Pistons of internal combustion engines

Claim 1

AN INTERNAL COMBUSTION ENGINE HAVING A PRESSURIZED OIL LUBRICATING SYSTEM, WHICH COMPRISES, IN COMBINATION, A CYLINDER, A PISTON CAP ELEMENT SLIDABLE AXIALLY IN SAID CYLINDER, A PISTON BODY ELEMENT SLIDABLE IN SAID CYLINDER, SAID PISTON ELEMENTS HAVING RESPECTIVE COOPERATINGG CYLINDRICAL SIDE WALLS FITTING SLIDABLY WITH RESPECT TO EACH OTHER AND BEING SHAPED TO LIMIT BETWEEN THEIR END WALLS A CHAMBER OF VARIABLE VOLUME, MEANS FOR LIMITING THE AXIAL DISPLACEMENTS OF SAID PISTON CAP ELEMENT AWAY FROM SAID PISTON BODY ELEMENT, A GUDGEON PIN CARRIED BY SAID PISTON BODY ELEMENT, SAID GUDGEON PIN BEING PROVIDED WITH AN INNER RECESS, A CONNECTING ROD PIVOTALLY CONNECTED WITH SAID GUDGEON PIN FOR RECIPROCATING SAID PISTON BODY ELEMENT IN SAID CYLINDER, SAID CONNECTING ROD BEING PROVIDED WITH A LUBRICATING OIL INLET CONDUIT OPENING INTO SAID GUDGEON PIN RECESS, SAID PISTON BODY ELEMENT BEING PROVIDED WITH LUBRICATING OIL DISTRIBUTION CONDUITS IN COMMUNICATION AT ONE END WITH SAID GUDGEON PIN RECESS AND OPENING AT THE OTHER END INTO THE CYLINDRICAL SIDE WALL OF SAID PISTON BODY ELEMENT THAT COOPERATES WITH SAID PISTON CAP ELEMENT CYLINDRICAL WALL, LUBRICATING OIL INLET AND OUTLET MEANS FOR SAID CHAMBER, THE RESPECTIVE COOPERATING WALLS OF SAID PISTON ELEMENTS BEING ADAPTED ON THE ONE HAND TO CLOSE SAID INLET AND OUTLET MEANS AND SAID CHAMBER IN A FLUIDTIGHT MANNER WHEN SAID PISTON CAP ELEMENT IS BROUGHT INTO ITS POSITION NEAREST TO SAID PISTON BODY ELEMENT BY THE PRESSURE IN SAID CYLINDER AND ON THE OTHER HAND, WHEN SAID PISTON CAP ELEMENT MOVES AWAY FROM SAID PISTON BODY ELEMENT ASSISTED BY THE PRESSURE OF SAID LUBRICATING OIL, TO OPEN SAID INLET AND OUTLET MEANS AND THEREBY CONNECT A POINT OF SAID CHAMBER WITH THE SECOND MENTIONED ENDS OF SAID OIL DISTRIBUTION CONDUITS AND ANOTHER POINT OF SAID CHAMBER WITH SAID LUBRICATING OIL OUTLET MEANS.