Piston and piston cooling means

Claim 1

IN A PISTON FOR A TWO-CYCLE INTERNAL COMBUSTION ENGINE, A HOLLOW PISTON MEMBER INCLUDING A CLOSED HEAD END PORTION CENTRALLY RECESSED TO FORM A COMBUSTION CHAMBER BOWL OUTWARDLY EMBRACED BY A HOLLOW RIM PORTION, A CYLINDRICAL SKIRT PORTION EXTENDING LONGITUDINALLY FROM SAID RIM PORTION, AN ANNULAR THRUST COLLAR PORTION SPACED CONCENTRICALLY AND INTERMEDIATE THE ENDS OF THE SKIRT PORTION AND COAXIALLY OF THE HEAD PORTION, SAID ANNULAR THRUST PORTION BEING STRUCTURALLY CONNECTED TO THE CENTRAL BOWL PORTION OF THE PISTON HEAD BY A FIST PLURALITY OF RELATIVELY THIN EQUIANGULARLY AND CLOSELY SPACED LOAD TRANSMITTING AND HEAT CONDUCTING STRUTS OF WEDGE-SHAPED SECTION SPACED RADIALLY INWARDLY OF THE PISTON SKIRT PORTION AND EXTENDING LONGITUDINALLY AND RADIALLY BETWEEN THE ANNULAR THRUST PORTION AND THE RECESSED CENTRAL BOWL OF THE PISTON HEAD, THE LOWER ENDS OF SAID FIRST STRUTS BEING SUBSTANTIALLY EQUAL IN RADIAL DIMENSION AND INTEGRALLY CONNECTED TO THE ANNULAR THRUST COLLAR PORTION AND THE UPPER ENDS OF SAID FIRST STRUTS BEING ROUNDED TO FORM A PLURALITY LOAD BEARING AND HEAT CONDUCTING ARCHES TANGENTIALLY INCLUDING THE BOWL FORMING WALL PORTION OF THE PISTON HEAD, AND A SECOND PLURALITY OF EQUIANGULARLY SPACED STRUTS RADIALLY CONNECTING THE ANNULAR THRUST COLLAR PORTION TO THE OUTWARDLY ADJACENT SKIRT PORTION OF THE PISTON, AND SAID PISTON MEMBER DEFINING A COOLANT RECEIVING CHAMBER OUTWARDLY EMBRACED BY THE PISTON SKIRT PORTION AND EXTENDING BETWEEN THE THRUST COLLAR PORTION AND THE HEAD END OF THE PISTON MEMBER.