Fluid pressure device with dual feed and exhaust

Claim 1

A ROTARY FLUID PRESSURE DEVICE COMPRIISNG A CASING, FLUID INLET AND OUTLET MEANS, A RING MEMBER DEFINING A CHAMBER AND HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED INTERNAL TEETH, A COOPERATING EXTERNALLY TOOTHED STAR MEMBER HAVING FEWER TEETH THAN SAID RING MEMBER DISPOSED ECCENTRICALLY RELATIVE TO THE AXIS OF SAID RING MEMBER, ONE OF SAID MEMBERS HAVING ROTATIONAL MOVEMENT ABOUT ITS OWN AXIS AND ONE OF SAID MEMBERS HAVING ORBITAL MOVEMENT ABOUT THE AXIS OF THE OTHER OF SAID MEMBERS WITH THE TEETH OF SAID MEMBERS INTERMESHING IN SEALING ENGAGEMENT TO FORM EXPANDING CELLS ON ONE SIDE OF THE LINE OF ECCENTRICITY AND CONTRACTING CELLS ON THE OTHER SIDE OF SAID LINE DURING RELATIVE MOVEMENT BETWEEN SAID MEMBERS, A VALVE ROTATABLY DISPOSED IN SAID CASING, DRIVE MEANS CONNECTING SAID VALVE TO ONE OF SAID MEMBERS FOR ROTATION OF SAID VALVE IN SYNCHRONISM WITH ONE OF SAID MOVEMENTS OF ONE OF SAID MEMBERS, SAID VALVE HAVING FLUID FEEDING PASSAGES IN FLUID COMMUNICATION WITH SAID FLUID INLET MEANS AND FLUID EXHAUSTING PASSAGES IN FLUID COMMUNICATION WITH SAID FLUID OUTLET MEANS, SAID CASING HAVING TWO SETS OF PASSAGES COMMUNICATING WITH SAID RING CHAMBER AT POINTS BETWEEN SAID RING MEMBER TEETH, SAID PASSAGES HAVING CIRCUMFERENTIALLY ARRANGED OPENINGS FOR FLUID COMMUNICATION WITH SAID FLUID FEEDING AND EXHAUSTING PASSAGES OF SAID VALVE TO EFFECT COMMUNICATION BETWEEN SAID INLET MEANS AND SAID EXPANDING CELLS ON ONE SIDE OF SAID LINE OF ECCENTRICITY AND BETWEEN SAIJD OUTLET MEANS AND SAID CONTRACTING CELLS ON THE OTHER SIDE OF SAID LINE OF ECCENTRICITY DURING ROTATION OF SAID VALVE, SAID OPENINGS OF SAID FIRST SET OF PASSAGES BEING ALTERNATELY ARRANGED RELATIVE TO SAID OPENINGS OF SAID SECOND SET OF PASSAGES WITH EACH OF SAID OPENINGS IN ONE OF SAID SETS OF PASSAGES FORMING A PAIR WITH AND BEING DISPOSED ON DIAMETRICALLY OPPOSITE SIDES OF SAID CASING FROM ONE OF SAID PASSAGE OPENINGS OF THE OTHER OF SAID SETS OF PASSAGES, THE PASSAGES OF EACH OF SAID PAIR OF OPENINGS HAVING COMMUNICATION WITH SAID CHAMBER BETWEEN THE SAME PAIR OF ADJACENT RING MEMBER TEETH.