WO2020131601A1 - Dispositif de suppression et procédés associés - Google Patents

Dispositif de suppression et procédés associés Download PDF

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Publication number
WO2020131601A1
WO2020131601A1 PCT/US2019/066136 US2019066136W WO2020131601A1 WO 2020131601 A1 WO2020131601 A1 WO 2020131601A1 US 2019066136 W US2019066136 W US 2019066136W WO 2020131601 A1 WO2020131601 A1 WO 2020131601A1
Authority
WO
WIPO (PCT)
Prior art keywords
wall
baffle
baffles
suppression device
inlet
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.)
Ceased
Application number
PCT/US2019/066136
Other languages
English (en)
Inventor
Jeffrey S. Grant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US16/372,295 external-priority patent/US11268777B1/en
Application filed by Individual filed Critical Individual
Publication of WO2020131601A1 publication Critical patent/WO2020131601A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F41A21/34—Flash dampers
    • 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
    • F41A21/30—Silencers
    • 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
    • F41A21/36—Muzzle attachments or glands for recoil reduction ; Stabilisators; Compensators, e.g. for muzzle climb prevention

Definitions

  • the present invention relates to devices and methods for the reduction of noise, flash and recoil from the sudden release of gas or other fluid, and more particularly, to the reduction of noise, flash from the discharge of a firearm.
  • a shockwave has a sharp change of pressure in a narrow region traveling through a medium, especially air.
  • the shockwave is the result of gas exceeding the speed of sound.
  • Typical devices designed to suppress firearms are composed of a series of baffles. The size and shape of the baffles vary greatly. They are generally designed to obstruct the forward flow of the gas. While existing suppression devices are useful, further improvements are possible. Summary of the Invention
  • a firearm According to an embodiment of the present invention, a firearm
  • suppression device comprises an outer wall extending around a propagation path between outer wall inlet and outlet ends an outer wall extending around a propagation path between outer wall inlet and outlet ends, one or more baffles extending inwardly from the outer wall toward the propagation path between the outer wall inlet and outlet ends, and one or more inner wall sections corresponding to the baffles and extending around the propagation path inwardly of the outer wall and outwardly of the baffle opening of the corresponding one of the plurality of baffles such that a circumferential volume is defined between the outer wall and the at least one inner wall section.
  • Each baffle defines a baffle opening between a baffle inlet face and a baffle outlet face through which the propagation path passes, and is preferably angled toward the outer wall inlet end from the outer wall.
  • Each inner wall section extends around the propagation path inwardly of the outer wall and outwardly of the baffle opening of the corresponding one of the baffles such that a circumferential volume is defined between the outer wall and the inner wall section.
  • Each inner wall section extends from the corresponding baffle toward the outer wall inlet end between inner wall section first and second ends, and adjoins the baffle inlet face of the corresponding baffle at the first end.
  • First and second fluid flow paths are defined through the inner wall section first and second ends, respectively, that communicate with the circumferential volume.
  • a portion of fluid propagating along the propagation path will be deflected by the baffle inlet face of the baffle through the first fluid flow path into the circumferential volume, and out the second fluid path back toward the propagation path.
  • a method of shockwave suppression includes channeling a shockwave from a muzzle of the firearm (or other shockwave source) into a suppression device along a firing axis (or other propagation path), and within the suppression device, deflecting a portion of the shockwave away from the firing axis, and channeling the deflected portion through a feedback path and back to a region behind the deflected shockwave.
  • Figure 1 is a perspective view of a suppression device according to an embodiment of the present invention, from an outlet end thereof;
  • Figure 2 is a perspective view of the suppression device of Figure 1 , from an inlet end thereof;
  • Figure 3 is an outlet end view of the suppression device of Figure 1 ;
  • Figure 4 is a cross-sectional view of the suppression device of Figure 1 , taken along line 4-4 of Figure 3;
  • Figure 5 is a perspective view of a diffuser of the suppression device of Figure 1 ;
  • Figure 6 is a perspective view of a muzzle connector of the suppression device of Figure 1 ;
  • Figure 7 is a perspective view of a first type of chamber of the suppression device of Figure 1 , from an inlet end thereof;
  • Figure 8 is an outlet end view of the chamber of Figure 7;
  • Figure 9 is a cross-sectional view of the chamber of Figure 7, taken along line 9-9 of Figure 8;
  • Figure 10 is a perspective view of a second type of chamber of the suppression device of Figure 1 , from an outlet end thereof;
  • Figure 11 is an inlet end view of the chamber of Figure 10;
  • Figure 12 is a cross-sectional view of the chamber of Figure 10, taken along line 12-12 of Figure 11 ;
  • Figure 13 is a detail view of a portion of the cross-sectional view of Figure 4, including a feedback circulation established therein.
  • a suppression device 10 includes an outer wall 12 extending around a propagation path 14 between inlet and outlet ends 16, 20.
  • the inlet end 16 is configured for attachment to the muzzle of a firearm, such that the propagation path is collinear with the firing axis.
  • a plurality of baffles 22A, 22B extend inwardly from the outer wall 12 toward the propagation path 14.
  • Each of the baffles 22A, 22B defines a baffle opening 24A, 24B through which the propagation path 14 passes.
  • a plurality of inner wall sections 26 extend from respective ones of the baffles 22A, 22B toward the inlet end 16 around the propagation path 14 inwardly of the outer wall 12 such that a plurality of circumferential volumes 28 are defined.
  • First and second fluid flow paths 30, 32 extend through each inner wall section 26 at first and second ends thereof 34, 36.
  • a portion of the fluid propagating along the propagation path i.e. , as part of a shockwave
