# US 7,610,907 B1 · Paintball marker action assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,610,907 B1 - Document ID: US7610907B1 - Status: Granted - Kind: B1 - Application number: 11/614,324 - Filed: 2006-12-21 - Granted: 2009-11-03 - Earliest claimed: 2005-12-22 - Inventors: Josh Coray - Web page: https://patentgrep.com/patent/US7610907B1 ## CPC - F41B 11/722: for controlling gas pressure for loading or feeding only - F41B 11/723: for controlling gas pressure for firing the projectile only - F41B: WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR (projectiles for fishing, e.g. fish-spears, A01K81/00; sports implements for throwing A63B65/00, e.g. boomerangs A63B65/08; stationary apparatus for projecting sports balls, e.g. tennis balls, A63B69/40; throwing or slinging toys A63H33/18; knives, axes B26B; projectiles or missiles other than those incorporating springs as projecting means F42B6/00) ## Abstract A paintball marking system comprising a bolt assembly and a spool assembly which are operationally arranged to move in conjunction with one another, whereby the changing of pressure of an actuating chamber of the spool assembly repositions the piston to allow communication of a dump chamber having compressed gas therein be released to the bolt assembly for accelerating a paintball. ## Claims ### Claim 1 A paintball marker system operationally configured to fire a paint ball with pressurized gas from a pressurized gas source, the paintball marker system comprising: a) a frame having a bolt assembly housing region and a spool assembly housing region, the frame further having a actuating chamber surface defining in part an actuating chamber, b) a spool assembly comprising a piston having an actuating ram and a valve ram, the actuator ram having an actuating ram chamber surface which in part defines the actuating chamber, the valve ram positioned within a valve body and having a valve ram dump surface defining in part a dump chamber that is operatively arranged to be in communication with a high-pressure source, the actuating ram and the valve ram being connected to one another on the piston and both move substantially synchronously with respect to one another, c) a bolt assembly comprising a bolt member having a paintball receiving location, the bolt assembly having a gas passage to communicate with pressurized gas from the dump chamber, d) a firing system comprising a trigger switch having a trigger line in communication with the actuating chamber, e) whereas the spool assembly and the bolt assembly are operatively arranged to move in conjunction with one another where the paintball marker system has a loading orientation where the paintball receiving location is orientated to allow a paintball to be positioned thereby and the bolt assembly does not have gas pressure from the pressurized gas source when in the loading orientation, the valve ram dump surface having a pressure effective surface area which has pressure applied thereto by the pressure within the dump chamber which is higher than atmospheric pressure, and whereby a change of pressure in the actuating chamber by changing the pressure within the trigger line by the trigger switch biases the piston from a loading orientation to a firing orientation where the valve ram is disengaged from the valve body and pressure from within the dump chamber is in communication with the gas passage of the bolt assembly to accelerate, and f) the actuating ram has an actuating ram dump surface and where the actuating ram dump surface and the valve ram dump surface define in part a dump chamber and the actuating ram dump surface and the valve ram dump surface have pressure effective surface areas which both have pressure applied thereto by the pressure within the dump chamber which is higher than atmospheric pressure, and whereby a change of pressure in the actuating chamber biases the valve ram to disengage from the valve body and pressurized gas from within the dump chamber is in communication with the gas passage of the bolt assembly to accelerate the paint ball. ### Claim 2 (depends on 1) The paintball marker system as recited in claim 1 where the actuating chamber is at atmospheric pressure during the loading orientation, and the trigger switch pressurizes the actuating chamber where the pressure acting upon the actuating ram of the piston is sufficient to reposition the piston to a firing orientation. ### Claim 3 (depends on 2) The paintball marker system as recited in claim 2 where the pressure affected surface area of the valve ram dump surface of the valve ram of the piston is less than the pressure affected surface area of the actuating ram dump surface of the actuating ram and when the paintball marker system is in a loading orientation, the actuating chamber is pressurized above atmospheric, and a trigger switch which is operated by a firing mechanism reduces the pressure within the actuating chamber to position the piston from the loading orientation to the firing orientation. ### Claim 4 (depends on 3) The paintball marker system as recited in claim 3 where the trigger switch is in communication with a trigger line which is connected to a quick release valve interposed between the actuating chamber and the trigger line, whereby when the trigger line reduces pressure, the quick release valve dumps the compressed air within the actuating chamber at an accelerated rate. ### Claim 5 (depends on 4) The paintball marker system as recited in claim 4 where the quick release valve dumps the air through the actuating chamber from the high-pressure state to substantially atmospheric pressure at less than 1/10th of a second. ### Claim 6 (depends on 2) The paintball marker system as recited in claim 2 where the actuating chamber is at a first low pressure when in the loading orientation, and the trigger switch is optimally configured to pressurize the actuating chamber to a second high pressure whereby the second high pressure multiplied by the actuating chamber surface of the actuating ram is greater than the valve ram dump surface of the valve ram of the piston multiplied by the