Opened By Spring-actuated Means Patents (Class 124/76)
  • Patent number: 5954043
    Abstract: A weapon comprising a combination lethal weapon and less lethal gas-powered weapon mounted below the lethal weapon. The less lethal weapon which fires projectiles is independently operable when dismounted and included bolt, gas supply and magazine features.
    Type: Grant
    Filed: June 19, 1997
    Date of Patent: September 21, 1999
    Assignee: Universal Propulsion Company, Inc.
    Inventors: Wayne R. Mayville, Thomas E. Wergen
  • Patent number: 5924413
    Abstract: An air compressed gun (10) is provided having a stock (11), a barrel (12), a trigger (13) and a manual air pump (14). The gun also has a control valve (200) which controls the flow of compressed air into a magazine (202). The control valve includes an external tube (204), an internal tube (205) reciprocally mounted within the external tube, and a plunger (206) reciprocally mounted within the internal tube.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: July 20, 1999
    Assignee: Johnson Research & Development Company, Inc.
    Inventors: Lonnie G. Johnson, John T. Applewhite
  • Patent number: 5908024
    Abstract: The breech block for pneumatic shooting device is utilized in weapons for expelling solid-state bodies or marking pellets. It has a simplified and easy for maintenance construction ensuring long term exploitation and minimum fluid consumption for one shot. The breech block comprises a housing 1 in which a barrel 2 is mounted. A step-shaped cylindrical bore is formed in the housing 1, and a piston 4 having two parts 9 and 10 of different diameters is placed in the bore. The step-shaped bore in the housing 1 has a portion 13 which diameter is greater than the diameter of the rear part 10 of the piston 4. The piston 4 is provided with an axial passage 14, the rear end of which being connected to radial openings 8 formed at the rear part 10 of the piston 4.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: June 1, 1999
    Assignee: Bulforce Engineering Ltd.
    Inventor: Victor S. Staev
  • Patent number: 5813392
    Abstract: A compressed gas gun is disclosed. A slidable breech seal is employed which is operable to seal a breech opening formed in the frame of the gun and lock the gun in a position ready for discharge. Upon discharge, a hammer strikes the breech seal causing a valve to expel compressed gas and discharge the gun. The beech seal is then slid to a second position which serves to cock the gun, expose the breech opening for subsequent loading, and to set a safety device against subsequent discharge. Once cocked, the breech seal is slid to a first position, again sealing said breech opening.
    Type: Grant
    Filed: January 3, 1998
    Date of Patent: September 29, 1998
    Inventor: John A. McCaslin
  • Patent number: 5791328
    Abstract: A valve, especially for use in a paintball gun which includes a pressure chamber bore for receiving gas from a source, an exhaust bore which leads to a barrel, and a valve chamber bore between the pressure chamber bore and exhaust bore. The valve includes a body mounted in the valve chamber bore with a flow path between the pressure chamber and exhaust bores, and a cupseal seat on the upstream side of the flow path. A valve stem passes through a portion of the flow path and is slidably supported by a support nose, and presents an actuation surface at one end, and supports a cupseal to mate with the seat at the other end. The cupseal has radial guide legs to closely and slidably contact the pressure chamber bore to aid alignment. The cupseal will normally be held against the seat by gas pressure and/or a spring; to open the valve, the gun may be provided with a hammer which is released to strike the actuation surface of the valve stem, to unseat the cupseal and allow gas to flow into the barrel.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: August 11, 1998
    Inventor: Aaron K. Alexander
  • Patent number: 5778868
    Abstract: According to the invention a firing mechanism is provided for use in semi-automatic guns of the type which use compressed gas to fire projectiles from a gun barrel. The mechanism has an inlet valve to receive the gas and an automatic outlet valve connected pneumatically to the inlet valve. A compound valve element is biased to move longitudinally from a first position where it is ready for firing to a second position. When the mechanism is actuated the valve element moves to the second position and gas flows from the inlet valve into a gas chamber in the outlet valve. When the gas reaches a selected pressure the valve element is driven back towards the first position before the gas is free to fire a projectile. This ensures that sufficient force is available to recock the gun and that the gas pressure available to drive the projectile is generally constant thereby controlling the muzzle velocity of the projectile.
    Type: Grant
    Filed: February 3, 1997
    Date of Patent: July 14, 1998
    Assignee: K.K.M. Inc.
