|Publication number||USRE40216 E1|
|Application number||US 10/811,795|
|Publication date||Apr 8, 2008|
|Filing date||Mar 29, 2004|
|Priority date||Mar 9, 2001|
|Also published as||US6490822|
|Publication number||10811795, 811795, US RE40216 E1, US RE40216E1, US-E1-RE40216, USRE40216 E1, USRE40216E1|
|Inventors||Richard E. Swan|
|Original Assignee||Swan Richard E|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (22), Referenced by (67), Classifications (12), Legal Events (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This application claims the benefit of Provisional Application No. 60/274,147, filed Mar. 9, 2001.
This invention relates to integration means, and more particularly to a device added to a firearm for incorporating ancillary equipment.
As the field of combat and commercial weaponry expands, numerous add-on enhancements have become available for attachment to standard firearms thereby significantly upgrading the capability of the firearm. Various methods and means have been developed for interfacing the various add-on enhancements to firearms. Applicant's U.S. Pat. No. 4,845,871, discloses a quickly detachable interface means for modular enhancements. Applicant's U.S. Pat. No. 5,142,806 discloses a universal receiver sleeve having an upper interface portion with standard, universal dimensions regardless of the firearm and having a lower interface portion specific to a particular firearm. Applicant's U.S. Pat. No. 5,343,650 discloses an extended rigid interface frame with upper and lower rails joined to a firearm receiver and extending forward about the firearm's barrel to a head assembly replacing the firearm's normal front sight. A weaver type interface return portion is provided below the barrel from the head assembly to the receiver. A yoke braces the extended rigid frame receiver sleeve of the present invention to the forward portion of the firearm's receiver. The distal end of the extended rigid frame receiver sleeve terminates in a front sight housing which connects the upper and lower rails and provides a housing for advanced laser and sensor components, and the standard front sight bead. The front sight housing is self-supported by the connection of the upper and lower rails running back to the yoke and secured to the top of the receiver. The barrel of the rifle is free floating in that it does not touch the extended rigid frame receiver sleeve in any manner. This permits greater shooting accuracy and protects sensitive electrical components within the front sight housing by isolating the front sight housing from the heat generated from the barrel. Protective spring-loaded handguards are incorporated into the extended rigid frame receiver sleeve, thereby protecting a user's hands from a hot barrel, eliminating any pressure on the barrel, and providing quick access to the barrel area.
Although the principles of the above identified patented devices are generally applicable to all firearms, the specific firearm example identified in each patent was the U.S. military M16 rifle and carbine. The M16 has been in service for a number of years and will continue to be a popular rifle both in the U.S. military and foreign military for the foreseeable future. However, with the increasing development and refinement of laser technology, it has become highly desirable to integrate laser technology capabilities onto and into firearms.
The problem with integrating laser technology to firearms is the inherent conflict between a gun barrel's physical functioning and the rigid environment required for laser operations. For maximum results, a gun barrel should be physically isolated, i.e., “floating”. It is preferred that nothing be attached to the gun barrel, thereby isolating the barrel physically and eliminating bending and “droop” along the barrel's longitudinal axis. The ideal arrangement for lasers and ancillary optics and electronics is one of complete isolation from the gun barrel. The temperature of a gun barrel in use can rise to 900° F. This type of heat, as well as the physical shock on the gun barrel from firing, will quickly destroy lasers and ancillary optics and electronics.
The heat generated by the gun barrel transfers directly to any devices touching it thereby directly transferring enough heat to burn hands and destroy attached electrical devices. Further compounding this problem is the requirement that gun barrels be extra heavy to support the added weight attached by means of the collars. This in turn means more cantilevered stress on the barrel where it is joined with the M-16's aluminum receiver. The combination of heat and barrel weight tend to pull the barrel chamber out of alignment with the bolt lead, thereby causing bolt lug and extractor failure.
