Pump device

Details Pump device Pump device

1984-05-15

1985-12-10

Smith, Leonard E.

Rotary expansible chamber devices

Apertured bypass to pressurize or relieve working chamber...

418259, 417540, F04C 1800, F04B 1100

Patent

active

045576785

ABSTRACT:
A pump device comprises a housing having an air intake port and an air discharge port, and with its inner peripheral surface being formed in a cylindrical shape; a rotor mounted in said housing and rotating eccentrically in said housing; a plurality of vanes mounted in said rotor and getting into slide-contact with the inner peripheral surface of said housing with rotation of said rotor so as to send under pressure the gas from said air intake port to said air discharge port; a communicating port defined by said vane, the inner peripheral surface of said housing, and the outer peripheral surface of said rotor, and communicatively connected with said operating chamber; and a gas storing chamber for sending and receiving the gas between it and said operating chamber through said communicating port to reduce a pressure differential in said air discharge port and said operating chamber.

REFERENCES:
patent: 2966860 (1961-01-01), Maynard
patent: 3121529 (1964-02-01), Hubrich
patent: 3312387 (1967-04-01), Cassidy
patent: 3320899 (1967-05-01), Von Thuengen

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