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:
Oct. 21, 2008
Filed:
Aug. 08, 2007
Masamichi Yamada, Hitachinaka, JP;
Masahiro Matsumoto, Hitachi, JP;
Hiroshi Nakano, Hitachi, JP;
Akio Yasukawa, Kashiwa, JP;
Izumi Watanabe, Hitachinaka, JP;
Masamichi Yamada, Hitachinaka, JP;
Masahiro Matsumoto, Hitachi, JP;
Hiroshi Nakano, Hitachi, JP;
Akio Yasukawa, Kashiwa, JP;
Izumi Watanabe, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The invention provides a thermal type flow meter which has a high reliability and a low cost. In a thermal type flow meter provided with a flow rate detecting element in which at least a heat generating resistor and a lead electrode are formed on a surface of a tabular substrate, and a support body in which a concave portion accommodating the flow rate detecting element is formed on a surface, and in which the flow rate detecting element is firmly fixed and accommodated by an adhesive agent in a back surface of the tabular substrate and a part of a bottom surface of the concave portion, an approximately straight discharge groove which is deeper than a bottom surface of the concave portion and passes through both end surfaces in upward and downward sides of the concave portion is formed from the upstream side of the support body concave portion to the downstream side, between the cavity of the tabular substrate and the back surface region of the tabular substrate in which the lead electrode is formed. Accordingly, it is possible to achieve the thermal type flow meter which has the high reliability and the low cost.