EP2191223B1 - Suppresseur pour arme à feu - Google Patents

Suppresseur pour arme à feu Download PDF

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Publication number
EP2191223B1
EP2191223B1 EP08874639A EP08874639A EP2191223B1 EP 2191223 B1 EP2191223 B1 EP 2191223B1 EP 08874639 A EP08874639 A EP 08874639A EP 08874639 A EP08874639 A EP 08874639A EP 2191223 B1 EP2191223 B1 EP 2191223B1
Authority
EP
European Patent Office
Prior art keywords
suppressor
ejector
housing
mixer
nozzle
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.)
Not-in-force
Application number
EP08874639A
Other languages
German (de)
English (en)
Other versions
EP2191223A2 (fr
Inventor
Walter M. Presz, Jr
Michael J. Werle
Bart Lipkens
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.)
FloDesign Inc
Original Assignee
FloDesign Inc
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
Application filed by FloDesign Inc filed Critical FloDesign Inc
Publication of EP2191223A2 publication Critical patent/EP2191223A2/fr
Application granted granted Critical
Publication of EP2191223B1 publication Critical patent/EP2191223B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F41A21/30—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
    • F41A21/34—Flash dampers

Definitions

  • the present invention deals generally with firearms. More particularly, it deals with noise and flash suppressors for firearm muzzles.
  • the first two core elements are: the precursor blast; and a main blast set up by the expanding gases.
  • the precursor blast consists of mostly air with a small amount of propellant and the main blast is made up of spherical pressure waves that quickly overtake the fired projectile. Both of these blasts are sources of low frequency noise that carry very far distances.
  • the third core element is the highly visible gas flash which follows the blast.
  • a gas flash occurs because air mixes with the fuel rich propellants and the high temperatures from the blast waves. The result of this mixture forms a gas flash which is greatly increased in the secondary flow region that occurs away from the muzzle of a firearm.
  • a gas flash When a gas flash forms, it occurs in three parts: primary, intermediate, and secondary flashes.
  • the primary flash forms at the muzzle in the supersonic flow region and is very small.
  • An intermediate flash occurs directly behind the projectile, but in front of the Mach disk leading any supersonic flow region. (Not all firearms have supersonic discharge flows.)
  • the secondary flash is the most severe, and it occurs downstream of the firearm muzzle, and after the normal shock resulting from the muzzle gas over-expansion. The large flash seen when firing a projectile is actually the secondary flash.
  • the individual components can be analyzed to assess their critical components.
  • the blast wave is essentially a spherical blast wave that travels rapidly but also decays rapidly both strength-wise and time/distance-wise.
  • Relative to the flow-field attendant to the flash it establishes after or behind the main blast wave with a structure very similar to that of a traditional under-expanded jet plume often seen in propulsion applications.
  • the key elements of the post-blast wave flow field are the free jet boundary and the highly under-expanded jet flow region all flowing strongly in the downstream axial direction.
  • the over-expanded gas results in the normal shock or Mach disk, which causes the secondary flash and a significant portion of the noise.
  • the important point is that the key physics of this type of flow structure is common in propulsion aerodynamics, and can be used to generate performance correlations for use in developing more efficient suppressor designs.
  • the cooling device comprises a short sleeve in the interior of which three ring members are arranged and secured to the inside surface of the sleeve by radial fins.
  • the three rings are specifically arranged in the annular space between sleeve and the central bullet passage way. These rings are - in the longitudinal direction - first diverging and thereafter converging.
  • the ring members acting as aspirating rings confine the expansion of an expanding flame sheet issued from the barrel muzzle and create a suction at and beyond the gun muzzle which causes a flow of air along the barrel, the air entering the annular space between the barrel and the jacket through airports.
