Paintball gun assembly
A paintball gun assembly comprises a casing having a barrel and a bolt moveable in the barrel to select and fire paintballs. There are located in the casing under the barrel in a linear array generally parallel with the barrel a low pressure regulator, a chamber for air under pressure, a spool valve, a poppet valve, a solenoid and a battery. The spool valve comprises an elongated housing of circular section in which a spool is reciprocable to move seals on the spool relative to radial openings of the housing. The valve has an input opening at one end of the spool and the spool has a longitudinal bore to communicate said input opening with the periphery of the spool at a position between an adjacent pair of said seals.
1. A paintball gun assembly comprising a casing, a low pressure regulator for receiving compressed air from a source, a chamber for receiving air under pressure from the regulator, a spool valve, and an actuator means for actuating the spool valve, the casing having a barrel and a bolt moveable in the barrel to select and fire paintballs, the spool valve comprising an elongated housing of circular section in which a spool is reciprocable, the housing including radial openings therein, the spool including two seals associated therewith and a longitudinal bore therein, the longitudinal bore including an inlet at one end of the spool and an outlet between the two seals for selectively communicating the chamber with the radial openings in the housing for controlling movement of the bolt, wherein the regulator, the chamber, the spool valve and the actuator are located in the casing under the barrel and arranged in an approximately linear array generally parallel with the barrel.
2. A paintball gun assembly as claimed in claim 1 , wherein the housing has four radial openings spaced longitudinally of the housing and the spool has four seals spaced longitudinally of the spool, each said seals comprising an o-ring in a respective circumferential groove in a periphery of a portion of the spool which is a sliding fit within the housing.
3. A paintball gun assembly as claimed in claim 2 , wherein the outlet is between an inner pair of said four seals spaced longitudinally of the spool.
4. A paintball gun assembly as claimed in claim 1 , wherein said chamber for air under pressure is located at one end of the spool valve adjacent the inlet to communicate with said inlet, the actuator means being provided at its other end.
5. A paintball gun assembly as claimed in claim 1 , wherein said actuator means for actuating the spool valve comprises a poppet valve which is actuated by a solenoid.
6. A paintball gun assembly as claimed in claim 5 , wherein said means for actuating the spool valve further comprises a battery for energizing the solenoid.
7. A paintball gun assembly as claimed in claim 1 , further comprising a second air chamber in front of seals on the bolt and a third air chamber behind seals on the bolt.
8. A paintball gun assembly as claimed in claim 7 , wherein a first of the radial openings in the housing communicates with the second air chamber and a second of the radial openings in the housing communicates with the third air chamber.
9. A paintball gun assembly as claimed in claim 3 , further comprising a second air chamber in front of seals on the bolt in communication with a first of the radial openings in the housing and a third air chamber behind seals on the bolt in communication with a second of the radial openings in the housing, wherein the outlet selectively communicates with the first and second radial openings.
10. A paintball gun assembly as claimed in claim 9 , wherein a third of the radial openings in the housing communicates with the second air chamber and a fourth of the radial openings in the housing communicates with the third air chamber, the third and fourth radial openings being arranged to vent air respectively from the second and third air chambers.