    Inventor: Charles G. Shepherd
  • Patent number: 5722383
    Abstract: An ammunition feed mechanism for an automatic or semiautomatic weapon which includes a mechanism for retarding the cyclic feeding of ammunition into the chamber of the weapon. The mechanism for retarding the cyclic feeding of ammunition includes an impeder which engages the bolt of the weapon. The ammunition feed mechanism also includes a magazine having a ramped bottom which directs ammunition projectiles to an exit therein where the ammunition projectiles are fed into the chamber of the weapon. The magazine includes a plurality of curved projections in the bottom which define a plurality of spaces into which the ammunition projectiles are received. The plurality of curved projections also guide the ammunition projectiles through the exit.
    Type: Grant
    Filed: December 1, 1995
    Date of Patent: March 3, 1998
    Assignee: Tippmann Pneumatics, Inc.
    Inventors: Dennis J. Tippmann, Sr., Dennis J. Tippmann, Jr.
  • Patent number: 5711286
    Abstract: A gas-powered pistol has a frame with a forwardly opening barrel passage that extends through much of the length of a barrel portion of the frame wherein a reciprocally movable barrel is housed. Side-by-side magazine and gas supply passages extend from the barrel passage through a grip portion of the frame for receiving therein a reloadable magazine and a replaceable pressurized gas cylinder. The frame is formed from metal that is die-cast about a pre-machined metal insert located at the juncture of the barrel and gas supply passages. The insert provides an inlet into which a seal piercing assembly is threaded for receiving pressurized gas from the gas cylinder, and an outlet into which a valve assembly is threaded that slidably supports the breech end of the barrel. The barrel carries a hammer mass that is engaged by a trigger-mounted sear for moving the barrel forwardly in opposition to the action of a firing spring when the trigger is pulled.
    Type: Grant
    Filed: May 31, 1996
    Date of Patent: January 27, 1998
    Assignee: ANICS Corp.
    Inventors: Aleksei Lvovich Petrosyan, Aleksei Borisovich Shipachov, Andrei Borisovich Kapustin
  • Patent number: 5704342
    Abstract: A compressed gas powered gun includes an arrangement that meters the amount of air flow exiting through an outlet port of the gun that tends to restrict the velocity of the exiting air to be less than the speed of sound during normal operation. In addition, the exit velocity of the projectile is less sensitive to pressure variations and may be more closely controlled so that shot to shot consistency of the gun is increased. The firing rate of the gun can also be modified.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: January 6, 1998
    Assignee: Thomas G. Kotsiopoulos
    Inventors: Gary E. Gibson, Thomas G. Kotsiopoulos
  • Patent number: 5664552
    Abstract: A gas pressure accumulating and supplying device for use in model guns, which comprises a pressure accumulating chamber provided in a case member, a gas injecting opening provided on a bottom portion of the case member, a gas introducing structure extending from the gas injecting opening into the pressure accumulating chamber, a gas discharging passage extending from the pressure accumulating chamber, and a control valve structure provided in the gas discharging passage for controlling supply of gas pressure from the pressure accumulating chamber.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: September 9, 1997
    Assignee: Western Arms
    Inventor: Keiichi Kunimoto
  • Patent number: 5634456
    Abstract: A gun suitable for firing paintballs or pellets using compressed gas having an elongate breech section with a longitudinal passageway formed therein and a handle and barrel connected thereto. A hammer is slidably mounted in the passageway and a spring biases the hammer to a forward, firing position. A gas valve system is arranged in the passageway and is connectible to a source of compressed gas. A trigger includes a sear engaging member slidable in a cavity formed in the trigger. A spring biases this member to a rearward position. A sear with a downwardly extending hook is pivotally mounted on a sear pin. A further spring biases the sear so as to pivot the rear end upwardly into engagement with a flange formed on the bolt of the gun. Preferably the hammer and bolt are rigidly connected together by means of two links positioned on opposite sides of the hammer and bolt to which they are both connected.
    Type: Grant
    Filed: October 23, 1995
    Date of Patent: June 3, 1997
    Assignee: Daisy Manufacturing Company, Inc.
