Pumps – Motor driven – Fluid motor
Patent
1981-03-19
1984-03-27
Smith, Leonard E.
Pumps
Motor driven
Fluid motor
91 40, 91323, 91308, F04B 1700
Patent
active
044391145
ABSTRACT:
A fluid operated pumping system which includes a main power cylinder divided into a power chamber and a pump chamber by a reciprocally mounted power piston. An actuator piston is connected to the power piston for synchronous movement therewith and is reciprocably mounted in an actuator cylinder. A diaphragm type four-way transfer valve is interposed between a power fluid source and the main power cylinder and actuator cylinder, to both of which the valve is connected, and functions to alternately and cyclically charge power fluid at a relatively high pressure to the power cylinder and actuator cylinder, and to concurrently discharge power fluid at a relatively low pressure. The system further includes a needle valve controlled, diaphragm-type, astable pneumatic amplifier which is connected to, and controls the movement of, the transfer valve. A check valve subassembly is associated with the pump chamber of the main power cylinder for concurrently pumping a secondary fluid at a relatively high discharge pressure.
REFERENCES:
patent: 343569 (1886-06-01), Cooper
patent: 1893440 (1933-01-01), Pagliuchi
patent: 2904011 (1959-09-01), Miley
patent: 2990910 (1961-07-01), Kimmell
patent: 3133472 (1964-05-01), Zollinger, Sr.
patent: 3135210 (1964-06-01), English
patent: 3387563 (1968-06-01), Williams et al.
patent: 4229143 (1980-10-01), Pucher
Laney William R.
Smith Leonard E.
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