Compressed gas gun

Abstract

A compressed gas gun comprising a chassis, a pellet firing assembly including a breech and a slidable bolt mounted in the chassis, a valve assembly mounted in the chassis, a barrel assembly comprising a barrel, a grip for holding the gun, a trigger assembly comprising a trigger, and a magazine receiver for holding a removable magazine for storing pellets.

1 .- 58 . (canceled) 
     
     
         59 . A compressed gas gun comprising a chassis, a pellet firing assembly including a breech and a slidable bolt mounted in the chassis, a valve assembly mounted in the chassis, a barrel assembly comprising a barrel, a grip for holding the gun, a trigger assembly comprising a trigger, and a magazine receiver for holding a removable magazine for storing pellets, wherein the compressed gas gun further comprises:
 a refillable propellant gas storage reservoir formed within the chassis, and   an expansion chamber formed within the chassis, connected to the gas storage reservoir via a pressure regulator for storing expanded gas supplied from the gas storage reservoir, the expansion chamber supplying propellant gas to the pellet firing assembly via the valve assembly.   
     
     
         60 . The compressed gas gun of  claim 59 , wherein the propellant gas storage reservoir and the expansion chamber are bounded by walls of the chassis, the propellant gas storage reservoir refillable through a propellant fill valve accessible by an operator. 
     
     
         61 . The compressed gas gun of  claim 60 , wherein the propellant fill valve is positioned on and extends through one of said walls of the chassis, preferably a top wall of the chassis. 
     
     
         62 . The compressed gas gun of  claim 59 , wherein the pressure regulator is adjustable. 
     
     
         63 . The compressed gas gun of  claim 59 , wherein the chassis has a generally prismatic shape made of a machined extruded part. 
     
     
         64 . The compressed gas gun of  claim 63 , wherein the chassis is made of an extruded machined aluminium part. 
     
     
         65 . The compressed gas gun of  claim 59 , wherein the barrel assembly, grip, trigger, and magazine receiver are assembled and fixed to the chassis. 
     
     
         66 . The compressed gas gun of  claim 59 , wherein the slidable bolt comprises a bolt nose, a central bolt passage extending through the bolt nose, and a rear bolt chamber fluidly connected to the central bolt passage, the bolt nose comprising bolt nose outlets fluidly connected to the central bolt passage for the passage of propellant gas from a rear end of the bolt through the rear bolt chamber to a breech chamber of the breech. 
     
     
         67 . The compressed gas gun of  claim 66 , wherein the bolt nose comprises an inclined bolt nose tip facing slightly downwardly and forwardly configured to push pellets from the magazine to the breech chamber. 
     
     
         68 . The compressed gas gun according to  claim 66 , wherein the valve assembly comprises a fixed piston comprising a piston probe sealingly insertable in the central bolt passage configured to seal the central passage to block the flow of propellant gas to the breech chamber when the bolt is in a rearward position, and the piston probe configured to disengage the bolt passage when the bolt is in a forward position allowing propellant gas to flow through to the breech chamber. 
     
     
         69 . The compressed gas gun according to  claim 59 , further comprising a pellet dispersing device comprising a pellet dispersing nozzle mounted on an end of the barrel, and an enlargened bore section forming a widening shoulder in the barrel proximal the end of the barrel, the pellet dispersing nozzle comprising a constricting tapered bore ( 800 ) configured to deflect pellets to increase their dispersion. 
     
     
         70 . The compressed gas gun according to  claim 69 , wherein the constricting tapered bore has a non-axisymmetric shape, or an outlet of the constricting tapered bore has a non-axisymmetric shape, or both the constricting tapered bore and the outlet have a non-axisymmetric shape configured to disperse pellets in an obround area. 
     
     
         71 . The compressed gas gun according to  claim 59 , wherein the breech comprises a breech chamber configured to receive a plurality of pellets therein forming spaces therearound for flow of propellant gas towards the barrel bore, an end of the breech chamber interfacing with the barrel bore comprising a detent spring retaining the pellet in the breech chamber with a predefined spring force. 
     
     
         72 . The compressed gas gun according to  claim 71 , wherein the detent spring comprises or consists of a generally U-shaped spring wireform. 
     