    Inventor: Aldo Perrone
  • Patent number: 5622160
    Abstract: Improvements in gas-powered guns of the revolver type. The gun includes a barrel (10), a revolving projectile loader (11) by way of a revolver drum tiltable to one side into a loading position, a rearsight holder (14) bearing a sight (15) which is adjustable positioned by a screw (16), a striking hammer (17) rotationally actuated by a trigger (18) and a grip frame (19) housing a compressed-gas cartridge (20) whose nozzle leans against a seal (21). According to the improvements, a casing (24) moulded on the barrel (10) has an upper expansion (24a) which positionally secures a portion of the rear sight holder (14). The revolving projectile loader (11) is constituted by two pieces obtained by moulding, a first piece (29) comprising a series of tubular elements (30) provided to accommodate the projectiles and to transfer them to the barrel (10), and a second piece (32) constituting a casing and receiving in its inside the former one in a plug-in engagement.
    Type: Grant
    Filed: September 27, 1995
    Date of Patent: April 22, 1997
    Assignee: Industrias el Gamo, S.A.
    Inventor: Francisco Casas Salva
  • Patent number: 5586545
    Abstract: Two embodiments of a compressed gas gun are disclosed. In the first embodiment, a slidable barrel supported by two barrel guides is employed. A thermoplastic compression sleeve provides a bearing for the slidable barrel, which impacts a valve assembly upon actuation of a trigger mechanism. The impact momentarily opens the valve thereby releasing compressed gas and expelling a projectile. An anti-rebound lock prevents rebound of the barrel and subsequent discharge of gas. In the second embodiment, a slidable bolt assembly serve the function of impacting the valve. The barrel is rigidly attached to the frame of the gun and a spring forces the slidable bolt assembly against the valve. A seal is provided between the slidable bolt assembly and the barrel for allowing slidable movement and preventing the loss of compressed gas.
    Type: Grant
    Filed: October 2, 1995
    Date of Patent: December 24, 1996
    Inventor: John A. McCaslin
  • Patent number: 5572982
    Abstract: A bolt having an opening formed therethrough is slidably located in the bore of the gun. The bolt is held in a rear position by a sear with the bolt opening closed by a valve which extends into the bolt opening and engages a rear facing bolt seat. A passageway extends into the bolt opening for allowing pressurized gas to flow into the bolt opening. A trigger mechanism releases the bolt for allowing the bolt to be moved forward for allowing the valve and seat to separate for allowing the gas to flow through the bolt opening for forcing a ball from the rear end of the barrel out of the gun. The valve and bolt are constructed to allow initially a small amount of gas to flow through the gas outlet of the bolt and then to allow the full force of the gas to flow through the gas outlet. This causes the ball to start rolling before the full force of the air impacts the ball thereby minimizing breakage of the ball in the gun barrel.
    Type: Grant
    Filed: September 21, 1995
    Date of Patent: November 12, 1996
    Inventor: Robert A. Williams
  • Patent number: 5515838
    Abstract: Disclosed is a paint ball gun having a passage for porting pressurized gas to a ball projectile, a primary gas chamber, and a primary valve for controllably flowing pressurized gas from the primary chamber to the passage. The improved gun has a secondary gas chamber, an aperture connecting the passage and the secondary chamber and a spool-type secondary valve closing the aperture when the primary valve is in the intermediate position. The secondary chamber and secondary valve prevent pressurized gas from flowing into the hammer chamber (for re-cocking) until the ball is well on its way out of the barrel. Higher, more consistent ball velocity results. The new gun, of modular construction, also has a novel arrangement for controlling release of the hammer and "catching" such hammer as it is driven into its re-cocked position.
    Type: Grant
    Filed: March 24, 1994
    Date of Patent: May 14, 1996
    Assignee: Donald R. Mainland
    Inventor: Donald L. Anderson
  • Patent number: 5509399
    Abstract: A semi-automatic fluid powered gun includes an elongated barrel having opposed front and rear open ends, and a projectile storage clip for storing a plurality of projectiles outside of the barrel and for sequentially positioning each projectile in line with the barrel adjacent the rear end. A transfer tube is supported to the rear of and in line with the barrel and is movable between a forward position in which it moves the positioned projectile into the barrel and prevents the other stored projectiles from being positioned in line with the barrel, and a rear position in which the transfer tube permits the next stored projectile to be positioned in line with the barrel. An elongated cylinder is positioned to the rear of and in line with the barrel and includes opposed front and rear open ends, and the transfer tube is received in the front end of the cylinder to provide fluid communication between the cylinder and the barrel when the transfer tube is in the forward position.
