterior without adversely affecting the structural function of the end plate. In alternate embodiments, more or fewer ports may be provided in the lower portion of the end plate, and additional ports may be located in other areas around the periphery of the end plate. Other features ofreceiver extension 80 may be similar to that ofreceiver extension 50. - Referring now to
FIG. 9B , there is shown an isometric view of analternate embodiment regulator 90.Regulator 90 has a generally hollowedportion 92 and a generallysolid portion 94.Ports 106 are provided in hollowedportion 92. When hollowedportion 92 is positioned to cover theports 84 in the end plate, the regulator is opened and fluid communication from the inside of the receiver extension tube throughports 84 is not blocked. Whensolid portion 94 is positioned to cover theports 84 in the end plate, the regulator is closed and fluid communication from the inside of the receiver extension tube throughports 84 is blocked. Whenvalve 90 is rotated at intermediate positions between the two aforementioned extremes, the flow throughports 84 is variably regulated from the two extremes. In this embodiment, thefront face 94A of thevalve 90 has a kidney shaped o-ring groove 96 formed therein.Groove 96 provides a seat for o-ring 98. The o-ring 98 and the correspondinggroove 96 is sized, so that when thevalve 90 is positioned to the closed position, the o-ring enclosed area covers allports 84 in the end plate 82 of thereceiver extension 80. o-ring 98 may be made of any suitable resiliently compliant material such as rubber, neoprene, viton or other suitable material or composite. In alternate embodiments, the o-ring, gasket, and capture space in the valve may have any other suitable shape and be located in any other suitable position or have multiple seals or sealing surfaces. Theouter rim 100 of thevalve 90 has engagement recesses 102A-102P for engagement of the spring loaded detent in the end plate 82. The recesses are located on the periphery of the valve to provide the selectable positions of theregulator 52. The recesses may have different depths, for example, to allow the user to know when in the full open or full closed position. Recesses may be provided at suitable locations, for example, to define different flow conditions for theregulator 90. In alternate embodiments, more or less recesses may be provided in alternate locations. In alternate embodiments, stops may be provided, for example to let the user know that the valve is at extremes of motion. Aknurled surface 104 may be provided to allow the operator to rotatevalve 90 without slippage. - It should be understood that the foregoing description is only illustrative of the exemplary embodiments. Various alternatives and modifications can be devised by those skilled in the art without departing from the exemplary embodiments. Accordingly, the exemplary embodiments are intended to embrace all such alternatives, modifications and variances which fall within the scope of the appended claims.
Claims (22)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002597441A CA2597441A1 (en) | 2005-01-25 | 2006-01-25 | Firearm with rear regulator |
US11/339,187 US20060254414A1 (en) | 2005-01-25 | 2006-01-25 | Firearm with rear regulator |
BRPI0607610-6A BRPI0607610A2 (en) | 2005-01-25 | 2006-01-25 | M-4 type firearm and automatic firearm |
US14/330,386 US9482485B2 (en) | 2005-09-19 | 2014-07-14 | Firearm having a removable hand guard |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US64687505P | 2005-01-25 | 2005-01-25 | |
US11/339,187 US20060254414A1 (en) | 2005-01-25 | 2006-01-25 | Firearm with rear regulator |
Publications (1)
Publication Number | Publication Date |
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US20060254414A1 true US20060254414A1 (en) | 2006-11-16 |
Family
ID=38564104
