Rotary piston engine

Claim 1

A ROTARY PISTON ENGINE, ESPECIALLY ROTARY PISTON INTERNAL COMBUSTION ENGINE, COMPRISING HOUSING MEANS, DRIVEN SHAFT MEANS, PISTON MEANS DISPOSED WITHIN SAID HOUSING MEANS AND SUPPORTED ON SAID SHAFT MEANS ECCENTRICALLY WITH RESPECT THERETO AND WITH THE AXIS OF SAID PISTON MEANS EXTENDING SUBSTANTIALLY PARALLELLY TO THE AXIS OF SAID SHAFT MEANS, AND TRANSMISSION MEANS FOR IMPARTING TO SAID PISTON MEANS A ROTARY MOVEMENT ABOUT ITS OWN AXIS OF ROTATION BEARING A PREDETERMINED RELATIONSHIP TO THE ROTARY SPEED OF SAID SHAFT MEANS INCLUDING INTERNALLY TOOTHED GEAR MEANS OPERATIVELY CONNECTED WITH SAID PISTON MEANS FOR COMMON ROTATION THEREWITH AND EXTERNALLY TOOTHED GEAR MEANS OPERATIVELY CONNECTED WITH SAID HOUSING MEANS SAID EXTERNALLY TOOTHED GEAR MEANS MESHING WITH SAID INTERNALLY TOOTHED GEAR MEANS, SAID GEAR MEANS HAVING AN INVOLUTE TOOTH CONSTRUCTION WITH A PREDETERMINED ADDENDUM MODIFICATION AND A PREDETERMINED PRESSURE ANGLE, ONE OF THE TWO CHARACTERISTICS CONSISTING OF THE SUM OF THE ADDENDUM COEFFICIENTS AND OF THE PRESSURE ANGLE BEING OF CONVENTIONAL VALUE AND THE OTHER HAVING A VALUE DIFFERING FROM THE CONVENTIONAL VALUE, SAID DIFFERING VALUE IN CASE OF THE PRESSURE ANGLE AMOUNTING TO A PRESSURE ANGLE OF AT LEAST 60* AND IN THE CASE OF THE ADDENDUM COEFFICIENTS BEING A POSITIVE SUM OF COEFFICIENTS WHICH IS LARGER BY AN EXPONENT OF 10 THAN WITH CONVENTIONAL TOOTH CONSTRUCTIONS.