    Type: Grant
    Filed: January 12, 1995
    Date of Patent: April 23, 1996
    Inventor: Keith A. Poor
  • Patent number: 5505188
    Abstract: A bolt having an opening formed therethrough is slidably located in the bore of the gun. The bolt is held in a rear position by a sear with the bolt opening closed by a valve which extends into the bolt opening and engages a rear facing bolt seat. A passageway extends into the bolt opening by way of a valve for allowing pressurized gas to flow into the bolt opening. A trigger mechanism releases the bolt for allowing the bolt to be moved forward for allowing the valve and seat to separate for allowing the gas to flow through the bolt opening for forcing a ball from the rear end of the barrel out of the gun. Forward movement of the bolt is stopped by a lock member located in an aperture formed through the wall of the bolt which is forced outward into a slot of the gun body when the lock member reaches the slot. A cock valve located in a cock valve chamber releases gas from the cock valve chamber to force the lock member back into the bolt aperture and to force the bolt back to the rearward position.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: April 9, 1996
    Inventor: Robert A. Williams
  • Patent number: 5497758
    Abstract: A compressed gas powered gun having a spring biased slider reciprocally moveable within the breech of the gun; the slider being released by a trigger from a cocked position to a firing position. The slider includes a hammer provided with a roller having a beveled contact surface for engaging a vertically oriented valve stem to release compressed gas from a gas source into the barrel and breech of the gun for propelling a projectile and for recocking the slider, respectively. A gas control system includes an annular partition seal moveable with respect to the slider to create a partition between breech and barrel and a pair of gas release valves communicating respectively with barrel and breech to control pressure within the barrel and breech, hence controlling projectile velocity and recocking force.
    Type: Grant
    Filed: June 23, 1994
    Date of Patent: March 12, 1996
    Inventors: Jerrold M. Dobbins, Joseph M. Dobbins
  • Patent number: 5462042
    Abstract: A CO.sub.2 powered paint ball gun is provided operative to three times expand CO.sub.2 gas as it is extracted from a container of liquid CO.sub.2 and ducted to a position behind a paint ball disposed in the barrel of said gun. The gun includes three adjustments by which the velocity of the discharge of a paint ball from the barrel of the gun may be adjusted and includes a bolt action which is gas operated. Furthermore, the gun components may be readily disassembled for cleaning and/or repair and replacement and the initial expansion of CO.sub.2 gas under pressure occurs in a passage passing through the hand grip of the gun in a manner such that the chilled first expanded CO.sub.2 gas may be warmed by the heat of the user's hand grasping the hand grip.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: October 31, 1995
    Inventor: Andrew J. Greenwell
  • Patent number: 5383442
    Abstract: A compressed powered gun has a receiver with a compressed gas source fastened to one end thereof and an elongated barrel through which projectiles may be sequentially discharged fastened to the other end thereof, A clamp is formed as an integral portion of the receiver and adapted to encircle and be tightened about the barrel near one barrel end to connect the barrel to the receiver, A projectile supply hopper containing a plurality of projectiles supplies projectiles sequentially to the receiver by way of a feed tube which is formed as an integral portion of the receiver, A clamp formed as an integral portion of the feed tube is arranged to encircle and be tightened about a portion of the projectile supply hopper thereby securing the projectile supply hopper to the feed tube portion of the receiver.
    Type: Grant
    Filed: June 10, 1992
    Date of Patent: January 24, 1995
    Inventor: Dennis J. Tippmann
  • Patent number: 5363834
    Abstract: A gun having a first mode of operation for propelling the projectile by compressed gas contained within a cartridge and a second mode of operation for propelling the projectile by air compressed by a self contained pumping mechanism. A switching system is provided for switching between the first and second modes. The switching system includes a valve having a first position corresponding to the first mode of operation and a second position corresponding to the second mode of operation. The first position allows compressed gas from the cartridge to propel the projectile and the second position prevents compressed gas from the cartridge from propelling the projectile and allows the projectile to be propelled by compressed air from the pumping mechanism. A switch member is provided for positioning the valve in the first and second positions. The switch member is capable of being actuated by the gun operator to switch the gun between the first and second modes.
    Type: Grant
    Filed: March 30, 1993
    Date of Patent: November 15, 1994
    Assignee: Daisy Manufacturing Company, Inc.
