Pneumatic/hydraulic pressure actuated positive displacement pump

Abstract

Abstract A PNEUMATIC OR HYDRAULIC PRESSURE ACTUATED POSITIVE DISPLACEMENT PUMP OF RECIPROCATING TYPE WITH PISTON ASSEMBLY SHIFTABLE FROM ONE OPEN PUMP POSITION ENABLING PUMP PRIMING THROUGH THE VOID PROVIDED IN THE PUMP CHAMBER WHEN THE WORKING FLUID PRESSURE IS RELIEVED, INTO THE SECOND POSITION FOR PUMPING OUT THE CONTENTS TRAPPED IN SAID PUMP CHAMBER UPON THE APPLICATION OF THE WORKING FLUID TO THE OPPOSITE END OF SAID PISTON ASSEMBLY, AND SUBSEQUENT RETURN OF THE PISTON TO THE ORIGINAL POSITION WHEN SAID WORKING FLUID IS RELIEVED, BY THE SUCTION FORCE THAT IS GENERATED DURING THE FORWARD PISTON MOVEMENT WHEN IT IS ENERGIZED BY PRESSURE OF THE WORKING FLUID, PISTON ASSEMBLY COMPRISING ONE LARGE WORKING PISTON WITH U-CUP SEALS AT EXTREMITIES AND ORIENTED SO AS TO EXPAND UNDER PRESSURE FOR BETTER SEALING, AND TWO SMALLER PISTONS AT EACH END OF LARGE PISTON FACE, ONE FOR ACTING AS A SUCTION CUP TO RETURN PISTON ASSEMBLY TO THE ORIGINAL POSITION WHEN WORKING FLUID PRESSURE IS RELIEVED FROM THE PISTON ENERGIZATION PORT, INCLUDING APPROPRIATE SEALS, ANOTHER PISTON AT THE OPPOSITE END FOR PLUGGING-OFF FLUID PUMPED FROM THE SUPPLY SOURCE IN ORDER TO FACILITATE IMPROVED PUMPING WITH MINIMUM SLIPPAGE.

Inventors

• 👤 Richard S Pauliukonis

Bibliographic Details