Rotary piston expansible chamber machine

Claim 1

AN EXPANSIBLE CHAMBER DEVICE OF THE POSITIVE DISPLACEMENT ROTARY PISTON TYPE COMPRISING A STATOR AND ROTOR, SAID STATOR HAVING THEREIN A GENERALLY POLYGONAL-SHAPED COMPARTMENT BOUNDED BY A PAIR OF SAIDE WALLS AND AN UNDULATING PERIPHERAL WALL, A DRIVE SHAFT JOURNALED IN SAID STATOR AND DISPOSED CENTRALLY OF SAID COMPARTMENT, SAID ROTOR BEING DISPOSED IN SAID COMPARTMENT AND MOUNTED ECCENTRICALLY AND ROTATABLY UPON SAID DRIVE SHAFT, SAID ROTOR HAVING A CENTRAL HUB WITH A PLURALITY OF RADIALLY EXTENDING BLADES COMPRISING PISTONS, SEALING MEANS CARRIED BY SAID BLADES AND HAVING A SLIDING AND SEALING ENGAGEMENT WITH SAID PERIPHERAL AND SIDE WALLS, SAID BLADES, SIDE WALLS AND PERIPHERAL WALL DEFINING SUCCESSIVE WORKING CHAMBERS WHICH EXPAND AND CONTRACT SUCCESSIVELY UPON MOVEMENT OF SAID PISTONS ABOUT SAID COMPARTMENT, AND FLUID INLET AND OUTLET MEANS COMMUNICATING WITH SAID CHAMBER, SAID SEALING MEANS COMPRISING, A CYLINDRICAL SEALING ELEMENT IN A SEMI-CYLINDRICAL, AXIALLY EXTENDING CHANNEL AT THE OUTER ENDS OF EACH BLADE, EACH SEALING ELEMENT COMPRISING SEALING STRIPS ON OPPOSITE ENDS, A PAIR OF ALIGNED, SPACED CYLINDRICAL SECTIONS HAVING INTERDIGITATED, AXIALLY EXTENDING FINGERS ON ADJACENT ENDS, A CYLINDRICAL GUIDE MEMBER DISPOSED WITHIN SAID CYLINDRICAL SECTIONS OVERLAPPING THE INTERDIGITATED FINGERS, A PAIR OF SPRINGS DISPOSED ON OPPOSITE SIDES OF AND ABUTTING THE GUIDE MEMBER TO YIELDINGLY URGE THE SECTIONS APART FOR AXIALLY AND RESILIENTLY EXTENDING THE SEALING STRIPS INTO SEALING ENGAGEMENT WITH SAID SIDE WALLS, EACH OF SAID STRIPS HAVING A CAP PORTION EMBRACING THE OUTER END OF A CYLINDRICAL SECTION AND ENGAGING ONE OF SAID SPRINGS.