Frictionless piston pump

Claim 1

IN A RECIPROCATING PUMP HAVING A BODY, AN INLET FOR SAID BODY, AN OUTLET FOR SAID BODY, AN INLET CHAMBER COMMUNICATING WITH SAID INLET, AN OUTLET CHAMBER COMMUNICATING WITH SAID OUTLIET, A PRESSURE CHAMBER, VALVE MEANS FOR CONTROLLING THE FLOW OF FLUID BETWEEN SAID INLET CHAMBER AND SAID PRESSURE CHAMBER AND BETWEEN SAID PRESSURE CHAMBER AND SAID OUTLET CHAMBER, A CYLINDER, THE IMPROVEMENT COMPRISING A PISTON SLIDABLY MOUNTED FOR RECIPROCAL MOVEMENT IN SAID CYLINDER AND PARTIALLY DEFINING SAID PRESSURE CHAMBER, SAID PISTON BEING OPERATIVE UPON RECIPROCATION TO VARY THE VOLUME OF SAID PRESSURE CHAMBER THUS DRAWING FLUID FROM SAID INLET CHAMBER AND DISCHARGING SAID FLUID UNDER PRESSURE INTO SAID OUTLET CHAMBER, SAID PISTON BEING COMPRISED OF A PLURALITY OF TELE-SCOPICALLY NESTED SECTIONS EACH MOVABLE A PREDETERMINED LIMITED EXTENT WITH RESPECT TO ADJACENT SECTIONS.