  • US 1,860,276 is concerned with a firearm and discloses a firearm suppressor comprising a sleeve that is fixed on the outside of the gun near its mother in any convenient manner as for instance by screwing.
  • Ejectors use viscous forces to lower the velocity and energy of a jet stream by ingesting lower energy flow which can lead to flow characteristics that may augment thrust, cool exhaust gases, suppress jet infrared signature, and importantly to ballistic applications, reduce attendant noise and flash.
  • Mixers improve the performance characteristics of ejectors by inducing stirring, or axial vortices, that promote rapid mixing of the high velocity primary jet with the cooler, and sometimes heavier, ingested gas; thus resulting in more compact devices. Numerous patented products have derived from this concept.
  • the mixer/ejector concept is well accepted within the aviation and jet propulsion community as an extremely efficient solution to aircraft noise and exhaust temperature suppression.
  • Gas turbine technology has yet to be applied successfully to firearm muzzle suppressors. If one were to replace an under-expanded jet engine exhaust for a ballistic blast from a firearm, in which hot gases are mixed and expelled with a projectile over the length of the barrel, it may be seen that such a technology could significantly reduce noise, flash, and provide outside air to the barrel that could be employed to cool and clean the suppressor components.
  • Applicants have developed an improved firearm suppressor through the use of advanced mixer/ejector concepts. By recognizing and analyzing the blast and plume characteristics, inherent in ballistic discharges, Applicants have created a new two-step c ontrolled u naided s urge and p urge s ystem (nicknamed "CUSPS”) for firearm suppressors.
  • CCSPS c ontrolled u naided s urge and p urge s ystem
  • This new CUSPS approach attends to the blast surge effects by controlling the flow expansion into the suppressor, and attends to the flash effects by controlling inflow and outflow gas purging.
  • the CUSPS suppressor rapidly reduces the pressure energy associated with a firearm muzzle blast before it exits the suppressor, thereby reducing noise and muzzle flash.
  • the blast surge is mitigated through a rapid, divergent nozzle volume increase and thereafter through a series of vent holes strategically located around the suppressor outer wall.
  • the vent holes preferably converge towards the outside of the CUSPS.
  • the holes could be contoured with divergent or convergent/divergent area distributions.
  • air is ingested inward through the same holes, mixed with the muzzle gases and purged axially through the exit port and vent holes.
  • a two-stage supersonic mixer/ejector is used in the CUSPS suppressor to control or eliminate the Mach disk, while rapidly mixing and diluting the propellant with ambient air.
  • CUSPS suppressor will generate the following benefits: lower noise; hide or eliminates flash; integrate cooling and self-cleaning; maintain firearm accuracy at longer distances; and lessen the amount of powder residue inside barrels.
  • FIGS. 1A-1D labeled "Prior Art", illustrate four examples of prior firearm suppressors: conventional silencers ( FIG. 1A ); silencers with absorbent material ( FIG. 1B ); silencers with two-stage divergent diffuser ( FIG. 1C ); and silencers with three-stage divergent diffusers ( FIG. 1D ).
  • FIG. 2A is a perspective view, with portions broken away and removed, of an alternate embodiment of Applicants' CUSPS suppressor having a housing, a lobed mixer nozzle at a projectile entrance location, a "straight" expansion chamber inside the housing, and vent openings or holes distributed in the housing;
  • FIG. 2B is a perspective view, with portions broken away, of another alternate embodiment of Applicants' CUSPS suppressor with a swirl nozzle at the projectile entrance location instead of the lobed nozzle of FIG. 2A ;
  • FIG. 2C is a perspective view, with portions broken away, of another embodiment of Applicants' CUSPS suppressor with a slotted nozzle at the projectile entrance location instead of a swirl nozzle or a lobed nozzle;
  • FIG. 3 is a perspective view, with portions broken away, of another alternate embodiment of Applicants' CUSPS suppressor showing a divergent round nozzle at the projectile entrance location before the entrance lobed nozzle, and a single-stage ejector formed by the vent openings distributed on the suppressor outer surface;
