Rotary Patents (Class 42/19)
  • Patent number: 10006731
    Abstract: A rotary ammunition magazine for a rifle has a follower that is spring biased and rotates about an axis to move cartridges for feeding to the rifle's chamber. The follower has a rib and/or a projection on a surface facing the cartridges. The rib engages the last cartridge in a stack and directs the force from the follower in the direction of movement of the cartridges within the magazine. The projection engages the extractor groove in the last cartridge to prevent it from moving under inertial forces caused by recoil. The rib engages and prevents the last cartridge from moving down the follower. The projection and rib prevent bolt override malfunctions.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: June 26, 2018
    Assignee: Smith & Wesson Corp.
    Inventors: David S. Findlay, Simon M. Muska
  • Patent number: 9939217
    Abstract: A rotary ammunition magazine for a rifle has a follower that is spring biased and rotates about an axis to move cartridges for feeding to the rifle's chamber. The follower has a surface portion which engages the last cartridge in the stack. The surface portion has one or more characteristics including a transverse orientation angle, a longitudinal orientation angle and an arcuate shape which determine the direction of the force vector and the lengthwise load distribution on the cartridge.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: April 10, 2018
    Assignee: Smith & Wesson Corp.
    Inventor: Simon M. Muska
  • Patent number: 9939216
    Abstract: A rotary ammunition magazine for a rifle has a follower that is spring biased and rotates about an axis to move cartridges for feeding to the rifle's chamber. The follower has a surface portion which engages the last cartridge in the stack. The surface portion has one or more characteristics including a transverse orientation angle, a longitudinal orientation angle and an arcuate shape which determine the direction of the force vector and the lengthwise load distribution on the cartridge.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: April 10, 2018
    Assignee: Smith & Wesson Corp.
    Inventor: Simon M. Muska
  • Patent number: 9927194
    Abstract: A rotary ammunition magazine for a rifle has a follower that is spring biased and rotates about an axis to move cartridges for feeding to the rifle's chamber. The follower has a surface portion which engages the last cartridge in the stack. The surface portion has one or more characteristics including a transverse orientation angle, a longitudinal orientation angle and an arcuate shape which determine the direction of the force vector and the lengthwise load distribution on the cartridge.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: March 27, 2018
    Assignee: Smith & Wesson Corp.
    Inventor: Simon M. Muska
  • Patent number: 9921014
    Abstract: A striker fired semi-automatic pistol or handgun that utilizes a magazine positioned horizontally and in front of the grip. The pistol of the invention includes two recoil springs and two locking lugs positioned on each side of the barrel (1 per side) which has a corresponding set of locking blocks. A sliding stripper rail is utilized to move cartridges from the magazine to the barrel. The grip is detachable and completely customizable, using a small solid tang to connect the grip to the firearm.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: March 20, 2018
    Inventor: John Dees
  • Patent number: 9772153
    Abstract: A rotary ammunition magazine for a rifle has a follower that is spring biased and rotates about an axis to move cartridges for feeding to the rifle's chamber. The follower has a rib and/or a projection on a surface facing the cartridges. The rib engages the last cartridge in a stack and directs the force from the follower in the direction of movement of the cartridges within the magazine. The projection engages the extractor groove in the last cartridge to prevent it from moving under inertial forces caused by recoil. The rib engages and prevents the last cartridge from moving down the follower. The projection and rib prevent bolt override malfunctions.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: September 26, 2017
    Assignee: Smith & Wesson Corp.
    Inventors: David S. Findlay, Simon M. Muska
  • Patent number: 9310159
    Abstract: A firearm with shotgun receiver and stabilizing brace adaptor includes a shotgun receiver assembly that is in communication with a box-style shotgun shell magazine, a shotgun barrel, a tubular magazine, a pump handle, a trigger assembly, a hand grip, and a stabilizing brace adaptor. The stabilizing brace adaptor includes an elongated tubular member having a threaded end, and a grip connector that is interposed between the tubular member and the hand grip.
