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. 06, 1999
Filed:
Jan. 12, 1998
Applicant:
Inventors:
Assignees:
Hitachi, Ltd., , JP;
Primary Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
7320426 ;
Abstract
A measuring element for an air flow rate measuring apparatus has upstream and downstream heating resistors and first and second temperature compensating resistors paired with the upstream and downstream heating resistors, respectively. The resistors are mounted on an electrically insulated substrate positioned within an air flow. A substantial part of resistor film of the temperature compensating resistor paired with the upstream heating resistor is positioned upstream on the insulated substrate relative to the resistor film of the compensating resistor paired with the downstream heating resistor.