Patent ID: 6070654
Filing Date: 2000-06-06
Classification: B21C,B21J,F28D,G06F,Y10T

Abstract:
A heat pipe, comprising a sealed pipe containing therein a working liquid which is sealed under pressure and which changes between a liquid phase and a gas phase to transfer latent heat from one end of the sealed pipe to the other end of the sealed pipe, the sealed pipe having a helical shape composed of a first set of alternating ribs and grooves on an outer perimeter surface of the sealed pipe and a second set of alternating ribs and grooves on an inner perimeter surface of the sealed pipe, whereinthe ribs on the outer perimeter surface and the ribs on the inner perimeter surface are made of a wall of the sealed pipe and are formed by bending the wall,the grooves on the outer perimeter surface have a wider opening than the grooves on the inner perimeter surface, and are configured to allow the sealed pipe to maintain any deformation caused upon the sealed pipe, andthe grooves on the inner perimeter surface are configured to produce capillary action to draw the working liquid thereinto.