Patent ID: 8459341

Claim:
A heat pipe, comprising: an elongated casing having an evaporating section and a condensing section; a wick disposed within an inner wall of the evaporating section of the casing; at least one artery mesh disposed in the casing, the at least one artery mesh comprising a large portion and a small portion with an outer diameter smaller than that of the large portion, the small portion being located within and in direct physical contact with an inner surface of the wick, the large portion being in direct physical contact with an inner wall of the condensing section of the casing; and working medium filled in the casing and saturating the wick and the at least one artery mesh; wherein the heat pipe is a flat-type heat pipe, the casing comprises two opposite flat plates and two opposite sidewalls respectively connected between opposite lateral edges of the two flat plates, and the outer diameter of the large portion of the at least one artery mesh is substantially equal to a distance between the flat plates and is less than a distance between the sidewalls; and wherein the large portion of the at least one artery mesh is in linear and direct physical contact with each of the flat plates along an entire length of the condensing section, and the small portion of the at least one artery mesh is in linear and direct physical contact with the wick along an entire length of the evaporating section.