Rotating-cam vane pump

Claim 1

IN A ROTATING-CAM VANE PUMP, THE COMBINATION OF: (A) A HOUSING PROVIDED THEREIN WITH A CYLINDRICAL PUMPING CHAMBER OPEN AT ONE END; (B) A CAM IN AND ROTATABLE ABOUT THE AXIS OF SAID PUMPING CHAMBER AND HAVING AXIALLY SPACED END WALLS AND A PERIPHERAL WALL; (C) A SHAFT ROTATABLE RELATIVE TO SAID HOUSING ABOUT THE AXIS OF SAID PUMPING CHAMBER AND CONNECTED TO SAID CAM TO ROTATE SAME; (D) CIRCUMFERENTIALLY SPACED, DISPLACEABLE VANES CARRIED BY SAID HOUSING AND EXTENDING INWARDLY INTO SAID PUMPING CHAMBER AND INTO ENGAGEMENT WITH SAID PERIPHERAL WALL OF SAID CAM; (E) SAID CAM ALTERNATELY INCREASING AND DECREASING THE VOLUMES OF THE SPACES BETWEEN SAID VANES AS IT ROTATES; (F) INLET PASSAGE MEANS IN SAID CAM FOR DELIVERING FLUID TO BE PUMPED TO THE INTERVANE SPACES AS THE VOLUMES THEREOF ARE INCREASED; (G) SAID INLET PASSAGE MEANS HAVING AN INLET END FORMED IN ONE OF SAID END WALLS OF SAID CAM, AND HAVING AN OUTLET END IN SAID PERIPHERAL WALL OF SAID CAM; (H) AN OUTLET VALVE PLATE ON ONE END OF AND EXTENDING RADIALLY OUTWARDLY FROM AND ROTATABLE WITH SAID CAM; (I) THE PERIPHERY OF SAID OUTLET VALVE PLATE CLOSING SAID OPEN END OF SAID PUMPING CHAMBER; (J) AN OUTLET OPENING IN SAID OUTLET VALVE PLATE RADIALLY OUTWARDLY FROM SAID CAM, SAID OUTLET OPENING RECEIVING FLUID BEING PUMPED FROM THE INTERVANE SPACES AS THE VOLUMES THEREOF ARE DECREASED; (K) OUTLET PASSAGE MEANS IN SAID HOUSING ON THE OPPOSITE SIDE OF SAID OUTLET VALVE PLATE FROM SAID PUMPING CHAMBER AND COMMUNICATING WITH SAID OUTLET OPENING IN SAID OUTLET VALVE PLATE; (I) AN INLET PORT IN SAID HOUSING AND COMMUNICATING WITH SAID INLET END OF SAID INLET PASSAGE MEANS; AND (M) AN OUTLET PORT IN SAID HOUSING AND COMMUNICATING WITH SAID OUTLET PASSAGE MEANS.