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:
Mar. 20, 2001
Filed:
Nov. 25, 1998
Yoichi Arai, Shizuoka-ken, JP;
Kenichi Shimoyama, Shizuoka-ken, JP;
Toshifumi Maemoto, Hiroshima-ken, JP;
Yazaki Corporation, Tokyo, JP;
Abstract
A hydrogen detector detects a concentration of hydrogen gas in an enclosed space communicating with an accommodation space for accommodating a battery, a hydrogen gas expeller is operative for expelling hydrogen gas from the enclosed space, a controller responds to a concentration of hydrogen gas detected by the detector, as the detected concentration exceeds a lower significant concentration, to provide a control signal for driving the expeller, an alarm system is operative for providing an alarm on an abnormal concentration of hydrogen gas, and another controller responds to the concentration of hydrogen gas detected by the detector, as the detected concentration exceeds a higher significant concentration, to provide a control signal for driving the alarm system.