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:
Nov. 15, 2005
Filed:
Mar. 21, 2003
Junichi Yamagishi, Taito-ku, Tokyo 111-0034, JP;
Eikou Yo, Tokyo, JP;
Junichi Yamagishi, Taito-ku, Tokyo 111-0034, JP;
Eikou Yo, Tokyo, JP;
Other;
Unirec Co., Ltd., Tokyo, JP;
Abstract
To detect a variation of capacitance in a path of a piping and enable to decide a fluid state of a fluid substance flowing through the path in the piping, a capacitance sensor () includes a measuring electrode () and a grounding electrode () made of a conductive metallic film and wound around a path in the piping (), with an insulator () in between. A shield member () covers the measuring electrode and grounding electrode, with an insulator in between. The grounding electrode is narrower than the measuring electrode, and the measuring electrode and the grounding electrode are alternately disposed and are wound to be spiral along a flow direction.