Waterproof casing

Details Waterproof casing Waterproof casing

1996-10-31

1997-07-22

Kincaid, Kristine L.

Electricity: conductors and insulators

With fluids or vacuum

Boxes and housings

174 17CT, 174 50, H05K 503

Patent

active

056505914

ABSTRACT:
This invention aims to provide a waterproof casing which can keep its waterproof function under a great change of temperature. In the waterproof casing, a lid (20) which covers an opening in a body (10) is provided with a pipe (24) which intercommunicates an interior and an exterior of the casing. A porous waterproof filter (25) closes a port (24a) in the pipe (24). Air in the body (10) is expanded and contracted under changes in temperature. However, only air can pass through the filter (25) into and out of the body (10) with water being precluded, thereby waterproofing the interior of the casing.

REFERENCES:
patent: 3987258 (1976-10-01), Tsutusui et al.
patent: 4709123 (1987-11-01), Yamashita et al.
patent: 4772759 (1988-09-01), Roy et al.
patent: 4936787 (1990-06-01), Klein et al.
patent: 4975545 (1990-12-01), China et al.
patent: 5233377 (1993-08-01), Kosako
patent: 5264661 (1993-11-01), Luettgen
patent: 5305145 (1994-04-01), Tanaka
patent: 5334799 (1994-08-01), Naito et al.
"Water Impervious Vent for Electrical and Similar Equipment," Research Disclosure, No. 275, p. 149 Mar. 1987, New York, NY, US.

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