Firearm accessory mounting interface, mirage shield and ergonomic method for configuring rifle components and accessories
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F41C-023/16
F41A-021/44
출원번호
US-0224646
(2016-07-31)
등록번호
US-10184752
(2019-01-22)
발명자
/ 주소
Tubb, G. David
출원인 / 주소
Tubb, G. David
대리인 / 주소
McKinney, Jr., J. Andrew
인용정보
피인용 횟수 :
0인용 특허 :
17
초록▼
An improved firearm accessory mounting interface 200 with a durable integral mirage shield 200 that adds minimal or no weight to a weapon system, is unlikely to snag and is comfortable to hold includes a tubular handguard's cylindrical sidewall which is preferably defined with four radially spaced q
An improved firearm accessory mounting interface 200 with a durable integral mirage shield 200 that adds minimal or no weight to a weapon system, is unlikely to snag and is comfortable to hold includes a tubular handguard's cylindrical sidewall which is preferably defined with four radially spaced quadrants each having, preferably, first and second spaced arrays of parallel, elongated grooves 232, 234 separated by an external surface with at least two spaced apart transverse notches 250 which are configured to define a firearm accessory mount rail segment 260 and ergonomically comfortable grasping surface that directs hot air away from the handguard's interior and provides a plurality of mounts compatible with accessory clamps configured to engage and hold a Picatinny rail.
대표청구항▼
1. A firearm accessory mounting interface, comprising: a tubular handguard having a cylindrical outer sidewall with an external sidewall surface defined around a central axis, said external sidewall surface defining an external convex curvature having first and second spaced parallel arrays of longi
1. A firearm accessory mounting interface, comprising: a tubular handguard having a cylindrical outer sidewall with an external sidewall surface defined around a central axis, said external sidewall surface defining an external convex curvature having first and second spaced parallel arrays of longitudinal elongated grooves, slots or defined therethrough to provide fluid communication between an interior lumen within said cylindrical sidewall and ambient air;said external sidewall surface including an impermeable first quadrant surface between said first and second spaced arrays of longitudinal elongated slots; andsaid first quadrant surface including a plurality of spaced transverse notches which are defined transversely across, but not through said first quadrant surface;wherein said first quadrant surface and transverse notches define a mount which provides edges and grasping surfaces sunken within the outside diameter of said external sidewall's substantially circular cross section, wherein said mount and said transverse notches are dimensioned to engage and support rail-mountable accessories. 2. The accessory mounting interface of claim 1, wherein said cylindrical sidewall's convex curvature is defined between the first and second elongated slots in an inter-slot width wherein said inter-slot width is coextensive with said first quadrant external sidewall surface to provide an integral mount thereon. 3. The accessory mounting interface of claim 2, wherein said longitudinal slots are configured to aim flowing barrel-heated air from the interior of the handguard lumen laterally and away from a top quadrant, thereby reducing the potential for optical distortion in a target image seen by the shooter and providing an integral and durable mirage shield structure which mitigates optical distortion as the barrel heats up. 4. The accessory mounting interface of claim 2, wherein said longitudinal slots are spaced apart with a spacing of approximately 21.2 mm and said plurality of spaced transverse notches are approximately 21.2 mm long to define a firearm accessory mount rail segment so that rail-mountable accessories may be attached thereto in a manner compatible with accessories configured to engage and hold a Picatinny rail. 5. The accessory mounting interface of claim 2, wherein said longitudinal slots define opposing side surfaces of said inter-slot width in which are defined said plurality of spaced transverse notches which are each approximately 21.2 mm or 0.835 inches long to define a snag-free sunken firearm accessory mount rail segment, so that rail-mountable accessories may be removably clamped and attached thereto. 6. An Ergonomic Method for configuring rifle components and accessories, comprising: (a) providing a tubular handguard having a cylindrical sidewall which is defined with an external surface having an outside diameter and, first and second spaced arrays of parallel, elongated slots: said sidewall surface between said slots having a plurality of spaced transverse notches, wherein said sidewall surface between said slots is configured within said outside diameter to define a sunken rail segment and ergonomically comfortable grasping surfaces that are configured to receive accessory clamps configured to engage and hold a Picatinny rail;(b) providing, on said handguard's sidewall surface between said slots a convex curvature defined between the first and second elongated slots non perforating grooves in-an inter-groove width; and(c) providing a firearm accessory such as a bipod with a releasable mount configured to engage and hold a Picatinny rail with one, two or three transverse pins dimensioned to engage one, two or three Picatinny rail transverse grooves. 