  • a diffuser 40 is arranged at the outlet end 20 of the outer wall 12.
  • the diffuser 40 includes a outlet plate 42 defining an exit opening 44 concentric with the propagation path 14, which has an inner diameter preferably less than or equal to the diameter of the adjacent baffle opening 24B.
  • a plurality of vent openings 46 are defined around the exit opening 44.
  • the projectile exits through the exit opening 44 after passing through the aligned baffle openings 24A, 24B.
  • the diffuser 40 threads into the outlet end 20.
  • a firearm muzzle connector 50 is arranged at the outer wall inlet end 16.
  • the muzzle connector 50 includes an inlet plate 52 defining a muzzle attachment opening 54 concentric with the propagation flow path 14 and the baffle openings 24A, 24B.
  • the muzzle attachment opening 54 is threaded or otherwise configured for attachment to the muzzle of a firearm.
  • the muzzle connector 50 itself, threads into or otherwise connects to the inlet end 16.
  • an outlet face 56 of the inlet plate 52 is frustoconical surrounding the muzzle attachment opening 54, matching the angles of the baffles 22A, 22B.
  • each of the baffles 22A, 22B is angled from the outer wall 12 toward the outer wall inlet end 20.
  • the baffles 22A, 22B are preferably evenly spaced along the propagation path 14, with the inner wall sections 26
  • baffles 22A with larger baffle openings 24A are advantageously arranged closer to the outer wall inlet end 16, and the baffles 22B with smaller baffle openings 24B are closer to the outlet end 20.
  • each of the baffles 22A, 22B is preferably equal - and most preferably angled at 45 degrees.
  • Each baffle 22A, 22B is advantageously frustoconical, with its baffle opening 24A, 24B being formed at the missing tip thereof.
  • the fluid flow paths 30, 32 are angled toward the outlet wall inlet end 20 from the circumferential volume 28.
  • the angles of the first and second fluid flow paths 30, 32 equal the angles of the baffles 22A, 22B.
  • each of the fluid flow paths 30, 32 is formed by a plurality of holes extending round their respective inner wall section first and second ends 34, 36.
  • the diameters of the holes of the first fluid flow path 30 are preferably greater than the diameters of the holes of the second fluid flow path 32.
  • the numbers of holes in the first and second flow paths 30, 32 is preferably equal.
  • each baffle 22A, 22B and its corresponding inner wall section 26 is advantageously formed as a unitary piece - the chambers 60A, 60B, each of which is separately removable from the outer wall 12.
  • the first end 34 of the inner wall section 26 adjoins an inlet face 62A, 62B of the baffle 24A, 24B.
  • the second end 36 is chamfered to match the conical profile of the outlet faces 64A, 64B (and of the outlet face 56 of the muzzle connector 50). Consequently, each chamber 60A, 60B is self-centering when inserted into the outer wall 12. To further improve radial stability of the chambers 60A, 60B and the seal between successive
  • annular collar 66 can extend outwardly from each inner wall section second end 36.
  • a shockwave (represented by arrows) is channeled into the suppression device 10 generally along the propagation path 14 (e.g., the firing axis proceeding from the muzzle in a firearms application).
  • shockwave Portions of the shockwave are slowed and deflected upon encountering each of the successive baffles 22A, with somewhat less of the shockwave passing through each opening 24A. A significantly greater portion of the shockwave is slowed and deflected upon reaching the larger baffles 22B with the smaller openings 24B.
  • shockwave enters a feedback path through the first fluid flow paths 30 at areas 70A, into the circumferential volume 28, and back out the second fluid flow path 32 to a lower pressure region behind the deflected shockwave.
  • this feedback circulation continues - with successively decreasing force moving from the inlet end 16 to the outlet end 20.
  • the shockwave is dissipated until fluid flow velocity is at or below subsonic levels.
  • the spacing between baffles should be long enough so that the pressure building up at the first fluid flow path 30 begins driving feedback circulation before the pressure at the second fluid flow path 32 counters the desired circulation.
  • excessive baffle spacing can delay initiation of feedback circulation such that its impact on the overall dissipation of the shockwave is decreased.
  • the use of larger holes for the first fluid flow path 30 relative to the second fluid flow path 32 helps facilitate initiation and maintenance of the desired feedback flow.
  • the use of equal numbers of holes at the same circumferential positions helps achieve a symmetrical reflow of fluid along the feedback path.
  • devices and methods according to the present invention advantageously provide a feedback path from the high pressure area of a shock wave to the low pressure area following the shockwave. This action
  • the modular nature of the depicted suppressor device 10, employing an outer wall 12 with separate chambers 60A, 60B is advantageous with respect to design, manufacture and maintenance.
  • any number and combination of chambers 60A, 60B can be arranged within a suitably dimensioned outer wall.
  • the inlet and/or outlet ends can be equipped with various fittings, couplers, quick disconnects, terminators or the like.
  • a suppressor device could be made within the scope of the present invention in which some or all of the baffles and/or inner wall sections could be formed integrally with the outer wall.
  • the depicted outer wall 12 and chambers 60A, 60B are generally cylindrical, the present invention does not necessarily require this.
  • Other outer wall and chamber geometries, including rectangular/square cross-sections, oval cross-sections and even varying cross-sections could also be advantageously employed.
  • the baffle openings 24A, 24B are aligned along a central axis of the outer wall 12.
  • the present invention could include baffle openings aligned along some other common axis within the outer wall. Additionally, in applications where a solid projectile is not required to pass through the baffle openings, configurations could potentially be used where a strict collinear arrangement of openings is not employed. Moreover, the size, shape, angle, number and pattern of fluid flow path openings can be varied.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

