Having Pressure-control Means Patents (Class 89/1.703)
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Patent number: 11287208Abstract: The invention relates to a gun provided with recoil brake (14) and a method for improving the efficiency of the same. During the method a portion of the gunpowder gases burnt by means of the oxidant present in the barrel (2) of the gun but still containing inflammable material is introduced as the primary medium from the barrel (2) of the gun into the nozzle (9) of an ejector and the secondary medium is thus pumped in for forming a pre-mixture which is introduced into the combustion chamber of a pulsating reactive drive mechanism (10) acting in a direction opposite to the direction of the shot. This mixture is further burnt by means of the medium containing oxidant present in the drive mechanism (10), the combustion product is led out through the blow pipe (18) and the flow-back taking place during combustion is avoided by means of a valve.Type: GrantFiled: March 22, 2019Date of Patent: March 29, 2022Inventors: Tibor Feher, Ferenc Apolczer
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Patent number: 9163892Abstract: A muzzle brake mounts to the barrel of a gun and reduces the recoil when the gun is fired. The muzzle brake comprises a supersonic nozzle including an expansion chamber configured to accelerate the propellant gases exiting the barrel of the gun and a reverser plate to at least partially reverse the flow of the propellant gases to reduce or mitigate recoil.Type: GrantFiled: December 2, 2014Date of Patent: October 20, 2015Inventor: David C. Buboltz
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Patent number: 8807004Abstract: This disclosure relates to launchers and launcher systems for discharging or launching payloads to downrange targets, and associated methods of using such launcher systems. This disclosure further provides methods for attenuating or reducing felt recoil such that relatively large weight payloads can be launched while the launcher is handheld or mounted in any manner. Examples of payloads that can be deployed with the disclosed launcher apparatus include chemical, biological, pyrotechnic, marker, tracer, signaling, non-lethal, anti-personnel, explosive, smoke, and similar payloads.Type: GrantFiled: August 3, 2012Date of Patent: August 19, 2014Inventor: James Y. Menefee, III
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Patent number: 8322264Abstract: A pressure release mechanism for a sonic rarefaction wave-type low-recoil gun system employing controlled plastic venting that exhibits adiabatic shear banding to effect a delayed pressure release.Type: GrantFiled: February 13, 2008Date of Patent: December 4, 2012Assignee: The United States of America as Represented by the Secretary of the ArmyInventor: Brian James Van De Wal
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Patent number: 7895787Abstract: A choke for use with a shotgun is provided. In accordance with one embodiment the choke has a body that defines a bore with a longitudinal axis therethrough. The body is configured for engagement with a shotgun, and the bore is positioned for traversal of a wad and shot therethrough and out of an end of the bore. The body has a circumference, an inner surface, and outer surface. The body defines at least one port for venting gas from the bore that extends from the inner surface to the outer surface. The shape of the port at the inner surface is asymmetrical.Type: GrantFiled: January 11, 2008Date of Patent: March 1, 2011Inventor: Mark L. Andry
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Publication number: 20100275763Abstract: A nozzle for a weapon including a launcher which constitutes a guide for a projectile or missile. The nozzle includes a wall, a first opening connected to the launcher and a second opening. The area of the first opening is smaller than the area of the second opening. The nozzle a pressure reducer for reducing a pressure of gases from the projectile inside and behind the nozzle when firing the weapon. A circumferential element is arranged at the first opening of the nozzle. An opening area of the circumferential element is less than the area of the first opening of the nozzle.Type: ApplicationFiled: December 21, 2007Publication date: November 4, 2010Applicant: SAAB ABInventors: Andreas Malmlof, Mili Dugalic
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Patent number: 7748306Abstract: A method for releasably attaching a compensator assembly adjacent a muzzle end of a barrel of a firearm. The compensator assembly includes an attachment means on its rear end. The barrel has a firing axis and includes a threaded end opposite the muzzle end and defines a recess formed adjacent the muzzle end. The firearm itself has a frame defining a threaded aperture. The method includes moving the attachment means into engagement with the recess; tensioning the attachment means within the recess in a direction substantially parallel to the firing axis; inserting a mating tool into the muzzle end of the barrel; rotating the barrel via the mating tool, thereby causing the threaded end of the barrel to threadedly engage with the threaded aperture; and halting the rotation of the barrel via the mating tool when a predetermined torque is achieved.Type: GrantFiled: October 31, 2007Date of Patent: July 6, 2010Assignee: Smith & Wesson Corp.Inventors: Brett Curry, Richard Mikuta
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Publication number: 20090031912Abstract: A housing (1; 100, 104, 102) of a cartridge for a device for firing a projectile has separate first and second chambers (10, 12; 106, 114), each of which contains a respective charge (34, 36; 108, 110, 116, 120) of propellant material. Gas produced by the detonation of one of the charges exits the first chamber to propel the projectile, whilst gas from the detonation of the second charge exist rearwardly from the device so as to counteract recoil. A one way valve may also be provided to help to achieve a high pressure difference between the chambers, where the cartridge has a common igniter assembly.Type: ApplicationFiled: October 27, 2006Publication date: February 5, 2009Applicant: RICHMOND EEI LIMITEDInventor: Robert Jackson Gilbert
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Patent number: 7353739Abstract: An arrangement for a weapon including a countermass for reducing the pressure around the weapon. The countermass is enclosed in a countermass container that can be opened at both ends. The invention aims to bring about a symmetrical opening with favorable recoil in a better way than in previous constructions. This is achieved by the countermass including elements that can bind and retain the liquid symmetrically in a desired geometry over the cross section of the barrel and the cross section of any following expansion part.Type: GrantFiled: June 2, 2004Date of Patent: April 8, 2008Assignee: SAAB ABInventors: Lars Ax, Eje Lantz, Kent Norgren, Rolf Pettersson
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Patent number: 7191693Abstract: An arrangement for a weapon including a countermass for reducing the pressure around the weapon. The countermass is enclosed in a countermass container with an openable cover provided with break indications. The arrangement brings about a symmetrical opening operation with favorable recoil in a better way than in previous constructions. This is achieved by the introduction of a guiding folding support arranged adjacent to the openable cover on the inside of the cover relative to the countermass container.Type: GrantFiled: June 2, 2004Date of Patent: March 20, 2007Assignee: Saab ABInventors: Lars Ax, Eje Lantz, Kent Norgren, Rolf Pettersson
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Patent number: 6964220Abstract: A floating barrel gun design, a design in which a propellant gas discharge is used to counterbalance the recoil force of the gun, has been improved to include a novel automatic mechanical mechanism which allows the floating or inner barrel to be held stationary within the gun while the gas is discharged and after the discharge is complete, the barrel is released to return to its pre-actuation position. The discharge of gas is also made safer by an automatic mechanical mechanism for venting the accumulated gas, and this mechanism is activated as the projectile leaves the gun. The mechanism requires that the gas be discharged into the interior of the gun and the recoil-countering gas streams be directed toward a rearward moving breech block.Type: GrantFiled: May 10, 2004Date of Patent: November 15, 2005Inventor: Walter M Lavin
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Patent number: 6460446Abstract: A low recoil and low bore heat gun system provides a delayed pressure release mechanism for fired propellant charges in the rear gun barrel section. The delayed pressure release of the exhaust gases causes a sonic rarefaction wave along the length of the barrel bore to arrive at the exist end of the gun barrel at a predetermined time, generally coincident with the fired projectile.Type: GrantFiled: August 2, 2000Date of Patent: October 8, 2002Assignee: The United States of America as represented by the Secretary of the ArmyInventor: Eric L. Kathe