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. 24, 2020
Filed:
Mar. 06, 2017
Yanmar Co., Ltd., Osaka-shi, Osaka-fu, JP;
Fuji Electric Co., Ltd., Kawasaki-shi, Kanagawa-ken, JP;
Yoshinori Fukui, Osaka, JP;
Ryota Kobayashi, Osaka, JP;
Tetsuya Yokoyama, Osaka, JP;
Tsuyoshi Inoue, Osaka, JP;
Yusuke Oda, Osaka, JP;
Michiyasu Okada, Kawasaki, JP;
Kozo Akao, Kawasaki, JP;
Ryouichi Higashi, Kawasaki, JP;
YANMAR CO., LTD., Osaka, JP;
FUJI ELECTRIC CO., LTD., Kawasaki, JP;
Abstract
A gas concentration measuring device including a light emitter and a light receiver which are disposed so as to be opposed to each other with a hollow tube-like measurement pipe interposed therebetween. The device is configured to measure concentration of target gas passing through the measurement pipe using light applied from the light emitter, transmitted through the inside of the measurement pipe, and received by the light receiver. Purge gas guide pipes through which purge gas is introduced into optical systems of the light emitter and the light receiver are connected to a side wall of the measurement pipe. The measurement pipe includes a gas entrance portion having a tapered shape widening from a gas supply port toward a downstream side thereof.