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: April 12, 2016
    Inventor: Eric Lemoine
  • Patent number: 9228788
    Abstract: A magazine for a firearm is formed by a plurality of sidewalls that define a space for holding ammunition cartridges. An opening between two of the walls provides access to the space. Feed lips are positioned on opposite sides of the opening. The feed lips contact and retain the cartridges within the space. Feed ramp surfaces are positioned on opposite sides of the opening. The feed ramp surfaces are angularly oriented to tilt a cartridge so that it may be fed into the chamber of a barrel as it is pushed out of the opening along the feed ramp surfaces. Guide surfaces are positioned on opposite sides of the opening between the feed lips and the feed ramp surfaces. The guide surfaces guide the cartridge as it disengages from the feed lips and moves up along the feed ramp surfaces.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: January 5, 2016
    Assignee: Smith & Wesson Corp.
    Inventors: John B. Simon, Brett Curry
  • Patent number: 8863638
    Abstract: A cam pin system, includes a cam pin comprising a first cylindrical portion having a first length and a first diameter and a second cylindrical portion concentric with the first cylindrical portion and having a second diameter larger than the first diameter, the second cylindrical portion comprising a through-hole to accommodate the passage of a firing pin. The system includes an end plate detachably connected to the first cylindrical portion of the cam pin, a cylindrical bushing encircling the first cylindrical portion and having an outside diameter approximately equal to the second diameter and a bushing length approximately equal to the first length, and lubricant between the cylindrical bushing and the first cylindrical portion. The cam pin system is configured so that the cylindrical bushing can rotate freely about the first cylindrical portion.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: October 21, 2014
    Inventor: Herbert Wilson Lewis, III
  • Patent number: 8800422
    Abstract: A bolt assembly for a firearm such as an auto-loading or pump action shotgun includes a bolt body, bolt carrier and a bolt head. The bolt head is received within the bolt body and is rotatable within the bolt body to lock the bolt assembly into battery prior to firing the weapon, but does not extend from the bolt body during such rotation. The bolt carrier translates axially relative to the bolt body so as to cause rotation of the bolt head. The extractor for the firearm can be pivotally attached to the bolt body, while the ejector further can be integrated into the bolt assembly for engaging and ejecting a shell or cartridge after firing.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: August 12, 2014
    Assignee: RA Brands, L.L.C.
    Inventors: Vincent Norton, Travis T. Baker
  • Patent number: 7950381
    Abstract: A magazine has a magazine body provided with a rotary clip, and the magazine body comprises an ejector member capable of movement, an ejector elastic member provided on the ejector member and being capable of expansion and contraction, and an engagement indent section capable of being engaged with a magazine catch at the time of loading the magazine into the air gun body, and the air gun body has a magazine ejector structure with the magazine catch that is urged by a catch elastic member to the magazine holding section and capable of engaging with the engagement indent section of the magazine, and a stopper that is capable of pressing part of the ejector member.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: May 31, 2011
    Assignee: Maruzen Company Limited
    Inventor: Tetsuo Maeda
  • Patent number: 7886470
    Abstract: A method of assembling a firearm is provided. The method includes providing a bolt assembly that includes a bolt carrier that includes a cammed slot and a first passage, a bolt member slidably coupled to the bolt carrier and positioned within the first passage, the bolt member includes at least one aperture and a second passage, a piston member slidably coupled to the bolt member and positioned within the second passage, the piston member includes an elongated slot and a third passage, wherein the elongated slot includes a first length, and a cam pin slidably coupled to at least one of the bolt carrier, the bolt member and the piston member, the cam pin includes a fourth passage; and coupling the bolt assembly within a cavity of the firearm such that the bolt assembly is slidably coupled to an upper receiver of the firearm.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: February 15, 2011
    Inventor: Gerald J. Doiron
  • Patent number: 7779571
    Abstract: The present invention can have an adjustable length adapter that attaches to the firearm, and in one embodiment directly to an existing load tube. A mounting assembly and an indexing assembly are further provided. The mounting assembly has a mounting plate with an alignment hole for allowing a shell to pass there through from an aligned tube and into the adapter. The indexing assembly indexes relative the mounting assembly to successively align one of a plurality of tubes with the alignment hole. As one tube fills, the invention can be rotated to index the next tube and tension a rotator that can be positioned generally parallel to the firearm barrel. This process can be repeated until all four tubes are full. Upon emptying of a tube, a pin can be automatically activated to allow the indexing assembly to rotate relative the mounting assembly to align the next successive tube.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: August 24, 2010
    Inventor: Mark Roth
  • Patent number: 7752795
    Abstract: New design for semi-automatic weapon for several tubes cartridges loading system for long guns, wherein an in-between connection steel part fixes the barrel to the receiver. The retention of the cartridges inside the parallel tubes is done by three metallic nails. The springs of the loading tubes push the cartridges into the cylinder inside the gun through three openings made into the front side of the receiver under the barrel. The rotation mechanism of the cylinder is a result of changing the movement of the bolt from horizontal into vertical.
