Pneumatic instrument particle trap
First Claim
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1. A transducer which receives a pressurized gas supply and an electric control input to provide a regulated pneumatic output as a function of the electric control input, comprising:
- a housing having a passage therein, the passage including an inlet for receiving at least a portion of the pressurized gas supply and an outlet;
a gas regulator including a regulator nozzle receiving gas from the outlet and a displaceable deflector responsive to the electric control input and cooperating with the regulator nozzle to provide the regulated pneumatic output; and
a particle trap disposed in the passage and including a trap plate and a trap nozzle, the trap nozzle directing gas against the trap plate.
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Abstract
A transducer which provides a regulated pneumatic output as a function of an electric control input includes a housing, a gas regulator, and a particle trap. The housing has a passage therein, the passage including an inlet for receiving a pressurized gas supply and an outlet. The particle trap is disposed in the passage and includes a trap plate and a trap nozzle which directs gas against the trap plate so as to remove undesired entrained particles from the gas before it reaches the gas regulator.
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Citations
15 Claims
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1. A transducer which receives a pressurized gas supply and an electric control input to provide a regulated pneumatic output as a function of the electric control input, comprising:
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a housing having a passage therein, the passage including an inlet for receiving at least a portion of the pressurized gas supply and an outlet; a gas regulator including a regulator nozzle receiving gas from the outlet and a displaceable deflector responsive to the electric control input and cooperating with the regulator nozzle to provide the regulated pneumatic output; and a particle trap disposed in the passage and including a trap plate and a trap nozzle, the trap nozzle directing gas against the trap plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An I/P transducer for providing a regulated pressure output in response to an electrical input signal, comprising:
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a housing having a passage; inlet means coupled to the passage for receiving pressurized gas from a pressurized gas source and conducting the pressurized gas to the passage; outlet means coupled to the passage for expelling the pressurized gas; gas regulator means, coupled to the outlet means, for receiving the electrical input signal and selectively altering flow of the pressurized gas as a function of the electrical input signal to provide the regulated pressure output; a particle trap plate disposed in the passage and partially blocking the passage; and a particle trap nozzle disposed in the passage upstream from the particle trap plate, the particle trap nozzle directing pressurized gas toward the particle trap plate; whereby sticky particles carried in the pressurized gas are ejected from the particle trap nozzle toward the particle trap plate and adhere to the particle trap plate, and the pressurized gas flows past the particle trap plate.
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14. A transducer which receives a pressurized gas supply and an electric control input to provide a regulated pneumatic output as a function of the electric control input, comprising:
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a housing having a passage therein, the passage including an inlet for receiving at least a portion of the pressurized gas supply and an outlet; a gas regulator including a regulator nozzle receiving gas from the outlet and a displaceable deflector responsive to the electric control input and cooperating with the regular nozzle to provide the regulated pneumatic output; a trap surface; and a trap nozzle located in the passage and directing gas against the trap surface. - View Dependent Claims (15)
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Specification