Two-stage air powered pump
OwnerMicah L. Digmaninventor
Life of this patent
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Abstract
A two-stage air powered hydraulic pump has a portion of the air pressure that operates the pump diverted directly to the reservoir. The air pressure on the reservoir presses hydraulic fluid in the reservoir out of the reservoir, through the pumping chamber and to the load to quickly advance the load under low load conditions and to pre-charge the pumping chamber.
Claims6
In an air powered hydraulic pump of the type having an air pressure input port, a hydraulic pressure port and a reservoir of hydraulic fluid, the improvement wherein a portion of the pressurized air input to the pump is diverted to the reservoir so as to pressurize the fluid in the reservoir and press it out of the pump through the hydraulic pressure output port.
Dependencies are inferred from the claim text.