7. The Ergonomic Method for configuring rifle components and accessories of claim 6, further comprising: configuring said elongated perforating slots or ducts to aim flowing barrel-heated air from the interior of the handguard lumen laterally and away from a top quadrant, thereby reducing the potential for optical distortion in the target image seen by the shooter and providing an integral and durable, fuss-free mirage shield structure which mitigates such optical distortion for the precision shooter as the barrel heats up. 8. A rifle forend assembly configured for attachment to a rifle's receiver, comprising: a forend with an external wall surface having an external wall surface outside diameter and providing an enhanced accessory mount interface with a plurality of sunken snag-free ergonomic rail mounts defined within outer contours of the external wall surface;wherein each sunken rail-mount has at least first and second transversely aligned, parallel rounded notches, each shaped as a trough or radiussed groove having a substantially linear groove bottom which is bounded by angled wall segments, and the angle between the horizontal groove bottom surface and the angled wall segments at opposing ends is 45 degrees;wherein each sunken rail mount thus defines an integral sunken rail segment having spaced notches terminating in angled wall segments which terminate laterally at opposing ends to define a rail segment width of 0.835 inches, andwherein the lateral ends of each rail segment notch 250 are configured as outside corner surfaces or laterally opposed wedge-shaped surfaces which each define an outside corner like rebated wall segment which intersects the outwardly facing angled wall segment at 90 degrees. 9. The rifle forend assembly of claim 8, wherein said sunken rail segment opposing outside corner defining clamping surfaces are within or inside of the outer circumferential surface of the forend's outer surface. 10. The rifle forend assembly of claim 9, wherein said forend's outer surface has an outside diameter of approximately two inches and is knurled or textured, to provide a comfortable but secure gripping surface. 11. The rifle forend assembly of claim 9, wherein said mounting interface notches are defined in said sidewall outer surface which is tubular, and wherein said notches are defined between and bounded by first and second spaced elongated grooves in the inter-groove width, and the transverse notches extend substantially from the first elongated groove to the second elongated groove and so extend substantially all the way across the inter-groove width. 12. The rifle forend assembly of claim 11, wherein the linear transverse distance between the spaced elongated grooves is 21.2 mm or 0.835 inches, so accessories which are compatible with the Picatinny rail platform (MIL-STD-1913 or STANAG 2324) will easily engage and hold onto the forend assembly's sidewall's surface, where the transverse notch 250 and the sidewall's elongate groove edges define the first and second elongated non-perforating grooves, all of which cooperate to provide an enhanced, snag-free mounting interface. 13. The rifle forend assembly of claim 9, wherein said mounting interface is configured as a forend assembly adapted for use with a rifle and is adapted for attachment to releasable Picatinny-style mounts at multiple attachment locations along four quadrants while also allowing indexing of the forend assembly at multiple angular locations relative to the rifle. 14. The rifle forend assembly of claim 9, wherein each of the transverse mounting notches has a cross sectional shape which is rounded or radiussed, and said mount provides a snag free surface which is configured to receive an accessory with a clamp to engage a MIL-STD-1913 Picatinny Rail mount, clamping inwardly against and compressing while engaging the opposing notch edge surfaces. 15. The rifle forend assembly of claim 11, wherein said first and second spaced elongated grooves defined in said sidewall's outer surface comprise first and second slots which provide fluid communication between an interior lumen and ambient air. 16. The rifle forend assembly of claim 15, wherein said first and second slots are configured to aim barrel-heated air from the interior lumen laterally and away from a top surface of the forend sidewall, thereby reducing the potential for optical distortion in a target image seen by the shooter and providing an integral and durable mirage shield which mitigates optical distortion. 17. The rifle forend assembly of claim 8, further including a coaxially aligned proximal threaded collar segment which comprises forend tube nut and forend tube extension; wherein said forend tube nut has a knurled external sidewall and internal threads which are configured to engage and hold distal-end external threads of a rifle receiver;wherein forend tube nut has a cylindrical sidewall having an open proximal lumen with proximal end which defines an annular proximal end wall which is configured to be tightened proximally, where it may be limited in proximal engagement by a corresponding annular abutment surface defined in the rifle receiver when the forend tube nut is affixed thereupon. 