Gear type pump or motor

Claim 1

IN A DEVICE OF THE CLASS DESCRIBED, A HOUSING DEFINING A CHAMBER CLOSED EXCEPT FOR A LATERAL PRESSURE PORT AND A SECOND PORT, A PAIR OF GEARS DISPOSED IN SAID CHAMBER FOR ROTATION ABOUT PARALLEL AXES WHICH ARE OPPOSITELY SPACED FROM THE AXIS OF SAID PRESSURE PORT AND WHICH ARE LOCATED IN A COMMON PLANE PERPENDICULAR TO THE AXIS OF SAID PRESSURE PORT, SAID GEARS MESHING IN A REGION ALIGNED WITH THE AXIS OF SAID PRESSURE PORT, A WEAR BLOCK DISPOSED BETWEEN SAID PORT AND SAID GEARS, HAVING A PASSAGE THERETHROUGH COAXIAL WITH SAID PRESSURE PORT AND FORMED WITH ARCUATE SURFACES RESPECTIVELY CONFRONTING AND CONFORMING TO THE PERIPHERIES OF SAID GEARS ADJACENT SAID MESHING REGION, SAID ARCUATE SURFACES EXTENDING SIGNIFICANTLY BEYOND THE OPPOSITE AXIAL ENDS OF SAID GEARS, A FIRST WEAR PLATE AND A SECOND WEAR PLATE RESPECTIVELY BEARING ON THE OPPOSITELY AXIAL ENDS OF SAID GEARS, EACH OF SAID WEAR PLATES TRAVERSING SAID COMMON PLANE, SPANNING SAID MESHING REGION AND BEING FORMED TO PROVIDE, ADJACENT ONE END, FLARING SURFACES CONFRONTING AND CONFORMING TO ONE EXTENDING PORTION OF SAID ARCUATE SURFACES OF SAID WEAR BLOCK AND ABUTMENT MEANS RESTRICTING MOVEMENT OF SAID WEAR PLATES AWAY FROM SAID WEAR BLOCK.