The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 02, 1994
Filed:
May. 18, 1992
Yoshihisa Naito, Kawasaki, JP;
Takahiro Hayashi, Yokohama, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A watertight casing for electronic apparatus includes a first case, a second case and a cover. Sealing members are interposed between the first case and the second case, and between the second case and the cover, respectively. The first and the second cases and the cover are fastened tightly together. A printed board mounts electronic parts on one side thereof, and an air-zinc battery on the other side. The first case is provided with a recess portion into which the electronic parts on the printed board are received. Another sealing member is interposed between the second case and the other side of the printed board. The second case is provided with a through hole which is closed by the cover. The battery is received in the through hole in a sealed manner. The second case is further provided with a vent hole communicating the through hole with an atmosphere. At the opening end of the vent hole there is provided with a gas permeable waterproof sheet for permitting air to pass through but not permitting moisture to pass through.