    Type: Grant
    Filed: April 4, 2007
    Date of Patent: July 13, 2010
    Inventor: Juan Francisco Mautone Medvedeo
  • Publication number: 20100154268
    Abstract: New design for semi-automatic weapon for several tubes cartridges loading system for long guns, wherein an in-between connection steel part fixes the barrel to the receiver. The retention of the cartridges inside the parallel tubes is done by three metallic nails. The springs of the loading tubes push the cartridges into the cylinder inside the gun through three openings made into the front side of the receiver under the barrel. The rotation mechanism of the cylinder is a result of changing the movement of the bolt from horizontal into vertical.
    Type: Application
    Filed: April 4, 2007
    Publication date: June 24, 2010
    Inventor: Juan Francisco Mautone Medvedeo
  • Patent number: 7441491
    Abstract: A detachable magazine for storing and delivering ammunition to a firearm having a magazine well. The magazine has a body with a column adapted for insertion into the magazine well. The column has a passage for transmitting ammunition to the firearm. The body includes a drum housing defining a substantially cylindrical chamber communicating with the column passage. A first sprocket element is rotatably received in the chamber and has a serrated periphery, with each serration adapted to receive an ammunition cartridge. A second sprocket element is rotatably received in the chamber, and is concentric with the first sprocket element, having a serrated periphery with each serration adapted to receive an ammunition cartridge. A spring element is connected to at least one of the sprocket elements, and operates to rotatably bias the sprocket elements to transmit cartridges from the drum chamber to the column passage.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: October 28, 2008
    Assignee: Annatac Industries, Incorporated
    Inventor: Michael Raymond Snow
  • Patent number: 7380361
    Abstract: A system and method for providing increased capacity to a firearm having an actuator operably connected to a trigger assembly is disclosed. A magazine for holding a cartridge for use with the firearm includes a plurality of tubes, each tube being defined within the magazine and including an open end. The plurality of tubes being axisymmetric about a longitudinal axis of the magazine. A retainer, mounted about the open end of the tubes and being adaptive to impede release of the cartridge from the open end of the tube, being operably meshed with the actuator wherein the retainer and the actuator cooperate to permit removal of the cartridge from one of the plurality of tubes.
    Type: Grant
    Filed: March 17, 2005
    Date of Patent: June 3, 2008
    Assignee: Snake River Machine, Inc.
    Inventors: Jeffrey Hajjar, Warren Stockton
  • Patent number: 7275342
    Abstract: New design for semi-automatic weapon for several tubes cartridges loading system for long guns, wherein an in-between connection steel part fixes the barrel to the receiver. The retention of the cartridges inside the parallel tubes is done by three metallic nails. The springs of the loading tubes push the cartridges into the cylinder inside the gun through three openings made into the front side of the receiver under the barrel. The rotation mechanism of the cylinder is a result of changing the movement of the bolt from horizontal into vertical.
    Type: Grant
    Filed: May 19, 2004
    Date of Patent: October 2, 2007
    Inventor: Juan Francisco Mautone Medvedeo
  • Patent number: 7194834
    Abstract: A firearm includes a receiver having an opening, at least one cartridge-containing cylinder rotatably disposed within the receiver, and a hammer displaceable between cocked and strike positions. A slide is movably coupled with the receiver so as to be linearly displaceable between a front position and a rear position and displaces the hammer to the cocked position. A rotator is movably coupled with the slide and releasably engages with and rotatably displaces the cylinder when the slide displaces toward the front position and alternatively disengages from the cylinder when the slide displaces toward the rear position. Preferably, each cylinder is rotatably disposed within a chamber of a housing removably disposeable within the receiver cavity and displaceable through the receiver opening. Most preferably, at least one cylinder has chambers for receiving cartridges of a first size and another cylinder has chambers for receiving cartridges of a second, different size.