    Inventor: William R. Stuchlik
  • Patent number: 5349939
    Abstract: A gun for firing pellets using compressed gas having a breech, a hammer mechanism slidably mounted in the breech, which mechanism includes a hammer and a spring mounted to drive the hammer forwards when the gun is fired, and a trigger pivotally connected to the breech. A sear device having a front and a rear end is mounted on a sear pin in the breech. A sear spring biases the sear device so that the front end thereof pivots downwardly after the hammer is released. This sear device includes a sear detent slidably mounted in the front end. A small spring biases the sear detent to move to a forward position in order to be engageable by the trigger. The valve mechanism of the gun is mounted by a pin about which extends an elastomeric bumper. This bumper reduces shock loading on a top frame of the gun.
    Type: Grant
    Filed: August 13, 1992
    Date of Patent: September 27, 1994
    Assignee: Brass Eagle Inc.
    Inventor: Aldo Perrone
  • Patent number: 5349938
    Abstract: A semiautomatic pneumatic gun is provided incorporating a reciprocatable striker-barrel which performs the normal functions of a barrel and a striker, sliding during firing from a cocked position in response to the urging of a striker power spring to impact upon a normally closed valve, which impact releases compressed gas for propelling a projectile from the gun and for recocking the gun. A slidable bolt serves to transfer the impact of the striker-barrel to the valve, and functions as a piston moving in a cylindrical recocking chamber in response to the urging of gas released by the valve to move the striker-barrel back to the cocked position.
    Type: Grant
    Filed: April 22, 1993
    Date of Patent: September 27, 1994
    Inventor: Kenneth R. Farrell
  • Patent number: 5230324
    Abstract: A weapon system which utilizes pressurized gas to propel a projectile from a barrel and which utilizes a shearable diaphragm member to permit the pressure of gas in the weapon to increase to a selected point before the gas propels the projectile from the barrel.
    Type: Grant
    Filed: October 4, 1991
    Date of Patent: July 27, 1993
    Inventors: Arden D. Van Horssen, Charles A. Van Horssen
  • Patent number: 5224465
    Abstract: An air gun includes a valve assembly with a sliding baffle for limiting the maximum velocity and energy which can be provided by the gun. The valve assembly includes a valve body which has a pressure reservoir, an air passage, and a valve seat between the pressure reservoir and the air passage. A valve normally closes the valve seat to hold pressure in the pressure reservoir and is moved away from the valve seat when the gun is fired. A bleed opening in the valve body connects the air passage to the outside of the valve body, and an exhaust opening connects the air passage to the barrel of the gun. The baffle is slidably mounted in the air passage and is movable between a first position in which the bleed opening is restricted and the exhaust opening is unobstructed and a second position is which the exhaust opening is restricted and the bleed opening is substantially unobstructed.
    Type: Grant
    Filed: March 6, 1992
    Date of Patent: July 6, 1993
    Assignee: Crosman Corporation
    Inventor: Keith L. Milliman
  • Patent number: 5165383
    Abstract: A gun includes a frame and a pivoting barrel assembly which is releasably latched in a firing position by a pair of flexible and resilient latches on the barrel assembly which engage shoulders on the frame. A trigger is slidably mounted on the frame for movement between a rest position and a firing position. A projectile loader is mounted on the frame at the breech end of the barrel assembly for movement between a loading position and a firing position. The loader is provided with an opening which is aligned with a magazine in the frame when the loader is in the loading position and is aligned with the bore of the barrel assembly when the loader is in the firing position. A camming ramp on the trigger is engageable with the loader for moving the loader between the loading and firing positions as the trigger moves between the rest and firing positions.
    Type: Grant
    Filed: December 26, 1990
    Date of Patent: November 24, 1992
    Assignee: Crosman Corporation
    Inventors: Gary F. Ebert, Keith L. Milliman, Thomas Hughes
  • Patent number: 5154157
    Abstract: A compressed air gun comprises a plastic casing, in which a low-pressure cylinder is arranged beneath the gun barrel and a high-pressure cylinder is arranged behind the barrel, with a pressure release system between the cylinders. Two pistons are contained within the respective cylinders and are connected to a cocking lever each by a separate hinge rod. A series of catches and releases requires all operative steps to be completed in the correct sequence before firing to prevent overloading of the air pressure system and also to prevent accidents.
    Type: Grant
    Filed: October 19, 1989
    Date of Patent: October 13, 1992
    Assignee: Sony Corporation
    Inventor: Peter Goepfert
  • Patent number: 5063905
    Abstract: A pneumatic gun incorporating a striker (50) moving in response to the urging of a compressed power spring (77) from a cocked position in a striker chamber (46) to impact on a primary valve assembly (80) and thereby effect the release of compressed gas for propelling a projectile from the gun and for recocking the striker (50) is disclosed. The primary valve assembly (80) incorporates a single full-pressure main valve (87) for regulating the release of all compressed gas, and a unidirectional low pressure secondary valve (88) for providing a portion of the compressed gas released by the main valve to the striker chamber (46) for urging the striker (50) to move back to the cooked position.