  • FIG. 4 is a perspective view, with portions broken away, of another alternate embodiment of Applicants' CUSPS suppressor with a mixer shroud system detached from a divergent round entrance nozzle forming a two-stage ejector;
  • FIG. 5A is a perspective view, with portions broken away, of another alternate embodiment of Applicants' CUSPS suppressor with a mixer shroud system detached from an entrance mixer nozzle forming a two-stage mixer/ejector;
  • FIG. 5B shows the same two-stage mixer/ejector system of FIG. 5A , but with vent holes added to the exit port location of the suppressor;
  • FIG. 6 is a perspective view, with portions broken away, of another alternate embodiment of Applicants' CUSPS suppressor with a mixer/ejector system detached from the divergent entrance nozzle forming a three-stage ejector system;
  • FIG. 7 is a perspective view, with portions broken away, of another alternate embodiment of Applicants' CUSPS suppressor with a mixer/ejector system detached from the divergent entrance nozzle, forming a three-stage ejector system, and a convergent-divergent supersonic diffuser in an expansion chamber of the suppressor;
  • FIG. 8A shows a perspective views, with portions broken away, of Applicants' preferred CUSPS embodiment: a detachable suppressor with two expansion chambers; a first-stage mixer/ejector in a first expansion chamber comprising a lobed nozzle at the entrance to the first expansion chamber, a lobed ejector, and vent holes to draw in outside air; a second-stage mixer/ejector comprising a lobed nozzle which extends into a second expansion chamber where vent holes are placed to draw in outside air; and a convergent-divergent diffuser as part of the suppressor exit port;
  • FIG. 8B shows the same system, as in FIG. 8A , but with slotted nozzles replacing the lobed nozzle;
  • FIG. 8C shows the same system, as in FIG. 8B , but with a round convergent nozzle at the entrance of the second expansion chamber;
  • FIG. 9 shows an integrated barrel CUSPS with ejector vent holes before the barrel exit and surrounding the barrel
  • FIG. 10A shows an integrated barrel CUSPS having a different shaped housing
  • FIG. 10B is a right-hand end view of FIG. 10A showing the housing is oval.
  • FIGS. 2A-10A show alternate embodiments of Applicants' CUSPS suppressor for firearms. Like elements in the drawings use the same element numbers.
  • the CUSPS is a detachable firearm suppressor comprising:
  • the preferred embodiment also includes a second-stage mixer/ejector system comprising: a lobed nozzle 127 which surrounds an end of the lobed ejector nozzle 117 and extends downstream into a second chamber 128; and vent holes 104 in the second chamber to draw in outside air.
  • a second-stage mixer/ejector system comprising: a lobed nozzle 127 which surrounds an end of the lobed ejector nozzle 117 and extends downstream into a second chamber 128; and vent holes 104 in the second chamber to draw in outside air.
  • vent holes 104 are preferably convergent. They narrow towards the outside of the suppressor.
  • FIG. 2A depicts an alternate embodiment of Applicants' CUSPS suppressor having a housing 102, a lobed mixer nozzle 116 at a projectile entrance location, a "straight" expansion chamber 130 with a constant diameter inside the housing, vent openings or holes 104 distributed in the housing; and slots or holes 114 at the suppressor exit plane.
  • FIG. 2B depicts an alternate embodiment of Applicants' CUSPS suppressor with a swirl nozzle 132 at the projectile entrance location, instead of Applicants' preferred lobed nozzle, and vent holes 104 distributed in the housing 102.
  • FIG. 2C depicts another embodiment of Applicants' CUSPS suppressor with a slotted nozzle 140 at the projectile entrance location, instead of a swirl nozzle 126 or a lobed nozzle 116, and vent holes 104 distributed in the housing 102.
  • FIG. 3 depicts another embodiment of Applicant's CUSPS suppressor with a lobed nozzle 116 attached to a round divergent nozzle 122 at the projectile entrance allocation and vent holes 104 distributed in the housing 102.
  • FIG. 4 depicts another alternate embodiment of Applicants' preferred CUSPS suppressor with a mixer shroud system 150, detached from a divergent round entrance nozzle 152, forming a two-stage ejector using vent openings 104 for the ejector distributed in the housing 102.
  • FIG. 5A depicts another alternate embodiment of Applicants' CUSPS suppressor with a mixer shroud 150 attached to the mixer nozzle 116 forming a two-stage mixer/ejector system 180 with vent openings 104 to draw in outside air.
