Automatically reversible gear pump

Claim 1

IN AN AUTOMATICALLY REVERSIBLE GEAR PUMP MECHANISM, THE COMBINATION OF A ROTATABLE INTERNALLY TOOTHED FIRST GEAR; AXIALLY MOVABLE SUPPORTING MEANS; A GEAR CARRIER HAVING AN AXIS PARALLEL TO AND SPACED FROM THE AXIS OF SAID FIRST GEAR SUPPORTED ON SAID SUPPORTING MEANS; AN EXTERNALLY TOOTHED SECOND GEAR ROTATABLY POSITIONED ON SAID GEAR CARRIER IN MESHING ENGAGEMENT WITH SAID FIRST GEAR, SAID FIRST AND SECOND GEARS WHEN ROTATED FORMING INTAKE AND EXHAUST SPACES THEREBETWEEN; MEANS FOR ROTATING SAID FIRST GEAR; SUCTION PORT MEANS IN SAID SUPPORTING MEANS OPPOSITE THE INTAKE SPACE FORMED BY SAID FIRST AND SECOND GEARS; DISCHARGE PORT MEANS IN SAID SUPPORTING MEANS OPPOSITE THE DISCHARGE SPACE FORMED BY SAID FIRST AND SECOND GEARS; SAID GEAR CARRIER BEING ROTATABLE RELATIVE TO SAID SUPPORTING MEANS SO THAT, UPON ROTATION OF SAID FIRST GEAR ROTATING MEANS IN A REVERSE DIRECTION; TOOTH PRESSURES DEVELOPED BETWEEN SAID FIRST AND SECOND GEARS ROTATE SAID GEAR CARRIER IN SAID REVERSE DIRECTION; AND STOP MEANS ON SAID SUPPORTING MEANS ENGAGEABLE WITH SAID GEAR CARRIER TO LIMIT ROTATION OF SAID GEAR CARRIER RELATIVE TO SAID SUPPORTING MEANS IN SAID REVERSE DIRECTION TO A PREDETERMINED ARC WHEREBY THE INTAKE AND EXHAUST SPACES FORMED BETWEEN SAID FIRST AND SECOND GEARS REMAIN SUBSTANTIALLY OPPOSITE SAID SUCTION AND DISCHARGE PORT MEANS.