    Type: Grant
    Filed: September 6, 1990
    Date of Patent: November 12, 1991
    Inventor: Kenneth R. Farrell
  • Patent number: 5054464
    Abstract: A rapid fire gas powered projectile gun is comprised of a projectile holder; a barrel connected to the projectile holder having a diameter smaller than the diameter of the projectile holder but at least as large as the diameter of a projectile to be fired, so the projectile to be fired stops before the barrel because of its smaller diameter but is able to pass out of the barrel when pressure is applied to the projectiles; a pressurization device connected to the projectile holder with the pressurization device fluidically connected to the projectile holder; a device for activating the pressurization device; a device for biasing located within the projectile holder and forcing any projectile in the projectile holder to be moved toward the barrel; and a trigger connected to the pressurization device in such a way that when the trigger is pulled pressure passes into the projectile holder forcing the projectiles out of the barrel.
    Type: Grant
    Filed: August 7, 1987
    Date of Patent: October 8, 1991
    Inventor: William G. Young
  • Patent number: 4967724
    Abstract: A gas pressure pistol, particularly a sports pistol, comprises a compressed gas container, which is disposed below the barrel and which via a passage that is adapted to be closed by a valve communicates with the rear end of the barrel, also comprises a bolt, which is guided in a housing and is adapted to be retracted from the rear end of the barrel, and a trigger mechanism, which is accommodated in the housing and comprises a trigger lever, which is pivotally movable in a pull-off sense, a trigger blade carried by the trigger lever, a spring which opposes the movement of the trigger lever in the pull-off sense, a sear, which cooperates with the trigger lever, and a catch lever, which in a catching position interlocks with the sear and is adapted to retain a spring-loaded striker, which serves to actuate the valve.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: November 6, 1990
    Assignee: Steyr-Daimler-Puch AG
    Inventor: Emil Senfter
  • Patent number: 4910903
    Abstract: A trigger mechanism, particularly for sports pistols, comprises a trigger lever, which carries a trigger blade and is biased by a spring having a variable initial stress and opposing the pull-off movement of the trigger lever. The mechanism also comprises a sear, which cooperates with the trigger lever, and a catch lever, which is adapted to retain the spring-loaded striker and to interlock with the sear in a catching position. The trigger lever is movable against the sear against the spring force.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: March 27, 1990
    Assignee: Steyr-Daimler-Puch AG
    Inventor: Emil Senfter
  • Patent number: 4865009
    Abstract: An airgun comprises a discharge chamber (3) for compressed air or gas. Compression of the air in the discharge tube is achieved by a pressurizing chamber (2) which contains pressurized gas or air. In one embodiment the discharge chamber (3) is filled by gas or air from the pressurizing chamber until a predetermined pressure within the discharge chamber is reached. A second embodiment provides liquefied gas in the pressurizing chamber that acts against a movable wall so as to ensure that the discharge chamber is at the liquefaction pressure.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: September 12, 1989
    Inventors: John B. M. Ford, Gerald V. Cardew
  • Patent number: 4850330
    Abstract: This invention relates to a device for shooting bullets by pressure medium for use in a toy gun. This mechanism includes a piston member fitted into an outer tubular member and reciprocating in response to changes in the pressure medium, and wait hook arms are provided in the piston member. Further, an inner tubular body having a gas injection hole is fixedly provided within the outer tubular member, and a needle valve for opening and closing the injection hole is provided in association with the inner tubular body. This needle valve is provided with a weight biased by a spring member. The weight is disengaged from the wait hook arm by the advancing movement of the piston member and hits against the rear end portion of the needle valve. In addition, at the rear end portion of the needle valve, there is provided a seal valve for temporarily closing a gas introduction hole provided on the side of the rear end portion of the outer tubular member by hitting of the weight.
    Type: Grant
    Filed: December 1, 1987
    Date of Patent: July 25, 1989
    Inventor: Katsumi Nagayoshi
  • Patent number: 4774929
    Abstract: A gun is provided with a pivoting barrel and a cocking and retaining lever which cocks the hammer and retains the barrel in the firing position. When the lever moves to the unlocking position, the barrel is released and the hammer is cocked. When the barrel is loaded, the barrel is pivoted back to the firing position and the lever is moved to the position to retain the barrel.
