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:
Mar. 25, 2003
Filed:
Feb. 06, 2001
Applicant:
Inventor:
Wolfgang Schrittenlacher, Hamburg, DE;
Assignee:
Fafnir GmbH, Hamburg, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01F 1/68 ;
U.S. Cl.
CPC ...
G01F 1/68 ;
Abstract
A thermal flow-rate sensor has a flow sensor ( ) and a thermal-conductivity measuring cell ( ). The flow sensor ( ) comprises a first heating device and a first temperature detector, which reacts to the temperature of the first heating device, and can be exposed to a flowing fluid whose flow rate is to be determined. The thermal-conductivity measuring cell ( ) comprises a measuring-cell casing ( ), a second heating device and a second temperature detector which reacts to the temperature of the second heating device. The measuring-cell casing ( ) has at least one opening ( ) arranged for entry of the fluid into the measuring-cell casing ( ).