Barrel attachment for a gas gun

Abstract

A spin attachment attachable to the firing end of the barrel of a compressed gas gun and a method of using the same is disclosed. The spin attachment allows a user to control the spin on a projectile exiting the muzzle end of a barrel of a compressed gas gun, which in turn, allows the user to curve the trajectory of the projectile after it is fired from the spin attachment. The spin attachment comprises a housing having a first open end, a second end adapted for attachment to the muzzle end of a barrel of a compressed gas gun, and an inner wall defining a through passage that has central longitudinal axis with the muzzle, a deflection wall that is positioned within the housing, the deflection wall having a stationary end adjacent the muzzle and a moveable portion adjacent to the open end of the housing, and, a deflection wall adjuster mounted in the housing between the housing and the deflection wall and moveable to move the moveable portion of the deflection wall.

1 . A device for controlling spin on a projectile exiting the muzzle end of a barrel of a compressed gas gun, the device comprising: 
 a housing having a first open end, a second end adapted for attachment to the muzzle end, and an inner wall defining a through passage that has central longitudinal axis;    a deflection wall that is positioned within the housing, the deflection wall having a stationary end adjacent the muzzle and a moveable portion adjacent to the open end of the housing; and,    a deflection wall adjuster mounted in the housing between the housing and the deflection wall and moveable to move the moveable portion of the deflection wall.    
     
     
         2 . The device of  claim 1 , wherein the second end of the housing is a rotatable attachment to the muzzle end of the barrel.  
     
     
         3 . The device of  claim 1 , wherein the adjuster is a slider adjuster that moves within a longitudinal slot defined in the housing.  
     
     
         4 . The device of  claim 3 , wherein the second end of the housing is a rotatable attachment to the muzzle end of the barrel.  
     
     
         5 . The device of  claim 3 , wherein the longitudinal slot has a plurality of defined stops.  
     
     
         6 . The device of  claim 5 , wherein the second end of the housing is a rotatable attachment to the muzzle end of the barrel.  
     
     
         7 . The device of  claim 3 , wherein the housing further comprises an inwardly sloping wall adjacent the slot, wherein the sloped wall includes stepped projections, and wherein the adjuster further comprises a slider that engages the stepped projections as the slider is moved from a first position to a second position, the slider inclined toward the central longitudinal axis by the sloped wall.  
     
     
         8 . The spin attachment device of  claim 1 , wherein the deflection wall further comprises at least one flange, and wherein the inner wall of the housing further comprises at least one groove for engaging the at least one flange of the deflection wall.  
     
     
         9 . The spin attachment device of  claim 7 , further comprising a rail positioned between the deflection wall and the inner wall of the housing, the rail engaging a portion of the inner wall of the housing, and wherein the slider further comprises at least one rail extension positioned to run along the rail as the slider is moved from a first position to a second position  
     
     
         10 . A barrel attachment device for attachment to the muzzle end of a barrel of a compressed gas gun, the spin attachment comprising: 
 a housing having a first end and a second end and an inner wall and an outer wall adapted for attachment to the muzzle end of a compressed gas gun barrel, the housing having a passage therethrough, the passage having a central longitudinal axis, the housing having a slot through a wall of the housing;    a deflection wall disposed at least partially within the housing adjacent the inner wall having a first end positioned adjacent the first end of the housing and a second end positioned adjacent the second end of the housing, the deflection wall having a frictional contact surface facing the passage, the deflection wall having a moveable portion and a secured portion hingedly engaging the housing;    an adjuster positioned between the deflection wall and the inner wall of the housing for adjusting the position of the moveable portion of the deflection wall relative to the central longitudinal axis, the adjuster having at least a portion extending through the slot in the housing.    
     
     
         11 . The barrel attachment device of  claim 10 , wherein the housing further comprises an inwardly sloping wall adjacent the slot, wherein the sloped wall includes stepped projections, and wherein the adjuster further comprises a slider that engages the stepped projections as the slider is moved from a first position to a second position, the slider inclined toward the central longitudinal axis by the sloped wall.  
     
     
         12 . The spin attachment device of  claim 10 , wherein the deflection wall further comprises at least one flange, and wherein the inner wall of the housing further comprises at least one groove for engaging the at least one flange of the deflection wall.  
     
     
         13 . The spin attachment device of  claim 11 , further comprising a rail positioned between the deflection wall and the inner wall of the housing, the rail engaging a portion of the inner wall of the housing, and wherein the slider further comprises at least one rail extension positioned to run along the rail as the slider is moved from a first position to a second position.  
     
     
         14 . A compressed gas gun and barrel attachment device, comprising: 
 a compressed gas gun, the gun including a gun body and a barrel having a bore therethrough and a muzzle end opposite the gun body;    a spin attachment device rotatably attached to the muzzle end of the barrel, comprising: 
 a housing having first end and second end rotatably attached to the muzzle end of the barrel, the housing having a passage therethrough, the passage having a central longitudinal axis aligned with the bore of the barrel;  
 a deflection wall disposed at least partially within the housing adjacent the passage having a first end positioned adjacent the first end of the housing and a second end positioned adjacent the second end of the housing, the deflection wall having a frictional surface adjacent the passage, the deflection wall having a moveable portion and a secured portion hingedly engaging the housing;  
 an adjuster positioned between the deflection wall and the housing for adjusting the position of the moveable portion of the deflection wall relative to the central longitudinal axis.  
   
     
     
         15 . The barrel attachment device of  claim 14 , wherein the housing further comprises an inwardly sloping wall adjacent the slot, wherein the sloped wall includes stepped projections, and wherein the adjuster further comprises a slider that engages the stepped projections as the slider is moved from a first position to a second position, the slider inclined toward the central longitudinal axis by the sloped wall.  
     
     
         16 . The spin attachment device of  claim 14 , wherein the deflection wall further comprises at least one flange, and wherein the inner wall of the housing further comprises at least one groove for engaging the at least one flange of the deflection wall.  
     
     
         17 . The spin attachment device of  claim 15 , further comprising a rail positioned between the deflection wall and the inner wall of the housing, the rail engaging a portion of the inner wall of the housing, and wherein the slider further comprises at least one rail extension positioned to run along the rail as the slider is moved from a first position to a second position.  
     
     
         18 . A method of imparting a spin upon a projectile fired from a compressed gas gun, comprising the steps of: 
 (a) providing a compressed gas gun having a barrel including a bore therethrough;    (b) providing a barrel attachment device rotatably attached to the muzzle end of the barrel and including a passage in communication with the bore of the barrel, the barrel attachment device including a deflection wall having a frictional surface, the deflection wall having a moveable portion moveable relative to the passage, the barrel attachment including a slideable adjuster for adjusting the position of the moveable portion of the deflection wall relative to the passage;    (c) positioning the adjuster to move the moveable portion of the deflection wall to a user-selected position; and,    (d) firing a projectile from the compressed gas gun.    
     
     
         19 . The method of imparting a spin upon a projectile fired from a compressed gas gun according to  claim 13 , further comprising the step of rotating the barrel attachment device to a user-selected position while the spin attachment device is rotatably attached to the barrel relative to the barrel after step (c).