Pumps – Successive stages – With interstage discharge or additional discharge from...
Patent
1995-01-12
1996-11-19
Thorpe, Timothy S.
Pumps
Successive stages
With interstage discharge or additional discharge from...
417259, F04B 300
Patent
active
055756271
ABSTRACT:
A pump includes a high pressure portion and a low pressure portion. During low pressure, high volume operation, pressure produced in the high pressure portion of the pump is applied to drive a large area piston in the low pressure portion of the pump. Once the pressure in the high pressure portion of the pump raises to a cut-off pressure, at which time it takes excessive power to drive the large area piston, a cut-off valve opens to allow the high pressure portion of the pump to directly pump a relatively lower volume of fluid per stroke at a relatively higher pressure.
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Vairin Ken
Vairin Scott
Culbertson Russell D.
HyVair Corporation
Thorpe Timothy S.
Wicker William
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