Waterproof and breathable plug

Abstract

A waterproof and breathable plug includes a plug body having a mounting base, an air vent on the mounting base, a tubular screw rod at one side of the mounting base and arched blocks at the other side of the mounting base, a waterproof and breathable membrane covering the air vent, and a cover member having a cap nut threaded onto the arched blocks and air valves mounted in the cap nut and movable with rotation of the cap nut to adjust the open rate of the opening between each two adjacent arched blocks of the plug body and to further regulating the breathing rate.

What the invention claimed is: 
     
         1 . A waterproof and breathable plug, comprising:
 a plug body, said plug body comprising a mounting base having opposing front and back sides, an air vent cut through the front and back sides of said mounting base, a tubular screw rod perpendicularly extending from the back side of said mounting base in communication with said air vent, a plurality of arched blocks perpendicularly extended from the front side of said mounting base and equiangularly spaced around said air vent and a plurality of openings respectively defined between each two adjacent arched blocks, each said arched block having an outer wall and outer threads located on said outer wall;   at least one waterproof and breathable membrane attached to the front side of said mounting base of said plug body over said air vent and surrounded by said arched blocks; and   a cover member fastened to said arched blocks of said plug body and movable relative to said arched blocks of said plug body to close/open said openings, said cover member comprising a plurality of air valves and a cap nut, said cap nut having a threaded inside wall threaded onto the outer threads of said arched blocks of said plug body and a recessed chamber defined therein and surrounded by said threaded inside wall, said air valves being perpendicularly mounted inside said recessed chamber in an equiangularly spaced manner and movable with said cap nut relative to said arched blocks of said plug body to adjust the open rate of said openings.   
     
     
         2 . The waterproof and breathable plug as claimed in  claim 1 , wherein said air valves are smoothly arched, fitting the curvature of said arched blocks of said plug body. 
     
     
         3 . The waterproof and breathable plug as claimed in  claim 1 , wherein the number of said air valves and the number of said arched blocks are 4. 
     
     
         4 . The waterproof and breathable plug as claimed in  claim 1 , wherein said at least one waterproof and breathable membrane comprises a plurality of waterproof and breathable membranes arranged in a stack. 
     
     
         5 . The waterproof and breathable plug as claimed in  claim 1 , further comprising an adhesive applied to adhere said at least one waterproof and breathable membrane to said mounting base of said plug body. 
     
     
         6 . The waterproof and breathable plug as claimed in  claim 1 , wherein said at least one waterproof and breathable membrane is fixedly fastened to the periphery of said air vent of said plug body by high-frequency heat sealing technology. 
     
     
         7 . The waterproof and breathable plug as claimed in  claim 1 , further comprising at least one cushion ring fitted into the space surrounded by said arched blocks to hold down said at least one waterproof and breathable membrane. 
     
     
         8 . The waterproof and breathable plug as claimed in  claim 7 , wherein said at least one cushion ring comprises multiple cushion rings arranged in a stack. 
     
     
         9 . The waterproof and breathable plug as claimed in  claim 1 , further comprising an O-ring mounted on said tubular screw rod of said plug body and attached to the back side of said mounting base of said plug body, and a locknut threaded onto said tubular screw rod of said plug body to lock said plug body to a mounting through hole of an electrical box.