Rotary internal combustion engine

Claim 1

A ROTARY PISTON INTERNAL COMBUSTION ENGINE, COMPRISING IN COMBINATION AN OUTER BODY HAVING AXIALLY SPACED END WALLS AND A MULTILOBED PERIPHERAL WALL THEREBETWEEN HAVING A BASICALLY EPITROCHOIDAL INNER SURFACE, A ROTATABLE SHAFT TRANSPIERCING SAID END WALLS PERPENDICULARLY THERETO AND HAVING AN ECCENTRIC PORTION DISPOSED WITHIN SAID OUTER BODY, A MULTI-APEXED PISTON MEMBER ROTATABLY MOUNTED ON SAID ECCENTRIC WHEREBY ON RELATIVE ROTATION OF SAID PISTON AND SAID OUTER BODY VARIABLE VOLUME WORKING CHAMBERS ARE FORMED, SAID PISTON HAVING ONE MORE APEX PORTION THAN SAID PERIPHERAL WALL HAS LOBES AND HAVING AN END FACE ADJACENT TO EACH OF SAID END WALLS IN SEALING RELATION THEREWITH AND HAVING A WORKING FACE EXTENDING BETWEEN EACH PAIR OF ADJACENT APEXES, A RADIALLY MOVABLE APEX SEAL MEMBER BORNE BY EACH OF SAID APEX PORTIONS SWEEPING SAID EPITROCHOIDAL SURFACE IN SEALING RELATION THEREWITH, SAID PERIPHERAL WALL HAVING A MAIN INDUCTION PORT AND AN EXHAUST PORT, AT LEAST ONE OF SAID END WALLS HAVING AN IDLING INDUCTION PORT OF SMALLER CROSSSECTION THAN SAID MAIN INDUCTION PORT AND DISPOSED IN AN AREA OF SAID END WALL THAT IS CONTINUOUSLY COVERED BY SAID PISTON MEMBER, SAID PISTON MEMBER HAVING A RECESS IN AT LEAST ONE END FACE ADJACENT TO SAID END WALL HAVING SAID IDLING PORT, SAID RECESS COMMUNICATING WITH THE ADJACENT WORKING FACE AND SO DISPOSED IN SAID END FACE THAT IT COMMUNICATES WITH SAID IDLING PORT ONCE IN EACH PISTON REVOLUTION.