dump chamber pressure to reposition the ram from the loading orientation to the firing orientation. ### Claim 7 (depends on 6) The paintball marker system as recited in claim 6 where the second high pressure within the actuating chamber is substantially the same as the pressure within the dump chamber. ### Claim 8 (depends on 2) The paintball marker system as recited in claim 2 where the actuating ram dump surface of the actuating ram of the piston multiplied by the pressure within the dump chamber in a loading orientation is greater than the sum of a pressure effective surface area of the valve ram dump surface of the valve ram and the actuating chamber surface of the actuating ram multiplied by a loading orientation high pressure within the actuating chamber. ### Claim 9 (depends on 8) The paintball marker system as recited in claim 8 where the loading orientation high pressure of the actuating chamber is substantially the same as the dump chamber pressure when the paintball marker system is in a loading orientation. ### Claim 10 (depends on 8) The paintball marker system as recited in claim 8 where the loading orientation high pressure of the actuating chamber is less than the pressure within the dump chamber when the paintball marker system is in a loading orientation. ### Claim 11 (depends on 10) The paintball marker system as recited in claim 10 where the loading orientation high pressure of the actuating ram when in a loading orientation is less than one half of the pressure within the dump chamber when in a loading orientation, and a pressure regulating valve maintains the loading orientation high pressure and the pressure regulating valve is in communication with the high pressure source. ### Claim 12 (depends on 2) The paintball marker system as recited in claim 2 where no portion of the bolt assembly is pressurized when in a loading orientation. ### Claim 13 (depends on 1) The paintball marker system as recited in claim 1 where the bolt assembly and the spool assembly are positioned longitudinally rearward with respect to the frame when in a loading orientation, and the bolt assembly and the spool assembly are positioned in a longitudinally forward position when in a firing orientation. ### Claim 14 (depends on 13) The paintball marker system as recited in claim 13 where a high pressure source communication line is positioned in a forward region of the frame and the piston further comprises a cut-off ram which is properly configured to engage a cut-off tube to isolate the dump chamber from the high-pressure source when the piston is in a firing orientation. ### Claim 15 (depends on 1) The paintball marker system as recited in claim 1 where the dump chamber is not sealed from the pressurized gas source when the spool assembly is in a firing orientation. ### Claim 16 (depends on 1) The paintball marker system as recited in claim 1 where the actuating ram is positioned longitudinally forward of the valve ram of the piston. ### Claim 17 (depends on 1) The paintball marker system as recited in claim 1 where the valve ram extends beyond a chute region of the valve body be on a chute lip to allow communication between the dump chamber at a frame passageway interposed between the bolt assembly and the spool assembly, which provides communication of compressed gas within the dump chamber to the gas passageway of the bolt. ### Claim 18 (depends on 17) The paintball marker system as recited in claim 17 where the dump chamber is positioned rearwardly of the frame passageway. ### Claim 19 (depends on 1) The paintball marker system as recited in claim 1 where the bolt assembly and the spool assembly are operatively arranged to move in conjunction with one another from the loading orientation to the firing orientation where the bolt assembly moves longitudinally forwardly and the spool moves longitudinally rearwardly. ### Claim 20 (depends on 1) The paintball marker system as recited in claim 1 where the bolt assembly and the spool assembly are operatively arranged to move in conjunction with one another whereby a transfer gear translates forward movement in the piston with rearward movement of the bolt. ### Claim 21 (depends on 1) The paintball marker system as recited in claim 1 where the bolt assembly and the spool assembly are operatively arranged to move in conjunction with one another where as the actuating chamber repositions by way of pressure differential of the piston from the loading orientation to the firing orientation by displacing the piston in a longitudinal direction, a bolt pin engaged within a torque slot defined by a slot surface on the bolt rotates a ball receiving location which is in communication with a feed chamber when in the loading orientation, to a rotated position where the ball receiving location of the bolt is cut off in communication from the feed chamber when in a firing orientation, and pressure from the dump chamber is directed to the gas passageway of the bolt member. ### Claim 22 (depends on 1) The paintball marker system as recited in claim 1 where a second actuating chamber is in communication with a second actuating chamber ram and the trigger switch is operatively configured to direct pressure to the first actuating chamber to reposition the piston from the loading orientation to the firing orientation, and the second actuating chamber has a loading orientation pressure which is higher than atmospheric pressure and this pressure is released at the substantially same time as the pressure within the first actuating chamber is increased to reposition the piston from the loading orientation to the firing orientation. ### Claim 23 (depends on 22) The paintball marker system as recited in claim 22 where a second actuating ram dump surface has a pressure effective surface area that is substantially the same as the valve ram dump surface. ### Claim 24 (depends on 23) The paintball marker system as recited in claim 23 where the second actuating ram has a second actuating ram chamber surface that has a substantially similar pressure effective surface area as the actuating ram chamber surface of the actuating ram.