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/339,187 Abandoned US20060254414A1 (en) | 2005-01-25 | 2006-01-25 | Firearm with rear regulator |
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US (1) | US20060254414A1 (en) |
EP (1) | EP1877312A2 (en) |
WO (1) | WO2007114801A2 (en) |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100269682A1 (en) * | 2009-03-24 | 2010-10-28 | Sturm, Ruger & Company, Inc. | Bolt carrier for gas operated rifle |
US8161864B1 (en) | 2009-03-24 | 2012-04-24 | Sturm, Ruger & Company, Inc. | Firearm gas piston operating system |
US8341868B2 (en) | 2010-06-30 | 2013-01-01 | Nisim Zusman | Stock for a small arms weapon |
USD697162S1 (en) | 2012-08-05 | 2014-01-07 | Sagi Faifer | Gun stock |
WO2014108881A1 (en) * | 2013-01-14 | 2014-07-17 | Kriss Systems Sa | Bolt guidance system |
US8978284B1 (en) | 2013-12-30 | 2015-03-17 | Nisim Zusman | Stock and vibration isolator for a small arms weapon |
USD738981S1 (en) | 2013-12-30 | 2015-09-15 | Nisim Zusman | Gun stock |
USD745622S1 (en) | 2014-05-15 | 2015-12-15 | Nisim Zusman | Gun stock |
US9228799B2 (en) | 2006-10-06 | 2016-01-05 | Colt's Manufacturing Company Llc | Firearm having a removable hand guard |
USD747427S1 (en) | 2014-07-15 | 2016-01-12 | Nisim Zusman | Gun stock with accessory rail |
USD748216S1 (en) | 2014-07-15 | 2016-01-26 | Nisim Zusman | Gun stock |
US20160273873A1 (en) * | 2015-03-19 | 2016-09-22 | Kyntec Corporation | Recoil Shock Absorber for Long Barrel Firearms |
US9459060B2 (en) | 2009-10-05 | 2016-10-04 | Colt's Manufacturing Ip Holding Company Llc | Modular firearm |
US9581411B2 (en) | 2014-04-01 | 2017-02-28 | Nisim Zusman | Stock and detachable accessory housing for a small arms weapon |
US20170299295A1 (en) * | 2015-10-09 | 2017-10-19 | Casimir Pawlowski | Firearm and firearm buffer assembly |
US9823031B2 (en) | 2009-10-05 | 2017-11-21 | Colt's Manufacturing Ip Holding Company Llc | Modular automatic or semi-automatic rifle |
IT201700112064A1 (en) * | 2017-10-05 | 2019-04-05 | Renzo Armellin | Pneumatic device with movable shutter piston in large-caliber firearms with loose closure |
USD847933S1 (en) | 2017-06-09 | 2019-05-07 | Maxim Defense Industries, LLC | Stock for a gun |
USD865898S1 (en) | 2017-09-06 | 2019-11-05 | Maxim Defense Industries, LLC | Stock for a gun |
USD883419S1 (en) | 2017-09-06 | 2020-05-05 | Maxim Defense Industries, LLC | Stock for a gun |
USD907157S1 (en) | 2019-07-16 | 2021-01-05 | Sagi Faifer | Stock for a gun |
USD953470S1 (en) | 2019-01-10 | 2022-05-31 | Maxim Defense Industries, LLC | Upper assembly, handguard, lower receiver, and stock for a gun |
US11624583B2 (en) | 2019-07-16 | 2023-04-11 | Sagi Faifer | Variably adjustable stock for a gun and apparatus and method for adjustment of same |
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DE102021107691A1 (en) | 2021-03-26 | 2022-09-29 | C. G. Haenel GmbH | Recoil buffer assembly for a handgun |
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US5272956A (en) * | 1992-06-11 | 1993-12-28 | Hudson Lee C | Recoil gas system for rifle |
US5909002A (en) * | 1997-10-09 | 1999-06-01 | Atchisson; Maxwell G. | Buffer for firearm |
US6829974B1 (en) * | 2003-12-12 | 2004-12-14 | Mack W. Gwinn, Jr. | Firearm buffer system |
US6848351B1 (en) * | 2002-05-07 | 2005-02-01 | Robert B. Davies | Rifle |
US7131367B1 (en) * | 2005-04-26 | 2006-11-07 | Enidine, Inc. | Hydraulic bolt buffer for firearm |
-
2006
- 2006-01-25 WO PCT/US2006/002517 patent/WO2007114801A2/en active Search and Examination
- 2006-01-25 US US11/339,187 patent/US20060254414A1/en not_active Abandoned
- 2006-01-25 EP EP06849671A patent/EP1877312A2/en not_active Withdrawn
Patent Citations (5)
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US5272956A (en) * | 1992-06-11 | 1993-12-28 | Hudson Lee C | Recoil gas system for rifle |
