Trochoid compensation for rotary engine

Claim 1

A ROTARY COMBUSTION ENGINE COMPRISING A HOLLOW OUTER BODY HAVING A CAVITY WITH A PERIPHERAL WALL, THE INNER SURFACE OF SAID PERIPHERAL WALL HAVING BASICALLY THE PROFILE OF A TWO-LOBED EPITROCHOID; A ROTOR MOUNTED WITHIN SAID CAVITY AND HAVING THREE CIRCUMFERENTIALLY-SPACED APEX PORTIONS, EACH OF SAID APEX PORTIONS HAVING AN OUTWARDLY-OPENING GROOVE EXTENDING FROM ONE END FACE TO THE OTHER END FACE OF THE ROTOR; AND APEX SEAL STRIP MEANS IN EACH APEX GROOVE FOR SEALING COOPERATION WITH SAID EPITROCHOIDAL INNER SURFACE TO FORM A PLURALITY OF WORKING CHAMBERS WHICH VARY IN VOLUME UPON RELATIVE ROTATION OF SAID ROTOR AND OUTER BODY, SAID OUTER BODY HAVING INTAKE AND EXHAUST PORTS OPENING INTO SAID CAVITY ON OPPOSITE SIDES OF AND ADJACENT TO ONE END OF THE MINOR AXIS OF SAID EPITROCHOIDAL INNER SURFACE, AT LEAST ONE REGION OF SAID EPITROCHOIDAL INNER SURFACE BEING ENLARGED TO REQUIRE OUTWARD MOVEMENT OF EACH APEX SEAL STRIP MEANS IN SAID REGION DURING ENGINE OPERATION TO MAINTAIN CONTACT WITH SAID INNER SURFACE IN SAID REGION, SAID REGION EXTENDING IN THE DIRECTION OF RELATIVE ROTOR ROTATION FROM A POINT LOCATED SUBSTANTIALLY AT AN APEX SEAL STRIP MEANS WHEN ANOTHER OF SAID APEX SEAL STRIP MEANS IS ABOUT TO OPEN A WORKING CHAMBER TO THE EXHAUST PORT.