In view of the foregoing disadvantages inherent in the known types of devices now present in the prior art, the present invention provides a modular receiver sleeving system. As such, the general purpose of the present invention, which will be described subsequently in greater detail, is to provide a new and improved interface means for firearms which will isolate the gun barrel while providing various capabilities for mounting and integrating optics, lasers and sensors. Included in the invention capabilities are integral fastening fixtures and special contouring to facilitate internal fastening of laser housings adapted to plug into electrical sockets contained in the invention. This reduces size and eliminates exposed cables.
To attain this, the present invention extends the Swan universal receiver sleeve forward above the firearm barrel to a position just short of the firearm front sight. A weaver type interface return portion may be provided on the underside of the sleeve, or left solid over the barrel in front of the receiver to accommodate solid handguards or modular, dovetailed handguards. The underside of the rear portion of the sleeve is fixedly attached to the receiver top. The underside of the forward portion of the sleeve has an upper handguard piece attached thereto. A bottom handguard piece is fitted about the bottom of the gun barrel and is attached to the upper handguard piece via a unique channel and track system. The handguard pieces are not physically connected in any way to the gun barrel. The sleeve is self supported by the connection of the rear portion underside to the receiver top. Laser, electronics and optics modules may optionally be attached to the sleeve top side or to the upper handguard piece via special male and female dovetail track devices. The barrel of the rifle is essentially free floating. This permits greater shooting accuracy and protects sensitive electrical components integrated into and onto the firearm via the invention. Lighter weight barrels can be utilized as they are no longer deflected by outside pressure and direct transfer of heat to the hand is also eliminated.
Specifically, the present invention is a modular sleeve for interfacing modular enhancements to a firearm, said firearm having minimally a receiver with a stock and barrel attached thereto, said barrel defining the forward portion of the firearm and said stock defining the rearward portion of the firearm, said firearm longitudinal axis being defined as horizontal and running from said stock through said receiver to said barrel, said receiver having a forward portion, a top and a rearward portion, said barrel being joined to the forward portion of the receiver, said stock being joined to the rearward portion of the receiver. The modular sleeve is made up of a universal receiver sleeve having a top side, an underside and two opposite sides connecting said top side with said underside, said universal receiver sleeve being further defined as having a forward portion and a rear portion, the underside of the rear portion of the universal receiver sleeve being fixedly attached to the firearm receiver top, said receiver sleeve forward portion extended forward above the firearm barrel. The modular sleeve has an upper handguard piece with a front, rear, top, open bottom, opposing sides, outer side surfaces and inner side surfaces, said top, sides and bottom defining a hollow interior, said front and rear defining an upper handguard piece longitudinal axis, said upper handguard piece top being joined to the underside of the forward portion of the receiver sleeve. The modular sleeve also has a bottom handguard piece having a front, rear, open top, bottom, opposing sides, outer side surfaces and inner side surfaces, said bottom, sides and top defining a hollow interior, said front and rear defining a bottom handguard piece longitudinal axis, said bottom handguard piece being removably attached to the upper handguard piece. The upper handguard piece and attached bottom handguard piece surround the firearm barrel without touching said barrel.
The present invention provides a foundation for integrated laser fire control devices, sensors, communications, and a vast array of quickly attached ancillary devices, such as standard night vision, thermal, shot guns, grenade launchers, and other special systems.
The extra heavy barrels required on conventional rifles and carbines are no longer required with the present invention. A standard heavy or light weight barrel can be utilized because the present invention isolates and prevents hand, sling, and bipod pressure from deflecting the barrel. With the present invention, barrel handguards are not attached to the hot barrels, and provide a much cooler grip for the shooter. Weight reductions of at least one-half pound can be accomplished by use of a light weight barrel and the elimination of conventional solid aluminum and/or plastic handguards and their barrel hardware.
The modular sleeve is attached to the firearm upper receiver in a manner that provides a solid system, attachable or removable by a qualified armorer or a trained soldier. Greater accuracy is accomplished because the firearm has a free floating barrel with the instant invention and thereby no outside forces deflecting point of aim.
