Compressed gas gun having reduced breakaway-friction and high pressure dynamic separable seal flow control device
View Patent ↗A reduced breakaway-friction flow control and valving device for a compressed gas-powered projectile accelerator is disclosed having an improved means of reducing break-away friction, an improved sealing arrangement, and self-contained modular components to improve efficiency, manufacturability, and reduce size and weight.
1. A flow control and valving device for a compressed gas gun comprising:
a housing having a forward end and a rear end;
a breech formed within the housing, the breech in communication with a valve passage and a as source passage;
a bolt located in the breech moveable from a forward position to a rearward position, the bolt having a gas passage therethrough;
a gas source passage formed within the housing for communicating compressed gas from a compressed gas source;
a valve passage formed within the housing in communication with the gas source passage and the breech, the valve passage including an inner wall;
a valve slider having a forward end and a rear end selectively moveable from a forward position to a rearward position within the valve passage, the valve slider having a first annular groove formed on an outer surface thereof, the first annular groove having a forward wall, a rear wall and a transverse wall between the forward wall and the rear wall;
a first floating seal positioned in the first annular groove of the valve slider, the first floating seal being a smaller dimension than the first annular groove, the first floating seal sized to contact one of the forward wall and rear wall of the first annular groove without contacting the other of the forward wall and the rear wall of the first annular groove;
the valve slider including a hollow cavity portion, the hollow cavity portion including an inner surface forming a second annular groove, the second annular groove having a forward wall, a rear wall and a transverse wall between the forward wall and the rear wall; and,
a second floating seal positioned in the second annular groove of the hollow cavity portion, the second floating seal being a smaller dimension than the second annular groove, the second floating seal sized to contact one of the forward wall and rear wall of the second annular groove without contacting the other of the forward wall and the rear wall of the second annular groove,
wherein selective movement of the valve slider controls the flow of compressed gas between the valve passage and the breech.
2. The flow control and valving device for a compressed gas gun according to claim 1 , further comprising:
a guide stem positioned within the housing, the bolt positioned to move along the guide stem, the bolt opening a gas flow passage between the rear of the breech and the gas passage of the bolt when the bolt reaches its forward position.
3. The flow control and valving device for a compressed gas gun according to claim 1 , wherein the first floating seal is sized to contact the inner wall of the valve passage while contacting one of the forward wall and the rear wall.
4. The flow control and valving device for a compressed gas gun according to claim 3 , wherein the first floating seal is sized so as not to contact the transverse wall of the first annular groove.
5. The flow control and valving device for a compressed gas gun according to claim 1 , further comprising:
a guide stem provided in the valve passage, the guide stem received within the hollow cavity portion, wherein the second floating seal is sized to contact the guide stem while contacting one of the forward wall and the rear wall.
6. The flow control and valving device for a compressed gas gun according to claim 5 , wherein the second floating seal is sized so as not to contact the transverse wall of the second annular groove.