  • FIG. 5B shows the same mixer/ejector system of FIG. 5A , but with vent holes 114 added to the exit port location 115 of the suppressor.
  • FIG. 6 depicts another alternate embodiment of Applicants' CUSPS suppressor.
  • This embodiment includes a mixer/ejector system 190 detached from the convergent entrance nozzle 152 forming a three-stage ejector system, and vent openings 104 distributed in the housing 102.
  • FIG. 7 depicts an alternate embodiment of Applicants' CUSPS suppressor with a mixer/ejector system 190 detached from the divergent entrance nozzle 122, forming a three-stage ejector system, vent openings 104 distributed in the housing's outer wall, and a convergent-divergent supersonic diffuser 204 in the expansion chamber 206 of the suppressor.
  • FIGS. 8B and 8C depict additional embodiments of Applicants' CUSPS suppressor, in which: FIG 8B shows the same system, as in FIG. 8A , but with slotted nozzles (like 140 in FIG. 2C ) replacing the lobed nozzles 116; and FIG. 8C shows the same system, as in FIG. 8B , but with a round convergent nozzle 218 at the entrance of the second expansion chamber 128;
  • FIG. 9 shows an integrated barrel CUSPS, similar to the preferred embodiment, with ejector vent holes 104 before the barrel exit and surrounding the barrel 103.
  • While the preferred CUSPS has lobed internal nozzles 116, 117, it could instead have slotted rounded internal nozzles. Both types have divergent area distributions to minimize flow overexpansion and reduce noise and flash.
  • Tubular housing 102 need not be circular in cross section. Its major axis is preferably horizontal ( i.e ., co-axial with the firearm barrel 103, or alternatively vertical (not shown), or in between (not shown).
  • the CUSPS can reduce the noise induced by the firearm's muzzle blast wave, reduce the radiant flash caused by the propellant gases and ingest ambient air to both cool the suppressor and purge it of residual gases, thereby increasing its useful life span.
  • the preferred CUSPS embodiment 100 will reduce the blast wave induced noise at three feet from the muzzle exit by 20 db or more, make the gas flash visually undetectable to an observer at any distance greater than 1000 muzzle diameters, and have an indefinite useful lifetime if properly maintained.
  • the entrance and lobed nozzle 116 serves to control and reduce the static pressure of the gases exiting the muzzle while the vent holes 104 first dissipate the blast wave from the muzzle gases and thereafter ingest ambient air to purge, dilute and cool the residual gases.
  • the ejector 117 lobes assist and amplify the air ingestion process, stir the ingested air into the muzzle gases to enhance their cooling and reduce the strength of the shock waves produced, which are further assisted by the convergent/divergent diffuser 127. Applicants believe their other disclosed embodiments will do the same.
  • the internal diameter of Applicants' preferred suppressor housing 102 is between two and ten muzzle external diameters to accommodate the range of propellant gases used in the firearm.
  • the CUSPS suppressor length is set between three and ten times its internal diameter to tailor its sound reduction to a desirable level.
  • FIGS. 10A and 10B an alternate configuration for the tubular housing 102 of the preferred CUSPS embodiment 100.
  • the housing employs a non-circular cross-section, here an oval.
  • vent holes 104 are established to assure sufficient dilution of the muzzle gases to reduce flash and purging of the residual gases.
  • the entrance divergent nozzle's exit diameter and length are established using classic gas dynamic principals to produce isentropic, or near isentropic, expansion of the muzzle gases into the suppressor.
  • exit nozzle diameter and length are established using classic gas dynamic principals to produce isentropic, or near isentropic, expansion of the muzzle gases out of the suppressor.
  • the mixer lobes, slots, tabs or swirl vanes have longitudinal, azimuthal and/or radial dimensions approximately equal to the radial dimensions of the entrance nozzle exit diameter and the suppressor internal diameter.
  • the ejector diameter is set between that of the entrance nozzle exit diameter and the suppressor internal diameter.
  • While the preferred embodiments are detachable from a gun, they can be affixed, more permanently, to the barrel.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)