     
         73 . The compressed gas gun according to  claim 59 , wherein the valve assembly comprises a slidable valve spool engageable by a trigger linkage coupled to the trigger, the valve spool having a first seal engaging in a fixed first sealing bore on a rear end and a second seal engaging a fixed second sealing bore on a forward end, the first and second seals having the same diameter, wherein the valve spool further comprises a third seal downstream of the second seal and having a slightly larger diameter than the first and second seal, the third seal configured to engage a third sealing bore when the second seal disengages the second sealing bore configured to provide tactile feedback on the trigger of a firing action. 
     
     
         74 . A compressed gas gun comprising a chassis, a pellet firing assembly including a breech and a slidable bolt mounted in the chassis, a valve assembly mounted in the chassis, a barrel assembly comprising a barrel, a grip for holding the gun, a trigger assembly comprising a trigger, and a magazine receiver for holding a removable magazine for storing pellets, wherein the slidable bolt comprises a bolt nose, a central bolt passage extending through the bolt nose, and a rear bolt chamber fluidly connected to the central bolt passage, the bolt nose comprising bolt nose outlets fluidly connected to the central bolt passage for the passage of propellant gas from a rear end of the bolt through the rear bolt chamber to a breech chamber of the breech. 
     
     
         75 . The compressed gas gun of  claim 74 , wherein the bolt nose comprises an inclined bolt nose tip facing slightly downwardly and forwardly configured to push pellets from the magazine to the breech chamber. 
     
     
         76 . The compressed gas gun according to  claim 74 , wherein the valve assembly comprises a fixed piston comprising a piston probe sealingly insertable in the central bolt passage configured to seal the central passage to block the flow of propellant gas to the breech chamber when the bolt is in a rearward position, and the piston probe configured to disengage the bolt passage when the bolt is in a forward position allowing propellant gas to flow through to the breech chamber. 
     
     
         77 . The compressed gas gun of  claim 74 , wherein the chassis has a generally prismatic shape made of a machined extruded part. 
     
     
         78 . The compressed gas gun of  claim 77 , wherein the chassis is made of an extruded machined aluminium part. 
     
     
         79 . The compressed gas gun of  claim 74 , wherein the barrel assembly, grip, trigger, and magazine receiver are assembled and fixed to the chassis. 
     
     
         80 . The compressed gas gun according to  claim 74 , further comprising a pellet dispersing device comprising a pellet dispersing nozzle mounted on an end of the barrel, and an enlargened bore section forming a widening shoulder in the barrel proximal the end of the barrel, the pellet dispersing nozzle comprising a constricting tapered bore ( 800 ) configured to deflect pellets to increase their dispersion. 
     
     
         81 . The compressed gas gun according to  claim 80 , wherein the tapered bore has a non-axisymmetric shape, or an outlet of the tapered bore has a non-axisymmetric shape, or both the tapered bore and the outlet have a non-axisymmetric shape configured to disperse pellets in an obround area. 
     
     
         82 . The compressed gas gun according to  claim 74 , wherein the breech comprises a breech chamber configured to receive a plurality of pellets therein forming spaces therearound for flow of propellant gas towards the barrel bore, an end of the breech chamber interfacing with the barrel bore comprising a detent spring retaining the pellet in the breech chamber with a predefined spring force. 
     
     
         84 . The compressed gas gun according to  claim 82 , wherein the detent spring comprises or consists of a generally U-shaped spring wireform. 
     
     
         85 . The compressed gas gun according to  claim 74 , wherein the valve assembly comprises a slidable valve spool engageable by a trigger linkage, the valve spool having a first seal engaging in a fixed first sealing bore on a rear end and a second seal engaging a fixed second sealing bore on a forward end, the first and second seals having the same diameter, wherein the valve spool further comprises a third seal downstream of the second seal and having a slightly larger diameter than the first and second seal, the third seal configured to engage a third sealing bore when the second seal disengages the second sealing bore configured to provide tactile feedback on the trigger of a firing action. 
     
