Waterproof, dustproof, breathing bolt

摘要

A waterproof, dustproof, breathing bolt includes a bolt body having a hollow shank with a breathing chamber and a cap member fixedly located at the top side of the hollow shank and defining therein an air passage in communication with the breathing chamber and one or a number of openings in communication between the air passage and the surroundings, and a waterproof breathing member made out of a metal material by powder metallurgy and set in between the breathing chamber and the air passage and having micro pores therein of size larger than air molecules but smaller than water molecules. Thus, the waterproof breathing member allows discharge of hot air out of the apparatus in which the waterproof, dustproof, breathing bolt is installed, but prohibits external water from entering the apparatus.

主权项

1. A waterproof, dustproof, breathing bolt, comprising:
a bolt body comprising a hollow shank and a cap member fixedly mounted at a top side of said hollow shank, said hollow shank comprising a breathing chamber downwardly extending from a bottom side thereof and anchoring means located at the periphery thereof for mounting, said cap member defining therein an air passage in communication with said breathing chamber and at least one opening in communication between said air passage and the surroundings; and a waterproof breathing member made out of a metal material by powder metallurgy and set in between said breathing chamber and said air passage, said waterproof breathing member comprising a plurality of micro pores of size larger than air molecules but smaller than water molecules, wherein said waterproof breathing member has a base portion and an extension portion protruded from the base portion; wherein said hollow shank further includes a breathing passage in communication between said breathing chamber and said air passage and adapted for accommodating said waterproof breathing member, and said base portion is located in said breathing chamber and a part of said extension portion protrudes out of said breathing passage to be located in the said breathing chamber.