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: March 27, 2007
    Inventor: Patrick Falenwolfe
  • Patent number: 6877265
    Abstract: A system and method for providing increased capacity to a firearm having an actuator operably connected to a trigger assembly is disclosed. A magazine for holding a cartridge for use with the firearm includes a plurality of tubes, each tube being defined within the magazine and including an open end. The plurality of tubes being axisymmetric about a longitudinal axis of the magazine. A retainer, mounted about the open end of the tubes and being adaptive to impede release of the cartridge from the open end of the tube, being operably meshed with the actuator wherein the retainer and the actuator cooperate to permit removal of the cartridge from one of the plurality of tubes.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: April 12, 2005
    Assignee: Snake River Machine, Inc.
    Inventors: Jeffrey Hajjar, Warren Stockton
  • Patent number: 6609319
    Abstract: New and improved bolt assemblies for M4/M16 firearms capable of firing a remarkably greater number of rounds than previously available M4/M16 firearms are, disclosed that have right and left compression springs that are parallel to each other, straddle the firing pin bore and are retained in partial bores that have proximal and distal ramps descending from their open ends. Additionally, these bolt assemblies advantageously (A) have the extractor pivot pin receiving lug is positioned at the longitudinal center of the mass of the extractor, (B) walls of bolt lugs on the firearm bolt are angled tangent to full radius fillets joining adjacent bolt lugs, (C) the extractor contains a ceramic ball and a captive rubber spring to bias such ball against the extractor pivot pin to retain it in the receiving lug and (D) lugs on the barrel extension are angled tangent to substantial radius fillets joining them.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: August 26, 2003
    Assignee: Knights Armament Company
    Inventor: Douglas D. Olson
  • Patent number: 6578463
    Abstract: Miniature machine gun in which all components are housed within a cylindrical tube, the barrel being disposed axially of the tube and the magazine surrounding the barrel. Barrel and magazine is a removable unit which may be replaced by an identical unit where rapid reloading is desired; has no stock, sights or other appendages and is intended to be operated from the hip of the user.
    Type: Grant
    Filed: March 22, 1967
    Date of Patent: June 17, 2003
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Hubert M. Ross, Jr.
  • Patent number: 6032395
    Abstract: A pump action shotgun that has been designed to accept a shotgun shell magazine that can be quickly and easily attached or removed. An aperture is formed in the bottom surface of the receiver forwardly of a trigger housing assembly aperture. The top end of the magazine has a feed lip assembly that restricts the upward travel of the shotgun shells prior to their being transported to the rear end of the gun barrel by the bolt assembly as it travels forwardly. A spring loaded tang extends downwardly from the front bottom surface of the bolt assembly and travels through the feed lip assembly where it engages the rear end of the upper most shotgun shells and carries it forwardly to the rear end of the gun barrel. A bolt slide that is detachably secured to the bottom surface of the bolt assembly has a concave bottom surface that allows it to travel forwardly and rearwardly over the top of the feed lip assembly of the shotgun shell magazine.
    Type: Grant
    Filed: June 26, 1998
    Date of Patent: March 7, 2000
    Inventors: James K Bentley, Willard H Crawford
  • Patent number: 5771620
    Abstract: A pump action shotgun that has been designed to accept a shotgun shell magazine that can be quickly and easily attached or removed. An aperture is formed in the bottom surface of the receiver forwardly of a trigger housing assembly aperture. The top end of the magazine has a feed lip assembly that restricts the upward travel of the shotgun shells prior to their being transported to the rear end of the gun barrel by the bolt assembly as it travels forwardly. A spring loaded tang extends downwardly from the front bottom surface of the bolt assembly and travels through the feed lip assembly where it engages the rear end of the upper most shotgun shells and carries it forwardly to the rear end of the gun barrel. A bolt slide that is detachably secured the bottom surface of the bolt assembly has a concave bottom surface that allows it to travel forwardly and rearwardly over the top of the feed lip assembly of the shotgun shell magazine.
