Rotary piston machine

Claim 1

IN A ROTARY PISTON MACHINE COMPRISING A HOUSING AND A PISTON ROTATABLE THEREIN AND DESCRIBING AN ENVELOPE CORRESPONDING TO THE INNER CONTOUR OF SAID HOUSING BY ROTATIONAL MOVEMENTS ABOUT THE AXIS OF SAID PISTON AND BY CIRCULAR MOVEMENTS OF SAID AXIS ABOUT THE CENTER AXIS OF SAID HOUSING, SAID MOVEMENTS HAVING AN INTEGRAL RATIO WITH RESPECT TO EACH OTHER, SAID PISTON FORMING WITH SAID HOUSING A PLURALITY OF CHAMBERS, THE VOLUMES OF WHICH VARY DURING THE RELATIVE RO/TATION BETWEEN SAID PISTON AND SAID HOUSING WHEREBY AN ALTERNATING PRESSURE GRADIENT IS PRODUCED BETWEEN ADJACENT CHAMBERS, SAID INNER CONTOUR BEING PROVIDED WITH A PLURALITY OF POINTS HAVING A SMALLEST DISTANCE FROM SAID CENTER AXIS AND ALTERNATING WITH A PLURALITY OF POINTS HAVING A GREATEST DISTANCE FROM SAID CENTER AXIS, SAID PISTON BEING ESSENTIALLY OF POLYGONAL CONFIGURATION AND HAVING A PLURALITY OF APICES, LINES OF SYMMETRY PASSING THROUGH SAID APICES AND INTERSECTING IN SAID PISTON AXIS, GUIDE GROOVES PROVIDED IN SAID PISTON SUBSTANTIALLY AT THE APICES THEREOF, SEALING ELEMENTS INSERTED IN SAID GUIDE GROOVES AND MOVABLE THEREIN, SAID SEALING ELEMENTS BEING PROVIDED WITH OUTER CONTOUR PARTS PARTICIPATING IN DESCRIBING SAID ENVELOPE AND CONTACTING SAID INNER HOUSING CONTOUR, THE RADIAL AXES OF SAID SEALING ELEMENTS BEING INCLINED WITH RESPECT TO SAID LINES OF SYMMETRY SO THAT THE ANGLE BETWEEN THE PLANES IN WHICH THE LATERAL SIDES OF SAID SEALING ELEMENTS LIE AND THE TANGENTS TO SAID INNER CONTOUR AT THE POINT OF CONTACT OF SAID SEALING ELEMENTS IS GREATER TAHN 85* AND LESS THAN 95* IN ZONES IN WHICH THE DIRECTION OF SAID PRESSURE GRADIENT IS INVERSED AND WHICH LIE BETWEEN 15* BEYOND THE POINT OF SMALLEST DISTANCE IN THE DIRECTION OF ROTOR ROTATION AND 15* BEFORE REACHING THE POINT OF GREATEST DISTANCE NEXT FOLLOWING, IN THE DIRECTION OF ROTOR ROTATION, SAID POINT OF SMALLEST DISTANCE.