Patent ID: 7549368

Claim:
Light-metal piston ( 10 ) having heat pipes, having a combustion bowl ( 2 ) of suitable crown thickness disposed in the piston crown ( 1 ), having a ring belt ( 3 ), piston skirt ( 4 ), and pin boss for accommodating a piston pin, as well as having a plurality of sealed, liquid-filled heat pipes ( 6 ), provided with an evaporator ( 6 a ) and condenser side ( 6 b ), which are disposed distributed on the circumference, in the vicinity of the ring belt ( 3 ), and directed axially towards the piston axis (A), wherein the evaporator side ( 6 a ) of the heat pipes ( 6 ) is formed by short pipe sections that are disposed oriented with the combustion jet, in the crown thickness ( 13 ), towards the piston crown ( 1 ), and connected by means of a composite heat pipe ( 7 ) that runs parallel to the piston crown ( 1 ); that at least two pipe sections that act as the condenser side ( 6 b ) are coupled with the composite heat pipe ( 7 ) in such a manner that a continuous, closed process circuit of the cooling fluid between evaporator side, composite heat pipe, and condenser side of the heat pipes ( 6 ) is implemented by means of a pipe connection ( 8 ) disposed on their condenser-side ends ( 7 a ).