Here is disclosed a reusable pneumatic distraction device having a housing which encloses a first and a second gas reservoir which are configured to contain a quantity of high and low pressure gas, respectively. A valve member seals off an exhaust in the first gas reservoir, the valve member movable
Here is disclosed a reusable pneumatic distraction device having a housing which encloses a first and a second gas reservoir which are configured to contain a quantity of high and low pressure gas, respectively. A valve member seals off an exhaust in the first gas reservoir, the valve member movable between a closed position sealing the exhaust and an open position. The device also includes a pneumatic drive for urging the valve towards its opened position. The pneumatic drive configured to apply a lower urging force followed by a larger urging force as the valve opens. The device is also provided with a lock pin releasably coupled to the valve for preventing the valve from moving towards its open position. Finally, the device includes a delay mechanism to delay the opening of the piston when the lock pin is released.
대표청구항▼
1. A reusable pneumatic distraction device comprising: a. A housing enclosing a cavity divided into first and second gas reservoirs configured to store a quantity of higher pressure and lower pressure gas, respectively, the first gas reservoir being coupled to an exhaust port, a valve member interpo
1. A reusable pneumatic distraction device comprising: a. A housing enclosing a cavity divided into first and second gas reservoirs configured to store a quantity of higher pressure and lower pressure gas, respectively, the first gas reservoir being coupled to an exhaust port, a valve member interposed between the first gas reservoir and the exhaust, the valve member movable between a closed position wherein the valve member seals off the exhaust and an open position wherein gas is free to rapidly flow out of the exhaust;b. A valve stem having opposite first and second ends, the valve being coupled to the first end and a piston being formed on the valve stem between the valve and the second end, the piston and the first and second gas reservoirs being dimensioned and configured such that the piston divides the first gas reservoir from the second gas reservoir;c. The second gas reservoir having a cylindrical wall dimensioned to receive the piston, the piston having a seal for contacting the cylindrical wall, the cylindrical wall having a narrower portion towards the first gas reservoir;d. A lock pin mounted coupled to the valve stem for holding the valve in its closed position;e. A discharge opening formed on the housing and communicating with the second gas reservoir, the flow of gas through the discharge opening being slowed by a porous plug contained in the discharge opening;f. The piston and the second gas reservoir being configured such that when the lock pin is released, the piston is urged to move the valve towards its open position as a result of a difference in gas pressure between the first and second gas reservoirs applying a pneumatic force on the valve, the second gas reservoir being configured such that the effective diameter of the piston increases and the pneumatic force increases as the valve moves out of its closed position, the porous plug being configured to slow the escape of gas from the second gas reservoir and thereby slow the movement of the piston. 2. A reusable pneumatic distraction device comprising: a. A housing enclosing first and second gas reservoirs, the first gas reservoir configured to contain a quantity of high pressure gas and the second gas reservoir configured to contain a quantity of lower pressure gas, a valve member sealing off an exhaust in the first gas reservoir, the valve member movable between a closed position wherein the valve member seals the exhaust closed and an open position wherein gas is free to rapidly flow out of the exhaust;b. A piston coupled to the valve and interposed between the first and second gas reservoirs, the second gas reservoir having a cylindrical wall dimensioned to receive the piston, the piston having a seal for contacting the cylindrical wall, the cylindrical wall having a narrower portion towards the first gas reservoir, the piston applying a pneumatic force on the valve urging the valve towards its opened position by a difference in gas pressure between the first and second gas reservoirs, the second gas reservoir being configured such that the effective diameter of the piston increases and the pneumatic force increases as the valve moves out of its closed position;c. A lock pin releasably coupled to the valve for preventing the valve from moving towards its open position;d. A porous plug blocking a discharge opening in the second gas reservoir to slow the depressurization of the second gas reservoir and thereby slow the movement of the piston when the lock pin is released. 3. The reusable pneumatic distraction device of claim 1 wherein the housing has a collar with a smooth bore through which the second end of the valve stem passes, a seal formed on the second end of the valve stem to prevent gas from escaping through the collar, the seal passing from a first portion of the bore to a second portion of the bore as the valve is moved towards its open position, the second portion of the bore being wider than the seal to permit the rapid depressurization of the second gas reservoir and subsequent rapid opening of the valve when the seal moves to the second portion of the bore. 4. The reusable pneumatic distraction device of claim 2 wherein the valve is coupled to the piston by a valve stem having opposite first and second ends, the valve being formed on the first end and the piston being formed on the valve stem between the first and second ends, the housing having a collar with a smooth bore through which the second end of the valve stem passes, a seal formed on the second end of the valve stem to prevent gas from escaping through the collar, the seal passing from a first portion of the bore to a second portion of the bore as the valve is moved towards its open position, the second portion of the bore being wider than the seal to permit the rapid depressurization of the second gas reservoir and subsequent rapid opening of the valve when the seal moves to the second portion of the bore. 5. The distraction device of claim 1 further comprising a removal cap coupled to the housing at the exhaust, the removable cap dimensioned to cover over the exhaust, the removable cap having a diaphragm configured to burst loudly when gas rapidly passes through the exhaust. 6. The distraction device of claim 2 further comprising a removal cap coupled to the housing at the exhaust, the removable cap dimensioned to cover over the exhaust, the removable cap having a diaphragm configured to burst loudly when gas rapidly passes through the exhaust. 7. The distraction device of claim 1 wherein the first and second reservoirs and the exhaust are all coaxially aligned, the exhaust comprising a first cylindrical passage formed in the housing and the second reservoir comprising a second cylindrical passage formed in the housing, the valve having a diameter dimensioned to slide within the first cylindrical passage, the piston having a diameter dimensioned to slide within the second cylindrical passage, the diameter of the piston being slightly greater than the diameter of the valve. 8. The distraction device of claim 7 further comprising a removable cap coupled to the housing at the exhaust, the removable cap dimensioned to cover over the exhaust, the removable cap having a diaphragm configured to burst loudly when gas rapidly passes through the exhaust. 9. The distraction device of claim 4 wherein the first and second reservoirs and the exhaust are all coaxially aligned, the exhaust comprising a first cylindrical passage formed in the housing and the second reservoir comprising a second cylindrical passage formed in the housing, the valve having a diameter dimensioned to slide within the first cylindrical passage, the piston having a diameter dimensioned to slide within the second cylindrical passage, the diameter of the piston being slightly greater than the diameter of the valve. 10. The distraction device of claim 9 further comprising a removable cap coupled to the housing at the exhaust, the removable cap dimensioned to cover over the exhaust, the removable cap having a diaphragm configured to burst loudly when gas rapidly passes through the exhaust.
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이 특허에 인용된 특허 (8)
Hamilton James E. (Tallahasse FL), Non-lethal distraction device.
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