    Type: Grant
    Filed: November 20, 1995
    Date of Patent: June 30, 1998
    Inventors: Willard H. Crawford, James K. Bentley
  • Patent number: 5335579
    Abstract: An improved magazine for fragile projectiles such as pellets or paint balls, wherein the front end of a rotating drive member is formed with elongated fingers to form individual chambers to feed the projectiles one by one out of the magazine synchronously with the firing of the gun. An escapement member operated by some portion of the gun permits rotation of the carrier within the housing of the magazine, one projectile distance at time, to cooperate with the elongated fingers and an exit ramp formed in the front end cap of the magazine. The projectiles do not contact each other radially while in the magazine.
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: August 9, 1994
    Assignee: Calico Light Weapon Systems
    Inventor: James C. David
  • Patent number: 5119575
    Abstract: A rotary feed magazine for a pump action shotgun has circumferentially arranged chambers loaded with shells, the magazine being releasably attached to the shotgun such that the chambers can be successively rotated into alignment with a receiver chamber by a slide action cam actuator mechanism which takes the place of the conventional pump action mechanism of the gun; and when each magazine chamber is aligned with the receiver chamber the slide action mechanism will control successive advancement or feeding of the shells from the magazine chamber under the urging of a plunger. A cam is activated in response to depletion of the shells in each chamber to move into the path of movement of the cam actuated mechanism whereby to impart rotation to the magazine in order to advance the next loaded chamber in succession into alignment with the receiver chamber.
    Type: Grant
    Filed: October 22, 1990
    Date of Patent: June 9, 1992
    Inventor: Michael S. Gajdica
  • Patent number: 4619063
    Abstract: A pistol that has a barrel and bolt is provided and consists of a mechanism for revolving a cylindrical magazine that has a plurality of radial chambers which hold a plurality of cartridges within a cylindrical bore of a handle. Each chamber in turn will be in alignment with the barrel and the cartridges in turn will be in position to be pushed by the bolt to be fired from the barrel.
    Type: Grant
    Filed: January 23, 1985
    Date of Patent: October 28, 1986
    Inventors: Charles Hill, George Spector
  • Patent number: 4471549
    Abstract: A self-loading firearm for firing rubber bullets and the like has an actuating mechanism comprising a toggle linkage which is straightened on operation of the trigger against its spring bias. Initial straightening of the toggle linkage moves the breech block forward to locate a round of ammunition in a short socket at the chamber end of the barrel. As the toggle linkage moves over center it locks the breech block forward and displaces a sear to release the firing pin. The round is fired with its case virtually unsupported. On release of the trigger the toggle mechanism is bent so withdrawing the breech block and the spent round which is automatically ejected. The firing pin is simultaneously re-cocked. Rotary and vertical stacking rechargeable magazines are described, from which a fresh round is automatically fed to the breech on ejection of a spent round.
    Type: Grant
    Filed: March 15, 1982
    Date of Patent: September 18, 1984
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Norman T. Brint, Jack W. Comley
  • Patent number: 4453329
    Abstract: A firearm especially for firing large calibre rounds such as rubber bullets and having a rotary magazine which is rechargeable at any stage of depletion. A loading arm serves to guide rounds through an inlet opening in the magazine, in such a way that they are received into corresponding locations in a rotating carrier, and the carrier rotates forward one position with each additional round. Until the penultimate round, the guide means is locked to the magazine body. In this position, it obstructs further movement of the first-inserted round and thus prevents insertion of the final round. Mechanism is described by which, on insertion of the final round the guide means automatically unlocks from the magazine body and locks to the rotating carrier. In this condition it serves to keep the first inserted round locked in the magazine as it completes a full rotation to come opposite the inlet opening once more.
    Type: Grant
    Filed: March 15, 1982
    Date of Patent: June 12, 1984
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Norman T. Brint, Jack W. Comley