US3769731A - Anti-fouling shot pattern control device - Google Patents
Anti-fouling shot pattern control device Download PDFInfo
- Publication number
- US3769731A US3769731A US00249823A US3769731DA US3769731A US 3769731 A US3769731 A US 3769731A US 00249823 A US00249823 A US 00249823A US 3769731D A US3769731D A US 3769731DA US 3769731 A US3769731 A US 3769731A
- Authority
- US
- United States
- Prior art keywords
- cage
- shot
- apertured
- gap
- tube
- 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.)
- Expired - Lifetime
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Classifications
-
- 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
- F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
- F41A21/32—Muzzle attachments or glands
- F41A21/40—Chokes for shotguns, e.g. automatic chokes
Definitions
- ABSTRACT 52 us. (:1. 42/79 a known type of 14 muzzle device comprising [51] lint. Cl. F4lc 21/18 an outer apertured cage mounted by an adapter to the [58] Field 01' Search 42 79 89/14 B 14 c gun muzzle and maining shot-Passing tube Spaced 239/14 D, 14 15:14 from the muzzle and adapter to provide a gas release gap, the invention provides an apertured interceptor 56] References Cited serving to prevent or minimize entry of shell wad debris UNITED STATES PATENTS into the outer cage apertures.
- one type of shot gun muzzle device employs an outer apertured cage having an adapter mounting to the gun barrel and containing a shot-passing tube, the forward end of which is threaded into the cage with the rear end of the tube spaced from the adapter to form a gap from which the shell gases generated upon firing are vented out through the cage apertures.
- the shell wads have thin appendages, sometimes longitudinally split, which leave the gun barrel in conjunction with the shot charge and upon traversing the gap before entering the shot tube tend to disintegrate at least partially into debris that may enter and partially clog the cage apertures.
- the invention has for its general object to prevent or minimize blockage of the cage apertures by providing within the inter-tube and adaptor gap an interceptor which in effect separates free wad particles from the outwardly vented gases and in so doing guides them into the shot tube in advance of allowing them to enter or foul the cage apertures.
- the interceptor is made in tubular apertured form and is so accommodated as to span the gap inwardly opposite the cage aperture subject to fouling.
- the interceptor is separately formed of resilient metal, such as spring steel, and is retainable in fixed position by tightening of the shot tube to press the interceptor against the adaptor.
- the interceptor is made of relatively thin resilient metal in stamped and circularly rolled form having apertures, such as longitudinal slots,
- the interceptor may be formed with terminal flanges which facilitate both axial alignment of the interceptor relative to the tube and cage and circularly uniform spacing from the cage wall.
- the invention also contemplates the provision of interceptors in other forms, typically as a coil spring bridging the gas release gap and-held in pressed engagement with the adapter by rotational adjustment of the shot tube.
- the spring may be continued to encircle the shot tube for confinement between the adapter and an enlarged threaded end of the tube.
- FIG. 4 is a longitudinal section taken on line 4-4 of FIG. 2;
- FIG. 5 is a view similar to FIG. 1 illustrating a variational form of the invention.
- FIGS. 1 and 5 are illustrative of a known type of shot gun muzzle device embodying the interceptor feature of the invention. As heretofore constructed this type of device has been made to comprise a tubular cage 10 the wall of which is slotted or apertured as at 1 1 to provide for the venting of gases released upon the firing of a shot gun shell. It will be understood that the cage apertures may have any of various configurations, the angular form shown being merely illustrative. The slots may continue to and intersect at the bottom of the cage so as toform chevron-shaped openings.
- the cage is mounted to the gun'muzzle 12 by an adaptor 13 at the rear of a gap 14 traversed axially of the device by the shell wad and in conjunction with the shot charge before entering the shot tube 15.
- the later is annularly spaced at 16 from the forward extent of the cageand has an integrally formed head or nut 17 of shot control tube 15 threaded at 18 into the cage.
- the tube may have any of the various bore configurations selectable to'control the shot emission pattern upon discharge from the tube. Again merely as illustrative,-the tube bore is shown to have a flared inlet end 19 beyond which the bore has a degree of forward taper.
- the gap 14 its axial length is predetermined in relation to the shell wad and shot charge so that at least the wad will traverse the gap before entry into the tube 16.
- the wads in present day shot gun shells have thin trailing appendages, sometimes slitted at circular intervals, which may tend to become disintegrated by the force of the shell blast, freeing particles tending to accumulate within and clog the apertures 11 at the outside of the gap. It is a major object of the invention to intercept such wad particles before their entry to the cage apertures and in a' manner allo'wingrelease of gases from the gap region through the cage while directing the total wadp articles and'shot into'the tube 15'.
