Fluid operating apparatus

Claim 1

A ROTATING, LINEARLY RECIPROCATING FLUID HANDLING APPARATUS, COMPRISING IN COMBINATION (A) A STATIONARY FLUID-TIGHT ENCLOSURE; (B) A PISTON HAVING ROTATING FLUID PORTS ASSOCIATED THEREWITH AND BEING CAPABLE OF BEING RECIPROCATED WITHIN SAID STATIONARY ENCLOSURE TO DEFINE THEREIN A FLUID CHAMBER OF VARIABLE VOLUME; (C) FLUID INLET AND OUTLET PORTS IN SAID STATIONARY ENCLOSURE; (D) ELECTROMAGNETIC LINEAR ACTUATING MEANS DIRECTLY AFFIXED TO SAID PISTON AND ADAPTED TO IMPART LINEAR RECIPROCATING MOTION TO SAID PISTON AND TO INTERACT WITH THE PRESSURE FORCES OF SAID FLUID IN SAID FLUID CHAMBER; (E) AN ELASTIC MEMBER CONNECTED TO SAID LINEAR ACTUATING MEANS AND ADAPTED TO PROVIDE SAID PISTON AND SAID LINEAR ACTUATING MEANS THOSE ACCELERATION FORCES REQUIRED FOR RECIPROCATING SAID PISTON WHICH ARE NOT PROVIDED BY FLUID IN SAID FLUID CHAMBER AND SAID LINEAR ACTUATING MEANS AND FURTHER TO PROVIDE WHATEVER AVERAGE FORCE IS REQUIRED TO COUNTERBALANCE ANY AVERAGE DIFFERENCE BETWEEN THE FORCES DELIVERED BY SAID LINEAR ACTUATING MEANS AND THOSE ABSORBED FROM SAID FLUID; AND (F) ROTARY ACTUATING MEANS ADAPTED TO ROTATE SAID ROTATING FLUID PORTS RELATIVE TO SAID FLUID INLET AND OUTLET PORTS, SAID LINEAR AND SAID ROTARY ACTUATING MEANS BEING SYNCHRONIZED WHEREBY THE RECIPROCATING MOTION OF SAID PISTON AND THE RELATIVE ROTARY MOTION OF SAID ROTATING PORTS CONTROL THE FLOW OF FLUID IN AND OUT OF SAID FLUID CHAMBER.