Patent ID: 9217456
Filing Date: 2015-12-22
Classification: E04D,F16B

Abstract:
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.