     
         86 . A compressed gas gun comprising a chassis, a pellet firing assembly including a breech and a slidable bolt mounted in the chassis, a valve assembly mounted in the chassis, a barrel assembly comprising a barrel, a grip for holding the gun, a trigger assembly comprising a trigger, and a magazine receiver for holding a removable magazine for storing pellets, wherein the valve assembly comprises a slidable valve spool engageable by a trigger linkage, the valve spool having a first seal engaging in a fixed first sealing bore on a rear end and a second seal engaging a fixed second sealing bore on a forward end, the first and second seals having the same diameter, wherein the valve spool further comprises a third seal downstream of the second seal and having a slightly larger diameter than the first and second seal, the third seal configured to engage a third sealing bore when the second seal disengages the second sealing bore configured to provide tactile feedback on the trigger of a firing action. 
     
     
         87 . The compressed gas gun of  claim 86 , wherein the chassis has a generally prismatic shape made of a machined extruded part. 
     
     
         88 . The compressed gas gun of  claim 87 , wherein the chassis is made of an extruded machined aluminium part. 
     
     
         89 . The compressed gas gun of  claim 86 , wherein the barrel assembly, grip, trigger, and magazine receiver are assembled and fixed to the chassis. 
     
     
         90 . The compressed gas gun of  claim 86 , wherein the slidable bolt comprises a bolt nose, a central bolt passage extending through the bolt nose, and a rear bolt chamber fluidly connected to the central bolt passage, the bolt nose comprising bolt nose outlets fluidly connected to the central bolt passage for the passage of propellant gas from a rear end of the bolt through the rear bolt chamber to a breech chamber of the breech. 
     
     
         91 . The compressed gas gun of  claim 90 , wherein the bolt nose comprises an inclined bolt nose tip facing slightly downwardly and forwardly configured to push pellets from the magazine to the breech chamber. 
     
     
         92 . The compressed gas gun according to  claim 90 , wherein the valve assembly comprises a fixed piston comprising a piston probe sealingly insertable in the central bolt passage configured to seal the central passage to block the flow of propellant gas to the breech chamber when the bolt is in a rearward position, and the piston probe configured to disengage the bolt passage when the bolt is in a forward position allowing propellant gas to flow through to the breech chamber. 
     
     
         93 . The compressed gas gun according to  claim 86 , further comprising a pellet dispersing device comprising a pellet dispersing nozzle mounted on an end of the barrel, and an enlargened bore section forming a widening shoulder in the barrel proximal the end of the barrel, the pellet dispersing nozzle comprising a constricting tapered bore ( 800 ) configured to deflect pellets to increase their dispersion. 
     
     
         94 . The compressed gas gun according to  claim 93 , wherein the tapered bore has a non-axisymmetric shape, or an outlet of the tapered bore has a non-axisymmetric shape, or both the tapered bore and the outlet have a non-axisymmetric shape configured to disperse pellets in an obround area. 
     
     
         95 . The compressed gas gun according to  claim 86 , wherein the breech comprises a breech chamber configured to receive a plurality of pellets therein forming spaces therearound for flow of propellant gas towards the barrel bore, an end of the breech chamber interfacing with the barrel bore comprising a detent spring retaining the pellet in the breech chamber with a predefined spring force. 
     
     
         96 . The compressed gas gun according to  claim 95 , wherein the detent spring comprises or consists of a generally U-shaped spring wireform. 
     
     
         97 . A compressed gas gun comprising a chassis, a pellet firing assembly including a breech and a slidable bolt mounted in the chassis, a valve assembly mounted in the chassis, a barrel assembly comprising a barrel, a grip for holding the gun, a trigger assembly comprising a trigger, and a magazine receiver for holding a removable magazine for storing pellets, further comprising a pellet dispersing device comprising a pellet dispersing nozzle mounted on an end of the barrel, and an enlargened bore section forming a widening shoulder in the barrel proximal the end of the barrel, the pellet dispersing nozzle comprising a constricting tapered bore ( 800 ) configured to deflect pellets to increase their dispersion. 
     
     
         98 . The compressed gas gun according to  claim 97 , wherein the constricting tapered bore has a non-axisymmetric shape, or an outlet of the constricting tapered bore has a non-axisymmetric shape, or both the constricting tapered bore and the outlet have a non-axisymmetric shape configured to disperse pellets in an obround area. 
     
     
         99 . The compressed gas gun according to  claim 97 , wherein the breech comprises a breech chamber configured to receive a plurality of pellets therein forming spaces therearound for flow of propellant gas towards the barrel bore, an end of the breech chamber interfacing with the barrel bore comprising a detent spring retaining the pellet in the breech chamber with a predefined spring force. 
     
