Valve control system for an air displacement type pump

Details Valve control system for an air displacement type pump Valve control system for an air displacement type pump

1990-04-05

1991-04-30

Smith, Leonard E.

Pumps

One fluid pumped by contact or entrainment with another

Liquid pumped by supplying or exhausting gaseous motive...

417141, 417507, 417120, F04F 102

Patent

active

050113763

ABSTRACT:
A valve control system for an air displacement type pump operates the inlet or outlet valve in accordance with the pressure differential between the inlet line and the main pump chamber or the outlet line and the main pump chamber respectively such that the inlet valve is open when the pressure in the pump chamber is less than the pressure in the inlet line and the outlet valve is opened when the pressure in the chamber is greater than the pressure in the outlet line.

REFERENCES:
patent: 1724855 (1929-08-01), Small
patent: 2383193 (1945-08-01), Herbert
patent: 2526801 (1950-10-01), Brown
patent: 2764104 (1956-09-01), Yeomans
patent: 2821930 (1958-02-01), Smith
patent: 2943578 (1960-07-01), McCombie
patent: 3266574 (1966-08-01), Gandy
patent: 3969041 (1976-07-01), Thausing et al.
patent: 4770610 (1988-09-01), Breckner

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