Pumps – Condition responsive control of pump drive motor – By controlling drive motor motive fluid
Patent
1994-10-17
1996-12-17
Thorpe, Timothy
Pumps
Condition responsive control of pump drive motor
By controlling drive motor motive fluid
417393, 417395, 91313, 91315, 91281, 137102, I04B 4900, I04B 4306
Patent
active
055846661
ABSTRACT:
Provision is made for an air control valve to bypass the ice forming exhaust of a reciprocating pressure activation chamber in a reciprocating double diaphragm pump utilizing the supply pressure to close a check valve in line between the valve and the chamber which is then opened to exhaust by exhaust fluid flow from the chamber.
REFERENCES:
patent: 3304126 (1967-02-01), Rupp et al.
patent: 3791768 (1974-02-01), Wanner
patent: 3838946 (1974-10-01), Schall
patent: 3850082 (1974-11-01), Nussbaumer
patent: 4524803 (1985-06-01), Stoll et al.
patent: 4854832 (1989-08-01), Gardner et al.
patent: 5232352 (1993-08-01), Robinson et al.
patent: 5277555 (1994-01-01), Robinson
patent: 5326234 (1994-07-01), Versaw et al.
Elfers Robert C.
Kozumplik, Jr. Nicholas
Ingersoll-Rand Company
Thai Xuan M.
Thorpe Timothy
Vliet Walter C.
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