Fluid pressure developing units

Claim 1

A PRESSURE DEVELOPING UNIT COMPRISING AN ELECTRIC MOTOR, SAID ELECTRIC MOTOR INCLUDING A STATOR AND A ROTOR, A PLURALITY OF BORES IN THE ROTOR EQUALLY SPACED FROM THE AXIS OF ROTATION OF THE ROTOR AND EXTENDING PARALLEL THERETO, A TUBULAR SLEEVE IN EACH OF SAID BORES, A PISTON IN EACH SLEEVE, EACH PISTON HAVING ONE END PROJECTING FROM ONE END OF ITS ASSOCIATED SLEEVE, A THRUST PLATE, MEANS MAINTAINING SAID PROJECTING END OF EACH PISTON IN SLIDING RELATIONSHIP WITH SAID THRUST PLATE, MEANS FOR SUPPORTING SAID THRUST PLATE IN INCLINED RELATIONSHIP RELATIVE TO THE AXIS OF ROTATION OF THE ROTOR WHEREBY AS THE ROTOR ROTATES THE PISTONS ARE CAUSED TO RECIPROCATE IN THEIR SLEEVES, AT LEAST ONE END OF EACH SLEEVE EXTENDING OUT OF SAID ROTOR AND INTO A FLUID FLOW OPENING EXTENDING THROUGH A PORT PLATE, SAID PORT PLATE BEING ROTATABLE WITH SAID ROTOR, MEANS FOR EFFECTING LIMITED AXIAL AND INCLINED MOTION OF SAID PORT PLATE RELATIVE TO SAID ROTOR AND SAID SLEEVES, SAID LAST-MENTIONED MEANS INCLUDING SEALING MEANS BETWEEN SAID SLEEVES AND THE FLUID FLOW OPENINGS IN THE PORT PLATE THEREBY FORMING A LIQUID TIGHT SEAL IN ADDITION TO EFFECTING THE LATTER-NOTED RELATIVE AXIAL AND INCLINED MOTION.