- an apertured tubular interceptor 20 is accommodated within the device to bridge the gap 14.
- the preferred interceptor as detailed in FIG. 2 may be made of thin spring steel as a stamping 21 containing longitudinal slots 22 and rolled into essentially circular form, see FIG. 3, leaving a split or gap at 23. In its cirto bear respectively against the inner ends of the shot tube and adaptor 13. Peripherally the flange 24 is recessed at circularly spaced intervals 26 to allow communication between the gap 14 and thespace about the .shot tube 15.
- FIG. 3 is an end elevationof the interceptor as viewed from plane 3-3 of FIG. 2;
- FIG. 5 employs as a substitute for the described interceptor, a coil spring 27 which also bridges the gap 14 and is of open configuration to permit the gas release and filtering effect.
- a coil spring 27 which also bridges the gap 14 and is of open configuration to permit the gas release and filtering effect.
- an interceptor in the form of a coil spring may be accommodated in various manners, a simple approach is to place about the tube 15 a spring 27 of sufficient length to bridge the gap 14 and bear against the inner end of the adaptor 13. To ease the axial resistance of the spring it may be formed with gap-bridging turns 27a of smaller diameter wire having reduced resistance to axial compression as the shot tube is tightened into the cage.
- a shotgun muzzle device of the type having an outer apertured tubular cage mountable to the end of a gun barrel by an adapter and containing a shotpassing tube annularly spaced from the cage and mounted to the forward end thereof, the rear inner end of the tube being spaced forwardly from the adapter to provide a gap from which shell firing gases are vented to atmosphere through the cage apertures; the improvement comprising a tubular apertured insert in said gap opposite the cage apertures and serving to intercept shell wad debris from entry into the cage apertures, said insert having the form of an apertured relatively thin tubular element spaced from an apertured extent of the cage and having terminal flanges bearing against the adapter and shot-passing tube.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Nozzles (AREA)
Abstract
Description
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US24982372A | 1972-05-03 | 1972-05-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3769731A true US3769731A (en) | 1973-11-06 |
Family
ID=22945171
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00249823A Expired - Lifetime US3769731A (en) | 1972-05-03 | 1972-05-03 | Anti-fouling shot pattern control device |
Country Status (1)
Country | Link |
---|---|
US (1) | US3769731A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5157211A (en) * | 1992-01-31 | 1992-10-20 | O. F. Mossberg & Sons Inc. | Choke tube assembly |
US5452535A (en) * | 1993-06-04 | 1995-09-26 | Impromark, Inc. | Shotgun shell wad/shot cup retarding device |
US5587549A (en) * | 1995-07-03 | 1996-12-24 | Jana, Inc. | Angular porting system and shotgun barrel equipped therewith |
US6112447A (en) * | 1998-09-11 | 2000-09-05 | B.B.A. Research & Development, Inc | Shotgun choke |
US6128846A (en) * | 1998-06-08 | 2000-10-10 | Inpromark, Inc. | Length shotgun choke tube |
US6722254B1 (en) * | 2001-11-14 | 2004-04-20 | Robert B. Davies | Muzzle brake |
US20050066803A1 (en) * | 2001-11-08 | 2005-03-31 | Herbert Rosenthal | Reverse thrust system with integral conduits and nozzles for the reduction of muzzle jump and/or recoil in firearms and weapons |
US20060010750A1 (en) * | 2004-04-21 | 2006-01-19 | Ryosuke Yoshitaka | Choke tube |
US20080173166A1 (en) * | 2007-01-23 | 2008-07-24 | Andry Mark L | Shotgun choke |
US7886650B1 (en) | 2001-11-08 | 2011-02-15 | Herbert Rosenthal | Reverse thrust system with integral conduits and nozzles for the reduction of muzzle jump and/or recoil in firearms and weapons |
US7895787B1 (en) * | 2008-01-11 | 2011-03-01 | Andry Mark L | Porting feature for firearm |
US8025003B1 (en) * | 2009-10-14 | 2011-09-27 | The United States Of America As Represented By The Secretary Of The Navy | Fluted firearm barrel |
