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:
Aug. 16, 2005
Filed:
Nov. 08, 2004
Akihiro Ito, Komaki, JP;
Naotsugu Seko, Komaki, JP;
Akihiro Ito, Komaki, JP;
Naotsugu Seko, Komaki, JP;
CKD Corporation, Komaki, JP;
Abstract
The present invention relates to a thermal flowmeter capable of sensing a flow rate in either direction, having a linear output characteristic, and producing a stable output without impairing the response characteristic. In the thermal flowmeter, a laminate is fitted in a channel space formed in a body, forming a main channel. The laminate includes a mesh sheet so that a mesh portion is provided between the main channel and a sensor channel. A measurement chip is provided with an upstream temperature sensing resistor, a downstream temperature sensing resistor, a heating resistor, and a fluid temperature sensing resistor. By an electric circuit, the heating resistor and the fluid temperature sensing resistor are controlled to provide a constant temperature difference. Accordingly, the flow rate of a fluid under measurement is measured based on a temperature difference between the upstream and downstream temperature sensing resistors.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile