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:
Apr. 17, 2018
Filed:
Feb. 03, 2014
Hitachi Automotive Systems, Ltd., Ibaraki, JP;
Masatoshi Ogata, Tokyo, JP;
Norio Ishitsuka, Tokyo, JP;
Shinobu Tashiro, Hitachinaka, JP;
Noboru Tokuyasu, Hitachinaka, JP;
Takeshi Morino, Hitachinaka, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Hitachinaka-Shi, JP;
Abstract
An object of the present invention is to provide a thermal-type air flow meter with a high measurement accuracy by reducing influence of a thermal stress generated in a resistor in an LSI while securing a high positioning accuracy flow rate detection unit. Thus, a thermal-type air flow meter is provided with: a sensor assemblyincluding an LSIhaving a resistorand a flow rate detection unitwhich are configured by insert molding so as to expose at least a part of the flow rate detection unit, a housingwhich has secondary passagesand, and houses the sensor assemblyby allowing the flow rate detection unitto be arranged in the secondary passage, the sensor assemblybeing molded using a first resin, and the housingbeing molded using a second resin, the sensor assemblybeing fixed to the housingusing the second resin; and resin structuresandwhich cause a tensile stress in a direction parallel to a surface on which the flow rate detection unitis exposed with respect to the sensor assembly