Although the invention accepts conventional laser attachments, the invention's unique integral laser housings replace the bulkiness of conventional laser housings.
These together with other objects of the invention, along with various features of novelty which characterize the invention, are pointed out with particularity in the claims annexed hereto and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and the specific objects attained by its uses, reference should be had to the accompanying drawings and descriptive matter in which there is illustrated a preferred embodiment of the invention.
Referring to the drawings in detail wherein like elements are indicated by like numerals, there is shown in
The present invention provides a modular sleeve 1 about the firearm barrel 16 replacing the firearm's conventional handguards with a handguard assembly integrated into the modular sleeve 1. The present invention is anchored by the universal receiver sleeve 2 disclosed in applicant's U.S. Pat. No. 5,142,806, issued on Sep. 1, 1992, “Universal Receiver Sleeve”, to Richard E. Swan, and incorporated herein by reference.
Referring more particularly to
The receiver sleeve top section 20 is joined to the receiver sleeve bottom section 40. The receiver sleeve bottom section also has a longitudinal, horizontally positioned base portion 41 along its length. The base portion 41 has two long side edges 49. A first rail 42 extends downward from the base portion 41 adjacent one of the long side edges 49 and a second rail 43 extends downward from the base portion 41 adjacent the other of the long side edges 49. The second rail 43 is in spaced parallel relationship to the first rail 42. The top section base 21 is joined in a mirrored, face to face relationship to the bottom section base 41. The lower surface 44 of the first rail 42 lies on the same horizontal plane as the lower surface 45 of the second rail 43. Each of the two long side edges 49 of the base portion 41 and the rails 42, 43 are integral with an angled engagement surface 50 which extends the full length of the bottom section 40. A longitudinal resultant channel 48 is formed between the integrated rail-angled engagement surfaces 42, 50 and 43, 50. The cross section shape of the channel 48 will vary from firearm to firearm depending on the upper receiver top 13 contour of the particular firearm. The channel 48 is the interface and engagement means between the receiver sleeve 2 and the firearm 10 or the sleeve 2 and other firearm ancillary elements. The nominal cross section of the channel 48 and the cross section of the receiver sleeve top section 20 are identical. This permits complex integration of various modules to a firearm 10. In this embodiment of the invention the channel cross section provides a weaver type interface return.
The present invention provides for extension of the receiver sleeve 2 forward above the firearm barrel 16 to a position just short of the firearm front sight 19. This is the sleeve front portion 3 described above. The receiver sleeve bottom section 40 may be a weaver type interface or left solid over the barrel 16 in the receiver front portion 3 to accommodate solid handguards or modular, dovetailed handguards. The bottom section 40 of the rear portion 4 of the sleeve 2 has a weaver type interface and is fixedly attached to the receiver top 13. In the present invention the bottom section 40 of the front portion 3 of the sleeve 2 has an upper handguard piece 50 attached thereto. A bottom handguard piece 70 is fitted about the bottom of the gun barrel 16 and is attached to the upper handguard piece 50. The handguard pieces 50, 70 are not physically connected in any way to the gun barrel 16. The sleeve 2 is self supported by the joining of the sleeve rear portion 4 bottom section 40 to the receiver top 13. In another embodiment of the invention shown in
As may also be seen in
Referring more particularly to
The bottom handguard piece 70 has a front 71, rear 72, open top 73, bottom 74, opposing sides 75, outer side surfaces 76 and inner side surfaces 77, said bottom top 74 and sides 75 defining an interior 78. The front 71 and rear 72 define the bottom handguard piece's longitudinal axis. The bottom 74 may be formed into a male weaver type interface. Each of the bottom handguard side outer surfaces 76 have two longitudinal channels formed therein, i.e., a small and shallow upper channel 80 and a larger, shallow bottom channel 81. The channels 80, 81 provide hand gripping means for a user.