Claims (12)

  1. Silencieux pour arme à feu, comprenant :
    - un boîtier de silencieux (102) s'étendant depuis l'extrémité à la bouche d'un canon d'arme à feu (103) ; et
    - des moyens pour contrôler et réduire la pression statique des gaz d'échappement qui s'échappent hors de la bouche d'une arme à feu lors de la décharge tout en dissipant une onde de déflagration hors de la bouche et introduisant ensuite de l'air ambiant à travers les trous d'évent pour purger, diluer et refroidir des gaz résiduels, lesdits moyens comprenant un mélangeur/éjecteur à un seul étage à l'intérieur du boîtier,
    caractérisé en ce que le boîtier de silencieux (102) est doté de trous d'évent (104), et
    - le mélangeur/éjecteur comprend au moins un dispositif mélangeur contenant des lobes ou ayant une buse fendue (140) ou une buse à tourbillonnement (132).
  2. Silencieux selon la revendication 1, dans lequel le mélangeur/éjecteur à un seul étage est prévu à l'intérieur d'une chambre d'expansion (113) du boîtier de silencieux (102) et comprend :
    - une buse mélangeuse à lobes (116), et
    - un éjecteur à lobes (117),
    dans lequel le mélangeur/éjecteur (116, 117) est adapté quant à sa taille et à sa forme à utiliser l'énergie cinétique des gaz qui s'échappent pour pomper de l'air extérieur ou de l'air ambiant en introduction et à travers les trous d'évent (104) pour refroidir et/ou nettoyer le silencieux et, à un degré moindre, refroidir à l'extrémité à la bouche, et dans lequel les contours des lobes internes pour le mélangeur (116) et l'éjecteur (117) sont en interaction à l'intérieur de la chambre d'expansion (113) pour mélanger l'air ambiant introduit, aspiré via les trous d'évent (104), avec les gaz d'échappement de l'arme à feu pour réduire le bruit et la flamme de l'arme à feu.
  3. Silencieux selon la revendication 1, dans lequel lesdits moyens comprennent en outre un mélangeur/éjecteur à deux étages à l'intérieur du boîtier.
  4. Silencieux selon la revendication 2 ou 3, comprenant un mélangeur/éjecteur avec un second étage comprenant :
    - une buse d'éjecteur à lobes (117) ; et
    - une buse à lobes (127) qui entoure une extrémité de la buse d'éjecteur à lobes (117) et s'étend en aval jusque dans une seconde chambre d'expansion (128).
  5. Silencieux selon la revendication 4, dans lequel des trous d'évent (104) sont prévus dans la seconde chambre d'expansion (128).
  6. Silencieux selon l'une quelconque des revendications 1 à 5, comprenant en outre :
    - un orifice d'entrée de projectile dans le boîtier (102), adjacent à l'extrémité de bouche, qui est adaptée quant à sa taille et à sa forme pour permettre à une onde de déflagration et aux gaz d'échappement provenant d'une arme à feu en cours de décharge, lors de leur sortie hors de l'extrémité de bouche, de se dilater à l'intérieur de la chambre d'expansion (113) ;
    - une buse divergente ronde (122), à l'orifice d'entrée de projectile, ayant une distribution de zone divergente adaptée quant à sa taille et à sa forme pour réduire une surdilatation du flux et la formation d'onde de choc, réduisant ainsi la flamme ; et
    - un orifice de sortie de projectile à une extrémité terminale du boîtier (102), ledit orifice de sortie étant un trou de sortie (115) dans le boîtier (102), qui est sensiblement plus grand qu'un perçage (105) du canon (103).
  7. Silencieux selon l'une quelconque des revendications 1 à 6, dans lequel les trous d'évent (104) du boîtier de silencieux (102) sont distribués radialement et longitudinalement.
  8. Silencieux selon l'une quelconque des revendications 1 à 7, comprenant en outre un diffuseur (204 ; 124) à l'intérieur du boîtier (102).
  9. Silencieux selon la revendication 8, dans lequel le diffuseur est un diffuseur convergent/divergent (204 ; 124) présentant des contours, à la sortie du boîtier pour maximiser l'efficacité de pompage de l'éjecteur.
  10. Silencieux selon l'une quelconque des revendications 1 à 9, dans lequel le silencieux est intégré dans le canon (103) de l'arme à feu.
  11. Silencieux selon l'une quelconque des revendications 1 à 10, dans lequel le boîtier est détachable du canon (103).
  12. Silencieux selon l'une quelconque des revendications 1 à 11, dans lequel le boîtier de silencieux (102) emploie une section transversale non circulaire, en particulier une section ovale.
EP08874639A 2007-09-18 2008-09-17 Suppresseur pour arme à feu Not-in-force EP2191223B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US99428007P 2007-09-18 2007-09-18
PCT/US2008/010806 WO2009151428A2 (fr) 2007-09-17 2008-09-17 Suppresseurs contrôlés de surpression et de purge sans assistance pour bouches d'arme à feu