US10996015B2 (en) * | 2017-04-27 | 2021-05-04 | Nssip Llc | Firearm adapter |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH48612A (en) * | 1910-05-11 | 1910-11-16 | O Dr Jurnitschek | Sonic and recoil breakers |
US1127250A (en) * | 1914-05-23 | 1915-02-02 | Friedrich W L Graf | Silencer. |
US2447205A (en) * | 1945-05-15 | 1948-08-17 | Powell Edward Baden | Shotgun muzzle device |
US2589171A (en) * | 1949-06-23 | 1952-03-11 | Italo D Vironda | Shotgun choke and compensator |
US3367055A (en) * | 1965-12-27 | 1968-02-06 | Powell Edward Baden | Shotgun muzzle device comprising a compensator and choke |
-
1972
- 1972-05-03 US US00249823A patent/US3769731A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH48612A (en) * | 1910-05-11 | 1910-11-16 | O Dr Jurnitschek | Sonic and recoil breakers |
US1127250A (en) * | 1914-05-23 | 1915-02-02 | Friedrich W L Graf | Silencer. |
US2447205A (en) * | 1945-05-15 | 1948-08-17 | Powell Edward Baden | Shotgun muzzle device |
US2589171A (en) * | 1949-06-23 | 1952-03-11 | Italo D Vironda | Shotgun choke and compensator |
US3367055A (en) * | 1965-12-27 | 1968-02-06 | Powell Edward Baden | Shotgun muzzle device comprising a compensator and choke |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5157211A (en) * | 1992-01-31 | 1992-10-20 | O. F. Mossberg & Sons Inc. | Choke tube assembly |
US5452535A (en) * | 1993-06-04 | 1995-09-26 | Impromark, Inc. | Shotgun shell wad/shot cup retarding device |
US5587549A (en) * | 1995-07-03 | 1996-12-24 | Jana, Inc. | Angular porting system and shotgun barrel equipped therewith |
US6128846A (en) * | 1998-06-08 | 2000-10-10 | Inpromark, Inc. | Length shotgun choke tube |
US6112447A (en) * | 1998-09-11 | 2000-09-05 | B.B.A. Research & Development, Inc | Shotgun choke |
US7377205B2 (en) | 2001-11-08 | 2008-05-27 | Herbert Rosenthal | Reverse thrust system with integral conduits and nozzles for the reduction of muzzle jump and/or recoil in firearms and weapons |
US20050066803A1 (en) * | 2001-11-08 | 2005-03-31 | Herbert Rosenthal | Reverse thrust system with integral conduits and nozzles for the reduction of muzzle jump and/or recoil in firearms and weapons |
US7886650B1 (en) | 2001-11-08 | 2011-02-15 | Herbert Rosenthal | Reverse thrust system with integral conduits and nozzles for the reduction of muzzle jump and/or recoil in firearms and weapons |
US6722254B1 (en) * | 2001-11-14 | 2004-04-20 | Robert B. Davies | Muzzle brake |
US7140140B2 (en) * | 2004-04-21 | 2006-11-28 | Tohoseiki Co., Inc. | Choke tube |
US20060010750A1 (en) * | 2004-04-21 | 2006-01-19 | Ryosuke Yoshitaka | Choke tube |
US20080173166A1 (en) * | 2007-01-23 | 2008-07-24 | Andry Mark L | Shotgun choke |
US7895787B1 (en) * | 2008-01-11 | 2011-03-01 | Andry Mark L | Porting feature for firearm |
US20110067284A1 (en) * | 2008-01-11 | 2011-03-24 | Andry Mark L | Porting feature for firearm |
US8025003B1 (en) * | 2009-10-14 | 2011-09-27 | The United States Of America As Represented By The Secretary Of The Navy | Fluted firearm barrel |
US10996015B2 (en) * | 2017-04-27 | 2021-05-04 | Nssip Llc | Firearm adapter |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: PACHMAYR GUN WORKS, INC. 1220 SOUTH GRAND AVE. LOS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:PACHMAYR, FRANK A.;FARRAR, JACK R.;REEL/FRAME:003989/0417 Effective date: 19820121 |
|
AS | Assignment |
Owner name: PACHMAYR GUN WORKS, INC. (FORMERLY PURCO, INC.) Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PACHMAYR GUN WORKS, INC. A CA CORP.;REEL/FRAME:003951/0617 Effective date: 19820129 |
|
AS | Assignment |
Owner name: PACHMAYR, NANITTA G., 2845 MEDILL PLACE, LOS ANGEL Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. SUBJECT TO CONDITIONS RECITED;ASSIGNOR:PACHMAYR GUN WORKS, INC. A CORP. OF CA.;REEL/FRAME:003960/0799 Effective date: 19820129 Owner name: PACHMAYR, FRANK A., 2845 MEDILL PLACE, LOS ANGELES Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. SUBJECT TO CONDITIONS RECITED;ASSIGNOR:PACHMAYR GUN WORKS, INC. A CORP. OF CA.;REEL/FRAME:003960/0799 Effective date: 19820129 |