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:
Feb. 28, 1995
Filed:
Feb. 19, 1992
Applicant:
Inventor:
Yasuhito Yajima, Nagoya, JP;
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
7320419 ; 7320427 ;
Abstract
A thermal type of flow rate sensor includes heat-generating and temperature-compensating resistors R.sub.H and R.sub.C which are located within a fluid passage to measure the flow rate of the fluid. The linear term coefficient, .alpha., of the temperature coefficient of resistance of R.sub.C is made smaller than that of R.sub.H, whereby any temperature-compensating electric circuit and circuit control can all be dispensed with and the flow rate of a fluid can be precisely detected over a wide temperature range.