Patent ID: 6913072

Claim:
A heat dissipating device comprising: a tubular body adapted to be mounted on a heat source, said tubular body having opposite top and bottom ends, a peripheral wall between said top and bottom ends, a main chamber defined by said top and bottom ends and said peripheral wall, at least one hollow extension part extending outwardly from said peripheral wall, and a plurality of fins extending outwardly from said peripheral wall and said extension part, said hollow extension part having an extension chamber that is in fluid communication with said main chamber, said extension part being elongated in a radial direction and narrow in a direction transverse to said radial direction; a heat transfer fluid contained in said main chamber and said extension chamber; and a top cover member covering said top end of said tubular body, and a bottom cover member covering said bottom end of said tubular body, each of said top and bottom cover members having a cap portion covering said main chamber, and a wing portion extending outwardly from said cap portion and closing said extension chamber.