Piston seal for rotary engines

Claim 1

A PISTON SEAL FOR A ROTARY ENGINE, COMPRISING, A PISTON HAVING A GROOVE THEREIN HAVING TWO PARALLEL FACES AND A BOTTOM WALL, A SPACING MEMBER POSITIONED CENTRALLY OF SAID GROOVE AND EXTENDING FROM THE BOTTOM OF SAID GROOVE AND HAVING TWO FACES SPACED FROM AND PARALLEL TO SAID GROOVE FACES, SAID SPACING MEMBER BEING OF POROUS MATERIAL AND CARRYING A LUBRICANT, A PLURALITY OF STRIP-LIKE SEALING ELEMENTS SLIDABLY DISPOSED WITHIN THE GROOVE IN MUTUALLY PARALLEL RELATIONSHIP, ONE OF SAID SEALING ELEMENTS INTERMEDIATE ONE SIDE OF SAID GROOVE AND THE ADJACENT FACE OF SAID SPACING MEMBER, AND A SECOND OF SAID SEALING ELEMENTS INTERMEDIATE SAID OTHER FACE OF SAID GROOVE AND THE ADJACENT FACE OF SAID SEALING MEMBER, INNER EDGES OF SAID SEALING ELEMENTS BEING SPACED FROM SAID BOTTOM WALL OF SAID GROOVE, PORTIONS OF SAID ELEMENTS EXTENDING FROM SAID PISTON AND FORMING SLIDE SEAL SURFACES WHICH IS TRANSVERSE SECTION ARE ROUNDED ALONG LINES HAVING A COMMON CENTER POINT, SPACED FROM THE CENTER POINTS OF THE PISTON AND THE CYLINDER.