US5909002A (en) * | 1997-10-09 | 1999-06-01 | Atchisson; Maxwell G. | Buffer for firearm |
US6848351B1 (en) * | 2002-05-07 | 2005-02-01 | Robert B. Davies | Rifle |
US6829974B1 (en) * | 2003-12-12 | 2004-12-14 | Mack W. Gwinn, Jr. | Firearm buffer system |
US7131367B1 (en) * | 2005-04-26 | 2006-11-07 | Enidine, Inc. | Hydraulic bolt buffer for firearm |
Cited By (30)
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---|---|---|---|---|
US9228799B2 (en) | 2006-10-06 | 2016-01-05 | Colt's Manufacturing Company Llc | Firearm having a removable hand guard |
US8161864B1 (en) | 2009-03-24 | 2012-04-24 | Sturm, Ruger & Company, Inc. | Firearm gas piston operating system |
US8307750B2 (en) | 2009-03-24 | 2012-11-13 | Sturm, Ruger & Company, Inc | Gas operated rifle with bolt carrier and receiver assembly |
US20100269682A1 (en) * | 2009-03-24 | 2010-10-28 | Sturm, Ruger & Company, Inc. | Bolt carrier for gas operated rifle |
US9459060B2 (en) | 2009-10-05 | 2016-10-04 | Colt's Manufacturing Ip Holding Company Llc | Modular firearm |
US10101101B2 (en) | 2009-10-05 | 2018-10-16 | Colt's Manufacturing Ip Holding Company Llc | Modular firearm |
US9823031B2 (en) | 2009-10-05 | 2017-11-21 | Colt's Manufacturing Ip Holding Company Llc | Modular automatic or semi-automatic rifle |
US8341868B2 (en) | 2010-06-30 | 2013-01-01 | Nisim Zusman | Stock for a small arms weapon |
US8782941B2 (en) | 2010-06-30 | 2014-07-22 | Nisim Zusman | Stock for a small arms weapon |
USD697162S1 (en) | 2012-08-05 | 2014-01-07 | Sagi Faifer | Gun stock |
WO2014108881A1 (en) * | 2013-01-14 | 2014-07-17 | Kriss Systems Sa | Bolt guidance system |
US9612066B2 (en) | 2013-01-14 | 2017-04-04 | Kriss Systems Sa | Bolt guidance system |
US8978284B1 (en) | 2013-12-30 | 2015-03-17 | Nisim Zusman | Stock and vibration isolator for a small arms weapon |
USD738981S1 (en) | 2013-12-30 | 2015-09-15 | Nisim Zusman | Gun stock |
US9581411B2 (en) | 2014-04-01 | 2017-02-28 | Nisim Zusman | Stock and detachable accessory housing for a small arms weapon |
USD745622S1 (en) | 2014-05-15 | 2015-12-15 | Nisim Zusman | Gun stock |
USD748216S1 (en) | 2014-07-15 | 2016-01-26 | Nisim Zusman | Gun stock |
USD747427S1 (en) | 2014-07-15 | 2016-01-12 | Nisim Zusman | Gun stock with accessory rail |
US20160273873A1 (en) * | 2015-03-19 | 2016-09-22 | Kyntec Corporation | Recoil Shock Absorber for Long Barrel Firearms |
US9752848B2 (en) * | 2015-03-19 | 2017-09-05 | Kyntec Corporation | Recoil shock absorber for long barrel firearms |
US9810508B2 (en) | 2015-03-19 | 2017-11-07 | Kyntec Corporation | Recoil shock absorber for long barrel firearms |
US10054378B2 (en) * | 2015-10-09 | 2018-08-21 | TCC Solutions | Firearm and firearm buffer assembly |
US20170299295A1 (en) * | 2015-10-09 | 2017-10-19 | Casimir Pawlowski | Firearm and firearm buffer assembly |
USD847933S1 (en) | 2017-06-09 | 2019-05-07 | Maxim Defense Industries, LLC | Stock for a gun |
USD865898S1 (en) | 2017-09-06 | 2019-11-05 | Maxim Defense Industries, LLC | Stock for a gun |
USD883419S1 (en) | 2017-09-06 | 2020-05-05 | Maxim Defense Industries, LLC | Stock for a gun |
IT201700112064A1 (en) * | 2017-10-05 | 2019-04-05 | Renzo Armellin | Pneumatic device with movable shutter piston in large-caliber firearms with loose closure |
USD953470S1 (en) | 2019-01-10 | 2022-05-31 | Maxim Defense Industries, LLC | Upper assembly, handguard, lower receiver, and stock for a gun |
USD907157S1 (en) | 2019-07-16 | 2021-01-05 | Sagi Faifer | Stock for a gun |
US11624583B2 (en) | 2019-07-16 | 2023-04-11 | Sagi Faifer | Variably adjustable stock for a gun and apparatus and method for adjustment of same |
Also Published As
Publication number | Publication date |
---|---|
WO2007114801A2 (en) | 2007-10-11 |
EP1877312A2 (en) | 2008-01-16 |
WO2007114801A3 (en) | 2008-05-15 |
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