18. The rifle forend assembly of claim 17, wherein said forend tube nut also has in its internal lumen an inwardly projecting annular flange at a distal end; wherein the inwardly projecting tube nut flange is dimensioned to engage and draw tight against a corresponding proximal flange in the tube extension when the tube nut is threadably engaged upon and tightened proximally onto the rifle's receiver. 19. The rifle forend assembly of claim 18, wherein said forend assembly, including said forend tube extension are configured to be aligned with the distal end of a rifle's receiver and a rifle's barrel such that said Forend tube extension may be aligned with and placed in abutment against a distal endwall surface of the rifle's receiver and the tube extension carries one or more tube extension flange indexing pins which are configured for insertion into one or more receiver endwall slots which may then index the radial or angular orientation of forend tube extension and thus the entire forend assembly on the rifle's receiver. 20. The rifle forend assembly of claim 19, wherein said Collar assembly includes forend tube nut which is configured to engage and support the forend tube extension to define a distally projecting segment of slightly reduced diameter cylindrical sidewall which may fit snuggly within an open proximal end of and engage the forend tube member; and the tube extension is configured to be affixed to the forend tube member by installation of a plurality of transverse dowel pins which are received in radially arrayed transverse bores defined in the cylindrical sidewall of said tube extension and in the sidewall of the tubular member where the tubular member's bores are defined in the sidewall near its proximal end. 21. A rifle forend assembly configured for attachment to a rifle's receiver, comprising: a forend with an external wall surface providing an enhanced accessory mount interface having a plurality of sunken ergonomic rail mount sections with snag-free outer contours defined in the external wall surface;wherein each sunken ergonomic rail mount section is formed of at least first and second transversely aligned, parallel rounded notches, each shaped as a trough or radiussed groove having a substantially linear groove bottom surface which is bounded by angled wall segments, where the angle between the linear groove bottom surface and the angled wall segments at opposing ends is 45 degrees;wherein each sunken rail mount section thus defines an integral sunken rail segment having spaced notches terminating in angled wall segments which terminate laterally at opposing ends to define a rail segment width of 0.835 inches,wherein the lateral ends of each rail section notch are configured as laterally opposed wedge-shaped clamping surfaces which each define an outside corner rebated wall segment which intersects the outwardly facing angled wall segment at 90 degrees, andwherein said sunken rail mount section clamping surfaces are within or inside of the outer circumferential surface of the forend's outer surface. 22. The rifle forend assembly of claim 21, wherein said forend's outer surface has an outside diameter of approximately two inches and is knurled or textured, to provide a comfortable but secure gripping surface. 23. The rifle forend assembly of claim 21, wherein said transverse notches are defined in said sidewall outer surface which is tubular, and wherein said notches are defined between and bounded by first and second spaced elongated grooves in the inter-groove width, and the transverse notches extend substantially from the first elongated groove to the second elongated groove and so extend substantially all the way across the inter-groove width. 24. The rifle forend assembly of claim 23, wherein the linear transverse distance between the elongated grooves is the inter-groove width, along the transverse notches which is 21.2 mm or 0.835 inches and the same as the width of the top of a traditional Picatinny Rail segment, so accessories which are compatible with the Picatinny rail platform (MIL-STD-1913 or STANAG 2324) will easily engage and hold onto the forend assembly sidewall surface, where the transverse notch and the sidewall's elongate groove edges define the first and second elongated non-perforating grooves, all of which cooperate to provide an enhanced, snag-free mounting interface. 25. The rifle forend assembly of claim 21, wherein said mount interface is configured as a forend assembly adapted for use with a precision rifle or a service rifle which is adapted for attachment to releasable Picatinny-style mounts at multiple attachment locations along four quadrants while also allowing indexing of the forend assembly at multiple angular locations relative to the rifle. 26. The rifle forend assembly of claim 21, wherein each of transverse mounting notches has a cross sectional shape which is rounded or radiused, and said sunken rail mount provides a snag free surface which is configured to receive an accessory configured with a clamp to engage a MIL-STD-1913 Picatinny Rail mount, clamping inwardly against and compressing while engaging the opposing notch edge surfaces.
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