Gear pump

Claim 1

IN A GEAR PUMP STRUCTURE HAVING A BODY PROVIDED INTERNALLY WITH AN INLET PASSAGE AND AN OUTLET PASSAGE, A GEAR PUMP HAVING A SPILL FLOW, A VALVE MEANS AND SPEED RESPONSOVE MEANS OPERABLE DEPENDENT UPON THE SPEED OF THE GEAR PUMP TO CONTROL THE EXTENT OF SPILL FLOW, SAID GEAR PUMP HAVING FIRST AND SECOND GEAR MEMBERS WHICH ARE IN MESH WITH EACH OTHER AND ARE DISPOSED BETWEEN SAID INLET AND OUTLET PASSAGES, THE BODY HAVING SURFACES DISPOSED ADJACENT TO THE FIRST AND SECOND GEAR MEMBERS, MEANS FOR ROTATING THE GEAR MEMBERS SO AS TO CAUSE LIQUID SUPPLIED TO THE INLET PASSAGE TO BE PUMPED TO THE OUTLET PASSAGE AS A MAIN FLOW OF LIQUID VIA THE SPACES BETWEEN THE RESPECTIVE GEAR MEMBERS AND THE SAID SURFACES, THE FIRST GEAR MEMBER HAVING AN AXIAL PASSAGE AND PROVIDED WITH AN ANNULAR SERIES OF ANGULARLY SUBSTANTIALLY EQUIPMENTALY SPACED APART AND AXIALLY COPLANAR RADIAL PASSAGES THEREIN FOR SPILL FLOW, THE AXIAL PASSAGE BY MEANS OF ITS END REMOTE TO SAID RADIAL PASSAGES COMMUNICATING WITH THE INLET PASSAGE, AND EACH RADIAL PASSAGE EXTENDING FROM ADJACENT THE OTHER END OF THE AXIAL PASSAGE TO THE ROOT OF A TOOTH SPACE OF THE FIRST GEAR MEMBER, WHEREBY, DURING THE PASSAGE OF THE SAID MAIN FLOW FROM THE INLET PASSAGE TO THE OUTLET PASSAGE AND SPILL FLOW WILL AT ALL TIMES PASS FROM THE OUTLET PASSAGE AND VIA THE AXIAL PASSAGE AND ALL THE RADIAL PASSAGES BACK TO THE INLET PASSAGE, SAID VALVE MEANS BEING A MEMBER WHICH IS AXIALLY MOVABLE IN THE SAID AXIAL PASSAGE ACROSS THE ADJACENT ENDS OF THE RADICAL PASSAGES TO VARY THE EXTENT OF OPENING AND/OR CLOSING OF SUCH PASSAGE TO REGULATE SPILL FLOW.