The upper handguard rear 52 and bottom handguard piece rear 72 may be shaped to accommodate various firearm barrel-receiver connection means.
The bottom hand guard inner side surfaces 77 each have a longitudinal T-shaped protrusion 82 position near to the top 73, each protrusion being a mirror of the other. The bottom handguard piece 70 is adapted to being joined to the upper handguard piece 50 by sliding the bottom handguard longitudinal T-shaped protrusion 82 into the upper handguard bottom interface channel 61.
Referring more particularly to
Referring particularly to
Referring more particularly to
Referring more particularly to
The receiver top 13 has a plurality of notches 8 formed thereon, each said notch 8 having a rectangular cross section and are formed transverse to the longitudinal axis of the firearm 10. The universal receiver sleeve 2 has an elongated rectangular opening 150 formed in a first universal receiver sleeve opposite side 5, said rectangular opening 150 extending from the universal received sleeve opposite side lower surface 45 a predetermined distance toward the universal receiver top side 25 terminating in a rectangular opening upper edge 151, said rectangular opening upper edge having a plurality of rectangular notches 141 formed therein. The second universal receiver sleeve opposite side 5′ has a plurality of apertures 152 formed therein, each said aperture 152 being formed directly opposite a first universal received sleeve opposite side rectangular notch 141.
A sleeve dovetail interface element 140 is provided for engagement with the universal receiver sleeve rear portion 4. The sleeve dovetail interface element 140 has an exterior horizontal surface 142 with a unique cross-sectional dovetail shape adapted to attach ancillary equipment, and an opposite interior surface 143 with a standard dovetail configuration for securing the universal receiver sleeve rear portion 4 to the receiver top 13. There are a plurality of projecting elements 144 formed on the sleeve dovetail interface element interior surface 143, each said projecting element 144 having a rectangular cross-section, said projecting elements 144 adapted to engage the notches 8 across the receiver top 13. The sleeve dovetail interface element interior surface 143 is adapted to engage said universal receiver sleeve opposite side elongated opening 150 and a side 153 of said receiver top 13. The sleeve dovetail interface element interior surface projecting elements 144 are adapted to engage the elongated rectangular opening rectangular notches 141, the receiver top notches 8 and the apertures 152 in said second received sleeve opposite side 5′. Special nuts 145, each adapted to engage a portion of a sleeve dovetail interface element interior surface projecting element projecting through each aperture 152 are also provided. The sleeve dovetail interface element 140 permits devices to be secured to the side of a weapon, adjacent to the upper receiver without interfering with the functions or handling of the weapon.
It is understood that the above-described embodiment is merely illustrative of the application. Other embodiments may be readily devised by those skilled in the art which will embody the principles of the invention and fall within the spirit and scope thereof.
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|U.S. Classification||42/71.01, 42/124, 42/75.01|
|International Classification||F41G1/387, F41C23/00, F41C23/16|
|Cooperative Classification||F41C23/00, F41C23/16, F41G11/003|
|European Classification||F41C23/00, F41G11/00B4, F41C23/16|
|Jul 8, 2008||RR||Request for reexamination filed|
Effective date: 20080521
|Apr 19, 2010||FPAY||Fee payment|
Year of fee payment: 8
|Nov 30, 2010||B1||Reexamination certificate first reexamination|
Free format text: THE PATENTABILITY OF CLAIMS 1 AND 19-40 IS CONFIRMED. CLAIMS 41 AND 44 ARE DETERMINED TO BE PATENTABLE AS AMENDED. CLAIMS 42, 43 AND 45-54, DEPENDENT ON AN AMENDED CLAIM, ARE DETERMINED TO BE PATENTABLE. CLAIMS 2-18 WERE NOT REEXAMINED.
|May 28, 2014||FPAY||Fee payment|
Year of fee payment: 12
|Feb 24, 2015||CC||Certificate of correction|