Rotary pump

Claim 1

A FLUID PRESSURE TRANSLATING DEIVCE COMPRISING A HOUSING, A CHAMBER IN SAID HOUSING, AN INLET RECCESS LEADING TO AND AN OUTLET RECESS LEADING FROM SAID CHAMBER, A ROTARY MEMBER IN SAID CHAMBER SUBJECT TO FLUID UNDER PRESSURE, SAID MEMBER HAVING SURFACCE TO BE SEALED, A MOVABLE ELEMENT IN ENGAGEMENT WITH SAID SURFACE FOR MOVABLE ELEMENT IN ENGAGEMENT WITH SAID SURFACE FOR SURFACE A PLURALITY OF AREAS FORMING A SUBSTANTIALLY PERIPHERAL AREA EXTENNDING FROM SAID OUTLET RECESS TO A POSITIONN IN CLOSE PROXIMITY TO SAID INLET RECCESS WITH ALTERNATING AREAS THEREOF SUBJECT TO FLUID UNDER PRESSURE TENDING TO SEPARATE THE MOVABLE ELEMENT FROM SAID SURFACE, FIRST MEANS SUBJECTING SAID ENTIRE SUBSTANTIALLY PERIIPHERAL AREA TO INCREASING AND DECREASING FLUID PRESDURE FLUCTUATING FORCES AS SAID ROTARY MEMBER ROTATES, SAID FIRST MEANS PROVIIDING PRKESSURE COMMUNICATION BETWEEN SAID CHAMBER AND SAID OUTLET RECESS, AT LEAST ONE OF SAID AREAS WHICH IS OTHERWISE CLOSED TO THE OUTLET RECESS BEING IN COMMUNICATION WITH SAID OUTTLET RECESS THROUGH SAID FIRST MEANS, SECOND MEANS IN COMMUNICATION SOLELY WITH SAID FIRSTT MEANS AND SAID OUTLET RECESS FOR APPLYING SECOND FORCES TO SAID MOVEABLE ELEMENT IN OPPOSITION TO SAID SEPARRATING FORCES WHEREBY SAID ELEMENT IS MAINTAINED IN SEALING CONTCT WITHH SAID SURFACCE, AND THIRD MEANS IN COMMUNICATION ONLY WITHH SAIDD SECOND MEANS AND SAID MOVABLE ELEMENT FOR SOLELY CAUSING SAID SECOND FORCES TO INCREASINGLY AND DECREASINGLYY FLUCTUATE SUBSTANTIALLY IN PHASE, DURATION AND IN LIKE MANNER WITH SAID FIRST FORCES AND MAINTAIN A SUBSTANTIALLY UNIFORM INCREMENTAL FORCE DIFFERENTIAL THEREBETWEEN IRRESPECTIVE OF WHETHER THE SAID FFIRIST FORCES ARE INCREASING OR DECREASING.