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. 13, 1993
Filed:
Mar. 15, 1991
Applicant:
Inventors:
Robert L Forgacs, Dearborn Heights, MI (US);
John L Bomback, Plymouth, MI (US);
Shaun L McCarthy, Ann Arbor, MI (US);
Assignee:
Ford Motor Company, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E01F / ;
U.S. Cl.
CPC ...
7320426 ;
Abstract
A hot-wire mass air flow sensor includes integral, elongated silicon members with a silicon dioxide coating on which temperature sensitive resistors are deposited. The air flow sensor has an extremely low thermal conductivity material base on which is mounted one or more of the elongate silicon members. This structure maximizes the thermal impedance of the conductive path existing at the ends of the flow sensor resistors and minimizes sensor errors. A method for fabricating the air flow sensor is also provided.