     
         100 . The compressed gas gun according to  claim 99 , wherein the detent spring comprises or consists of a generally U-shaped spring wireform. 
     
     
         101 . The compressed gas gun of  claim 97 , wherein the chassis has a generally prismatic shape made of a machined extruded part. 
     
     
         102 . The compressed gas gun of  claim 101 , wherein the chassis is made of an extruded machined aluminium part. 
     
     
         103 . The compressed gas gun of  claim 97 , wherein the barrel assembly, grip, trigger, and magazine receiver are assembled and fixed to the chassis. 
     
     
         104 . The compressed gas gun of  claim 97 , wherein the slidable bolt comprises a bolt nose, a central bolt passage extending through the bolt nose, and a rear bolt chamber fluidly connected to the central bolt passage, the bolt nose comprising bolt nose outlets fluidly connected to the central bolt passage for the passage of propellant gas from a rear end of the bolt through the rear bolt chamber to a breech chamber of the breech. 
     
     
         105 . The compressed gas gun of  claim 104 , wherein the bolt nose comprises an inclined bolt nose tip facing slightly downwardly and forwardly configured to push pellets from the magazine to the breech chamber. 
     
     
         106 . The compressed gas gun according to  claim 104 , wherein the valve assembly comprises a fixed piston comprising a piston probe sealingly insertable in the central bolt passage configured to seal the central passage to block the flow of propellant gas to the breech chamber when the bolt is in a rearward position, and the piston probe configured to disengage the bolt passage when the bolt is in a forward position allowing propellant gas to flow through to the breech chamber. 
     
     
         107 . The compressed gas gun according to  claim 97 , wherein the valve assembly comprises a slidable valve spool engageable by a trigger linkage, the valve spool having a first seal engaging in a fixed first sealing bore on a rear end and a second seal engaging a fixed second sealing bore on a forward end, the first and second seals having the same diameter, wherein the valve spool further comprises a third seal downstream of the second seal and having a slightly larger diameter than the first and second seal, the third seal configured to engage a third sealing bore when the second seal disengages the second sealing bore configured to provide tactile feedback on the trigger of a firing action. 
     
     
         108 . The compressed gas gun of  claim 97 , further comprising:
 a refillable propellant gas storage reservoir formed within the chassis, and   an expansion chamber formed within the chassis, connected to the gas storage reservoir via a pressure regulator for storing expanded gas supplied from the gas storage reservoir, the expansion chamber supplying propellant gas to the pellet firing assembly via the valve assembly.   
     
     
         109 . The compressed gas gun of  claim 108 , wherein the propellant gas storage reservoir and the expansion chamber are bounded by walls of the chassis, the propellant gas storage reservoir refillable through a propellant fill valve accessible by an operator. 
     
     
         110 . The compressed gas gun of  claim 109 , wherein the propellant fill valve is positioned on and extends through one of said walls of the chassis, preferably a top wall of the chassis. 
     
     
         111 . The compressed gas gun of  claim 108 , wherein the pressure regulator is adjustable. 
     
     
         112 . The compressed gas gun according to  claim 97 , comprising an external gas supply. 
     
     
         113 . The compressed gas gun according to  claim 112 , wherein the external gas supply comprises a bulk storage bottle containing a compressed CO2 or HPA (high pressure air) system worn on a belt or backpack and connected to the compressed gas gun with a hose. 
     
     
         114 . The compressed gas gun according to  claim 112 , wherein the external gas supply comprises a compressed gas cylinder removably mounted within or on the chassis 
     
     
         115 . The compressed gas gun according to  claim 112 , wherein the compressed gas gun comprises an expansion chamber and the external gas supply is connected directly to the expansion chamber to feed gas into the expansion chamber. 
     
     
         116 . The compressed gas gun according to  claim 97 , wherein the magazine receiver comprises a spring magazine retention element fixed to a side wall of the magazine receiver, the spring magazine retention element having a V shaped finger extending through an orifice in the side wall and configured to engage in a magazine retention window or notch in the side of the magazine. 
     
     
         117 . The compressed gas gun according to  claim 116 , wherein the spring magazine retention element comprises or consists of a stamped and formed spring sheet metal.