Pumps – Condition responsive control of pump drive motor – By controlling drive motor motive fluid
Patent
1994-11-08
1997-04-01
Thorpe, Timothy
Pumps
Condition responsive control of pump drive motor
By controlling drive motor motive fluid
417346, 417342, 417393, 417397, 417401, 91295, F04B 4900, F04B 1700
Patent
active
056160054
ABSTRACT:
An apparatus comprising a pair of fluid driven pump assemblies in a back-to-back configuration to yield a bi-directional pump. Each of the pump assemblies includes a piston or diaphragm which divides a chamber therein to define a power section and a pumping section. An intake-exhaust valve is connected to each of the power sections of the pump chambers, and function to direct fluid, such as compressed air, into the power section and exhaust fluid therefrom. At least one of the pistons or diaphragms is connected by a rod assembly which is constructed to define a signal valve, whereby the intake-exhaust valve of one pump assembly is controlled by the position or location of the piston or diaphragm in the other pump assembly through the operation of the rod assembly signal valve. Each of the pumping sections of the pump assemblies are provided with intake and exhaust valves to enable filling of the pumping section with fluid and discharging fluid therefrom when a desired pressure has been reached.
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AIAA 93-2121, Bipropellant Propulsion With Reciprocating Pumps, J.C. Whitehead, Jun. 28-30, 1993.
Carnahan L. E.
Regents of the University of California
Sartorio Henry P.
Thai Xuan M.
Thorpe Timothy
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