Inventors:
Scott Vairin - Houston TX
Ken Vairin - Irving TX
Assignee:
HyVair Corporation - Houston TX
International Classification:
F04B 300
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.