Patent ID: 7976307

Claim:
A light curing device having a light source, wherein the light source is connected to a good thermal conductor ( 18 ) which extends into a heat sink ( 12 ) provided with a front end portion adjacent to the light source, a rear end portion, and an intermediate portion formed therebetween, with cooling ribs ( 20 ) of the front end portion of the heat sink extending radially beyond the intermediate portion and with cooling ribs ( 22 ) of the rear portion extending radially beyond the intermediate portion, wherein the light curing device has components ( 60 ) which are placed on at least one printed circuit board ( 34 , 36 , 38 , 40 ) which protrudes into the intermediate portion of the heat sink, wherein the rear portion has a first diameter, the front end portion has a second diameter, the intermediate portion has a third diameter, wherein the third diameter is less than both the first and second diameters; wherein the cooling ribs of the front end portion extend from the end of the heat sink adjacent the light source towards the rear portion and terminate at the intermediate portion, wherein the cooling ribs of the rear portion extend from an end opposite the light source towards the front end portion and terminate at the intermediate portion, and wherein there are no cooling ribs located in the intermediate portion.