Rotary-piston engine construction

Claim 1

A RADIAL SEAL FOR PISTONS IN ROTARY-PISTON INTERNAL COMBUSTION ENGINES, ESPECIALLY OF TROCHOIDAL CONSTRUCTION, HAVING AN ENCLOSURE BODY PROVIDED WITH INTERNAL SURFACES AND A ROTARY-PISTON OPERABLE TO ROTATE WITHIN SAID ENCLOSURE BODY, COMPRISING: POLYGONAL PISTON MEANS PROVIDED WITH GROOVE MEANS DISPOSED AT THE PISTON CORNERS AND EXTENDING SUBSTANTIALLY PARALLELY TO THE AXIS OF THE PISTON AND SUBSTANTIALLY OVER THE ENTIRE AXIAL LENGTH THEREOF, SEALING PLATE MEANS INCLUDING AT LEAST TWO VANE-LIKE SEALING MEANS DISPOSED WITHIN A RESPECTIVE GROOVE MEANS ONE BEHIND THE OTHER IN THE DIRECTION OF ROTATION OF THE PISTON MEANS AND OPERABLE TO ABUT IN SEALING RELATIONSHIP AGAINST THE INTERNAL SURFACES OF THE ENCLOSURE BODY AND, UPON SUCH ABUTMENT, EFFECTIVELY PROVIDING SPACE MEANS BETWEEN THE HEAD PORTIONS OF SAID SEALING MEMBERS AND SAID INTERNAL SURFACES, ALL BUT THE LAST SEALING MEMBER, AS VIEWED IN THE DIRECTION OF ROTATION OF THE PISTON MEANS, BEING PROVIDED WITH GROOVE MEANS IN THE HEAD PORTIONS THEREOF WHICH EXTEND SUBSTANTIALLY IN THE DIRECTION OF ROTATION OF THE PISTON MEANS AND PROVIDE A COMMUNICATION BETWEEN SAID SPACE MEANS AND THE SPACE WITHIN SAID ENCLOSURE BODY DISPOSED IN FRONT OF THE FIRST SEALING MEMBER AS VIEWED IN THE DIRECTION OF ROTATION.