Patent ID: 6880580

Claim:
A heat pipe comprising: a hollow body having a receiving space and an open end; a cover member covering said open end, said cover member having an inner side facing said receiving space, an outer side opposite to said inner side, and a filling hole formed in said cover member, in fluid communication with said receiving space, and extending through said outer side; an elastic sealing member fitted within said filling hole; and a heat transfer fluid disposed in said receiving space, wherein said elastic sealing member is pierceable to provide a passage for injection of said heat transfer fluid through said elastic sealing member, and is contractable to seal said passage, wherein said filling hole includes a hole which opens at said outer side, said cover member further having a seat part bounding said hole at said inner side, said filling hole further having a first needle hole extending through said seat part and communicated with said hole and said receiving space, said heat pipe further comprising a securing member disposed fittingly in said hole and outwardly of said sealing member so as to press said sealing member against said seat part.