Contamination free method and apparatus for transfer of pressure

Details Contamination free method and apparatus for transfer of pressure Contamination free method and apparatus for transfer of pressure

1981-03-06

1984-09-18

Cohan, Alan

Fluid handling

Processes

Involving pressure control

137240, 417392, 417137, 92174, F04F 118

Patent

active

044717954

ABSTRACT:
A means and apparatus for transfer of pressure energy from a first fluid at high pressure to a second fluid at lower pressure via a piston mounted for free floating movement within a cylinder communicating on one side with the first fluid and at the other side with the second fluid and in which contamination of the second fluid by the first fluid is prevented during energy transfer by exposing the one side of the piston to clean fluid for substantial equalization of pressures on opposite sides of the piston before exposure of the piston to the first fluid at high pressure.

REFERENCES:
patent: 2232198 (1941-02-01), Ashworth
patent: 3168013 (1965-02-01), Williamson
patent: 3431747 (1969-03-01), Hashemi et al.
patent: 3489159 (1970-01-01), Cheng et al.
patent: 3730203 (1973-05-01), Katzer et al.

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