초록 ▼

A valve for paint ball guns includes a case for receiving a first piston rod therein in which a first end of a second piston rod is movably received. The case includes several chambers defined therein so as to introduce pressurized air into the barrel of the paint ball gun. The first piston rod incl

A valve for paint ball guns includes a case for receiving a first piston rod therein in which a first end of a second piston rod is movably received. The case includes several chambers defined therein so as to introduce pressurized air into the barrel of the paint ball gun. The first piston rod includes two piston rings and one of which is larger than the other. The first piston rod is biased by a first spring. The first end of the second piston rod in the first piston rod is biased by a second spring which is easily overcome by pushing the second piston rod by a driving member. The movement of the second piston rod introduces pressurized air to apply to the piston ring of larger area to generate a force to overcome the force from the first spring and the piston ring of the smaller area.

대표청구항 ▼

What is claimed is: 1. A valve for paint ball guns, comprising: a case having a first chamber, a second chamber and a third chamber defined in the case, an inlet and an outlet respectively through a wall of the case, the inlet communicating with the first chamber and the outlet communicating with t

What is claimed is: 1. A valve for paint ball guns, comprising: a case having a first chamber, a second chamber and a third chamber defined in the case, an inlet and an outlet respectively through a wall of the case, the inlet communicating with the first chamber and the outlet communicating with the second chamber; a first piston rod being a hollow and tubular member and received in the case, a first piston ring mounted to the first piston rod and movable between a first position and a second position thereof, the first piston ring sealing communication between the first and second chambers when the first piston ring is in the first position, the first and second chambers being in communication with each other when the first piston ring is in the second position; a second position ring connected to the first piston rod and separating the second and third chambers, a fourth chamber defined in the first piston rod and communicating with the third chamber; a second piston rod having a first end received in the first piston rod, an introduction hole defined through a wall of the first piston rod and communicating with the fourth chamber, a third piston ring connected to the second piston rod and located in the fourth chamber, the third piston ring being movable between a first position and a second position, the introduction hole being sealed by the third piston ring when the third piston ring is at the first position thereof, the introduction hole being opened by the third piston ring when the third piston ring is at the second position thereof, and a driving member pushing a second end of the second piston rod to move the second piston rod from the first position to the second position thereof so that pressurized air in the first chamber enters into the fourth chamber and the third chamber via the introduction hole to move the first piston rod from the first position to the second position thereof. 2. The valve as claimed in claim 1, wherein the case includes two open ends and an end cap is engaged with and seals one of the two open ends, a spring has one end contacting the end cap and the other end of the spring is mounted to the first piston rod and biases the first piston ring, a ring-shaped member is engaged with the other open end of the case and the second end of the second piston rod extends through the ring-shaped member. 3. The valve as claimed in claim 2, wherein an annular passage is defined between the second piston rod and an inner periphery of the ring-shaped member. 4. The valve as claimed in claim 1, wherein an area of the second piston ring is larger than that of an end surface of the first piston rod, an area of the first piston rod is larger than that of an end surface of the second piston rod, an area of the second piston rod in the fourth chamber is 10% to 50% of an end surface of the first piston rod in the first chamber. 5. The valve as claimed in claim 1, wherein a second spring is located in the fourth chamber and biased between the third piston ring and a fourth piston ring engaged with an end of the first piston rod. 6. A paint ball gun comprising: a barrel and a valve, the valve having a case which has a first chamber, a second chamber and a third chamber defined therein, an inlet and an outlet respectively through a wall of the case, the inlet communicating with the first chamber and the outlet communicating with the second chamber; a first piston rod being a hollow and tubular member and received in the case, a first piston ring mounted to the first piston rod and movable between a first position and a second position thereof, the first piston ring sealing communication between the first and second chambers when the first piston ring is in the first position, the first and second chambers being in communication with each other when the first piston ring is in the second position; a second position ring connected to the first piston rod and separating the second and third chambers, a fourth chamber defined in the first piston rod and communicating with the third chamber; a second piston rod having a first end received in the first piston rod, an introduction hole defined through a wall of the first piston rod and communicating with the fourth chamber, a third piston ring connected to the second piston rod and located in the fourth chamber, the third piston ring being movable between a first position and a second position, the introduction hole being sealed by the third piston ring when the third piston ring is at the first position thereof, the introduction hole being opened by the third piston ring when the third piston ring is at the second position thereof, and a driving member pushing a second end of the second piston rod to move the second piston rod from the first position to the second position thereof so that pressurized air in the first chamber enters into the fourth chamber and the third chamber via the introduction hole to move the first piston rod from the first position to the second position thereof. 7. The valve as claimed in claim 6, wherein the barrel is located above the valve. 8. The valve as claimed in claim 6, wherein the case includes two open ends and an end cap is engaged with and seals one of the two open ends, a spring has one end contacting the end cap and the other end of the spring is mounted to the first piston rod and biases the first piston ring, a ring-shaped member is engaged with the other open end of the case and the second end of the second piston rod extends through the ring-shaped member. 9. The valve as claimed in claim 8, wherein an annular passage is defined between the second piston rod and an inner periphery of the ring-shaped member. 10. The valve as claimed in claim 6, wherein an area of the second piston ring is larger than that of an end surface of the first piston rod, an area of the first piston rod is larger than that of an end surface of the second piston rod, an area of the second piston rod in the fourth chamber is 10% to 50% of an end surface of the first piston rod in the first chamber. 11. The valve as claimed in claim 6, wherein a second spring is located in the fourth chamber and biased between the third piston ring and a fourth piston ring engaged with an end of the first piston rod.