    Type: Grant
    Filed: October 9, 1986
    Date of Patent: October 4, 1988
    Assignee: The Coleman Company, Inc.
    Inventor: Keith L. Milliman
  • Patent number: 4712537
    Abstract: A method and apparatus for treating ear infections in which a straight linear path is established from an external position to a specific target site on the eardrum. Thereafter a laser beam is caused to be emitted along the established path to impinge upon the eardrum to create a hole at the target site. Immediately thereafter, a hollow, tubular drainage missile is caused to be projected along the same established path into the hole formed at the target site to seat therein. The missile maintains the hole open for the drainage of the middle ear for so long as the physician deems necessary.
    Type: Grant
    Filed: August 13, 1986
    Date of Patent: December 15, 1987
    Inventor: Daniel J. Pender
  • Patent number: 4616622
    Abstract: A gas gun includes a pressure regulator assembly which controls the velocity of projectiles fired by the gun by adjusting the pressure within the gas chamber of the gun. The regulator assembly includes a spring-biased piston which is slidable within a gas seal between a source of pressurized gas and the gas chamber. The piston is movable between a first position in which gas can flow from the source of pressurized gas to the gas chamber and a second position in which gas is prevented from flowing from the source of pressurized gas to the gas chamber. The force exerted on the piston by the spring can be adjusted to control the gas pressure at which the piston moves to its second position.
    Type: Grant
    Filed: August 10, 1984
    Date of Patent: October 14, 1986
    Assignee: The Coleman Company, Inc.
    Inventor: Keith Milliman
  • Patent number: 4602608
    Abstract: A supply mechanism for gas projectile firing devices includes: a magazine having a storage column for projectiles and a transfer slide for moving projectiles from a column to a position in line with the firing chamber; a mobile element having a transfer bar for moving the transfer slide from the column to its position next to the firing chamber, an insertion piston for moving projectiles from the transfer slide into the firing chamber and a firing pin for opening the valve connecting the compressed gas reservoir to the firing chamber; a trigger which activates the firing and prevents double insertion of a projectile, and a cocking rod which controls the mobile element and the trigger. The mechanism is applicable to training and sports weapons, and to nail and staple guns.
    Type: Grant
    Filed: May 29, 1984
    Date of Patent: July 29, 1986
    Assignee: Etat Francais represente par le Delegue General pour l'armement
    Inventors: Jean S. Lacam, Rene E. Pons, Pierre J. Simand
  • Patent number: 4531503
    Abstract: A single-action, gas powered repeating pistol has a sliding unitary barrel and hammer assembly with the barrel and hammer aligned on opposite sides of a fixed pressure chamber. In the uncocked condition, the hammer extends rearwardly of the main frame so that cocking may be effected by merely slapping the rear of the hammer to force the assembly forward to be retained by a trigger mounted sear.
    Type: Grant
    Filed: February 21, 1984
    Date of Patent: July 30, 1985
    Inventor: Robert G. Shepherd
  • Patent number: 4336787
    Abstract: The present invention provides an improved weapon such as a rifle or a pistol including a system of levers that are displaceable laterally towards the front part of the weapon for operating structure for the intake and compression of the compression air used in the weapon. The barrel for the weapon is axially displaceable on a slide by utilizing the displacement of the piston for the intake and compression of air. Sealing structure is provided on the breach of the barrel in the form of a tablet-shaped packing that also insures the correct insertion of the ammunition.
    Type: Grant
    Filed: July 21, 1980
    Date of Patent: June 29, 1982
    Inventor: Giacomo Cagnoni
  • Patent number: 4191158
    Abstract: The plastic valve includes an elongated plastic valve stem and an elongated pin. An end portion of the pin projects from an end of the plastic stem with the remaining portion of the pin being wholly encapsulated by the stem. The pin is generally cylindrical and has a pair of reduced diameter portions defining shoulders forming impact surfaces which butt the axially opposed portions of the encapsulating stem. The stem preferably has a tapered sealing surface irradiated by beta rays to provide a sealing surface highly resistant to creep and deformation. The sealing surface is coated with Fluorocarbon Polymer to reduce its chemical activity and to improve its sealing characteristics. The opposite end of the pin serves as a deflector opposite the molding gate to control the flow of plastic material during injection molding of the stem to prevent weld lines on the seal surface.
