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:
Oct. 15, 1991
Filed:
Jul. 25, 1990
Applicant:
Inventors:
Leoncio T Ang, Newport News, VA (US);
Charles R Cook, Jr, Williamsburg, VA (US);
Assignee:
Siemens Automotive L.P., Auburn Hills, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
7320426 ;
Abstract
A matrix consisting of glass microspheres and cured epoxy is disposed in a cavity at the backside of the silicon diaphragm to strengthen the diaphragm without any significant adverse influence on the ability of the sensor to quickly and accurately respond to changes in mass air flow. The strenthening which is imparted to the device enables it to comply with certain specifications defining the extent to which the device must be capable of withstanding damage from air-entrained dust particles acting on the frontside of the diaphragm.