Selon la présente invention, une suppression d'onde de choc est réalisée par canalisation d'une onde de choc provenant d'une source d'onde de choc, telle qu'une arme à feu, dans un dispositif de suppression le long d'un trajet de propagation, et à l'intérieur du dispositif de suppression, par déviation d'une partie de l'onde de choc à l'opposé de l'axe de tir, et par canalisation de la partie déviée dans un trajet de rétroaction et vers une région derrière l'onde de choc déviée. Le dispositif de suppression peut être formé à partir d'une ou plusieurs chambres agencées à l'intérieur d'une paroi externe et comprenant des déflecteurs et des sections de paroi interne.
PCT/US2019/066136 2018-12-20 2019-12-13 Dispositif de suppression et procédés associés Ceased WO2020131601A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201862782467P 2018-12-20 2018-12-20
US62/782,467 2018-12-20
US16/372,295 2019-04-01
US16/372,295 US11268777B1 (en) 2018-03-31 2019-04-01 Suppression device and related methods

Publications (1)

Publication Number Publication Date
WO2020131601A1 true WO2020131601A1 (fr) 2020-06-25

Family

ID=71102311

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2019/066136 Ceased WO2020131601A1 (fr) 2018-12-20 2019-12-13 Dispositif de suppression et procédés associés

Country Status (1)

Country Link
WO (1) WO2020131601A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1017003A (en) * 1910-05-16 1912-02-13 Charles H Kenney Silencer for firearms.
US6575074B1 (en) * 2002-07-23 2003-06-10 Joseph D. Gaddini Omega firearms suppressor
US8844422B1 (en) * 2011-09-16 2014-09-30 Ut-Battelle, Llc Suppressor for reducing the muzzle blast and flash of a firearm
US20160209152A1 (en) * 2015-01-16 2016-07-21 Surefire, Llc Laser welded firearm sound suppressors
US20170102202A1 (en) * 2015-03-04 2017-04-13 Victor Miles As Silencer with expansion chambers and manufacturing method thereof
US20180135932A1 (en) * 2016-10-26 2018-05-17 Nicholas Tomczak Suppressor for a firearm

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1017003A (en) * 1910-05-16 1912-02-13 Charles H Kenney Silencer for firearms.
US6575074B1 (en) * 2002-07-23 2003-06-10 Joseph D. Gaddini Omega firearms suppressor
US8844422B1 (en) * 2011-09-16 2014-09-30 Ut-Battelle, Llc Suppressor for reducing the muzzle blast and flash of a firearm
US20160209152A1 (en) * 2015-01-16 2016-07-21 Surefire, Llc Laser welded firearm sound suppressors
US20170102202A1 (en) * 2015-03-04 2017-04-13 Victor Miles As Silencer with expansion chambers and manufacturing method thereof
US20180135932A1 (en) * 2016-10-26 2018-05-17 Nicholas Tomczak Suppressor for a firearm

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