    Type: Grant
    Filed: May 17, 1977
    Date of Patent: March 4, 1980
    Assignee: Bangor Punta Operations, Inc.
    Inventor: Roger J. Curran
  • Patent number: 4164929
    Abstract: A removable projectile loader for a gun facilitates loading a gun with a projectile and is removable from the gun to permit a jammed projectile to be cleared from the gun. The loader is provided with a bore into which a projectile is loaded, and the loader is movable to a firing position to align the bore with the barrel of the gun. A bolt on the gun is movable through the bore of the loader into the barrel to position the projectile in the barrel for firing.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: August 21, 1979
    Assignee: The Coleman Company, Inc.
    Inventors: Sigurds Liepins, James W. Crane
  • Patent number: 4147152
    Abstract: A projectile is propelled from the gun when a valve that controls the gas storage chamber of the gun is momentarily unseated, thereby admitting a short burst or charge of gas into the space immediately behind the projectile. The barrel that confines and controls the projectile during its movement out of the gun is itself driven rearwardly by spring action to accomplish unseating of the valve through an actuating stem at the rear of the barrel, and during such rearward movement of the barrel, the projectile is carried therewith so as to reduce the volume of the space behind the projectile in which the gas may expand before acting upon the projectile.
    Type: Grant
    Filed: June 3, 1977
    Date of Patent: April 3, 1979
    Assignee: Victor United, Inc.
    Inventors: Earl L. Fischer, Lee F. Garmon, Jr.
  • Patent number: 4143636
    Abstract: A safety link assembly prevents discharge or firing of a gun unless the trigger is pulled. The assembly includes a hammer link pivotally connected to a link mounting member. The link mounting member is pivotally mounted on the same pivoting axis as the trigger, and a trigger-engaging portion on the link mounting member engages the trigger so that movement of the trigger pivots the link mounting member. The hammer of the gun is pivotally mounted on the gun for movement between cocked and fired positions. When the hammer is in its fired position, it is spaced from the firing mechanism of the gun. When the trigger is pulled, the link mounting member pivots with the trigger to move the safety link into position between the firing mechanism and the hammer so that when the trigger releases the hammer from its cocked position, the hammer will strike the safety link and force it against the firing mechanism to discharge the gun.
    Type: Grant
    Filed: July 12, 1977
    Date of Patent: March 13, 1979
    Assignee: The Coleman Company, Inc.
    Inventors: Sigurds Liepins, James W. Crane
  • Patent number: 4116193
    Abstract: A pressured gas or air operated repeater rifle which enables safe and accurate firing regardless of the rapidity of firing. A barrel of the rifle is provided with a bolt arranged slidably in a bore and a carrier which is positioned so as to extend through the bore at horizontal right angle to the bolt and to be slidable in the barrel and which is in freely sliding contact with a magazine opening at horizontal right angle to the direction of the magazine chamber. The carrier is provided with a lateral through hole at a position to match the opening of the magazine when the carrier shifts to the magazine side, and also to match the bore when it shifts in the direction opposite to the magazine side. An operation bar which connects the bolt with an operation bar handle on the cylinder is provided. Reciprocating movement of the carrier is provided by a mechanism positioned in the gap between the bolt and the hammer chamber arranged above and below.
    Type: Grant
    Filed: December 2, 1976
    Date of Patent: September 26, 1978
    Assignee: Sharp Rifle Company, Ltd.
    Inventor: Kensuke Chiba
  • Patent number: 4038961
    Abstract: A pneumatic rifle and hand gun for discharging a projectile under the influence of a source of compressed gas such as air. The pressurization of the source is achieved by with pressure increasing mechanisms which compress atmospheric air in two separate stages using a single cocking or pumping action of the rifle or hand gun. The rifle and hand gun are provided with a recoil compensation device to eliminate recoil of the rifle and hand gun during discharge of the projectile. The compression of the atmospheric air to provide the source of high pressure is achieved through a novel piston and cylinder arrangement which pressurizes the gas during pumping or cocking action of the rifle or hand gun. A further mechanism provides for a projectile discharged from the rifle or hand gun to be subjected to constant pressure during discharge thereof.
    Type: Grant
    Filed: August 22, 1975
    Date of Patent: August 2, 1977
    Assignee: Dahltron Corporation
    Inventor: Sigfrid M. Olofsson