Rotary piston internal combustion engine

Claim 1

A ROTARY PISTON INTERNAL COMBUSTION ENGINE, ESPECIALLY OF TROCHOIDAL CONSTRUCTION, COMPRISING: HOUSING MEANS HAVING LATERAL HOUSING PARTS AND CASING MEANS PROVIDED WITH MULTI-ARCHED INTERNAL SURFACES FORMING ZONES IN PROXIMITY TO THE AXIS OF THE ENGINE, ECCENTRIC SHAFT MEANS HAVING ECCENTRIC MEANS, POLYGONAL PISTON MEANS ROTATABLY SUPPORTED ON SAID ECCENTRIC MEANS AND PROVIDED WITH PISTON RECESS MEANS IN THE PISTON FLANKS THEREOF, SAID HOUSING MEANS BEING PROVIDED WITHIN ONE OF SAID ZONES WITH GAS EXCHANGE CHANNEL MEANS, SAID PISTON MEANS DURING MOVEMENT THEREOF RELATIVE TO SAID CASING MEANS AND TO THE ECCENTRIC SHAFT MEANS SLIDING WITH THE CORNERS THEREOF ALONG THE INNER GASING SURFACES AND THEREBY VALVING SAID GAS EXCHANGE CHANNEL MEANS, THE PISTON RECESS MEANS IN EACH PISTON FLANK HAVING CIRCULAR WALL MEANS, AND INLET GROOVE MEANS IN A RESPECTIVE PISTON FLANK TANGENTIALLY CONNECTED WITH THE SAID CIRCULAR WALL MEANS OF THE CORRESPONDING PISTON RECESS MEANS, SAID INLET GROOVE MEANS BEGINNING IN RELATION TO THE DIRECTION OF ROTATION OF THE PISTON MEANS WITHIN THE AREA OF THE TRAILING PISTON CORNER AND HAVING A DEPTH INCREASING CONTINUOUSLY FROM THE BEGINNING THEREOF TOWARD THE RECESS MEANS AND CORRESPONDING SUBSTANTIALLY TO THE DEPTH OF THE PISTON RECESS MEANS AT THE PLACE OF CONNECTION THEREWITH.