Publications (2)

Publication Number Publication Date
EP2191223A2 EP2191223A2 (fr) 2010-06-02
EP2191223B1 true EP2191223B1 (fr) 2011-11-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08874639A Not-in-force EP2191223B1 (fr) 2007-09-18 2008-09-17 Suppresseur pour arme à feu

Country Status (4)

Country Link
EP (1) EP2191223B1 (fr)
AT (1) ATE534880T1 (fr)
CA (1) CA2700203A1 (fr)
WO (1) WO2009151428A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9417021B2 (en) 2012-11-15 2016-08-16 Sako Oy Firearm suppressor
US10107581B2 (en) 2016-01-17 2018-10-23 Ascendance International LLC Firearm suppression device
US10746491B2 (en) 2016-01-17 2020-08-18 Ascendance International, LLC Firearm suppression device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8167084B1 (en) 2010-03-01 2012-05-01 Fn Manufacturing, Llc Sound suppressor
WO2014197380A1 (fr) * 2013-06-02 2014-12-11 Richard Christiansen Procédés et systèmes de dissimulation de lumière
EP3227607B1 (fr) * 2014-12-04 2020-01-15 ExxonMobil Research and Engineering Company Buse d'injection de fluide pour réacteurs à lit fluidisé
US10458737B2 (en) 2018-03-06 2019-10-29 Steven H. Schwartzkopf Firearm suppressor including thermal energy absorbing elements manufactured from porous metal
WO2023219527A1 (fr) * 2022-05-11 2023-11-16 Денис Эрнестович ЛЬВОВ Procédé de ralentissement d'un flux de gaz supersonique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH154851A (fr) 1929-07-10 1932-05-31 Miglioramento Armi Soc It Procédé pour la suppression des flammes et fumées sortant des bouches à feu pendant le tir et dispositif pour la mise en oeuvre de ce procédé.
FR825016A (fr) * 1936-11-07 1938-02-22 Perfectionnements aux mitrailleuses et autres armes à feu
US2363563A (en) 1942-11-18 1944-11-28 Neal L Vinson Air-cooled gun barrel
US5761900A (en) * 1995-10-11 1998-06-09 Stage Iii Technologies, L.C. Two-stage mixer ejector suppressor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9417021B2 (en) 2012-11-15 2016-08-16 Sako Oy Firearm suppressor
US10107581B2 (en) 2016-01-17 2018-10-23 Ascendance International LLC Firearm suppression device
US10746491B2 (en) 2016-01-17 2020-08-18 Ascendance International, LLC Firearm suppression device

Also Published As

Publication number Publication date
WO2009151428A3 (fr) 2010-02-18
CA2700203A1 (fr) 2009-12-17
WO2009151428A2 (fr) 2009-12-17
ATE534880T1 (de) 2011-12-15
EP2191223A2 (fr) 2010-06-02

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