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:
Dec. 30, 2003
Filed:
Oct. 29, 2001
Dave Good, Chelsea, MI (US);
Tom Rozich, Au Gres, MI (US);
William Seaton, Dexter, MI (US);
Daniel D. Minor, Cadillac, MI (US);
Kenneth D. Mc Kibben, Defiance, OH (US);
Hayes Lemmerz International, Inc., Northville, MI (US);
Abstract
A sensor for measuring the distance between two surfaces injects pressurized fluid (e.g., air) between the surfaces. The pressurized fluid passes through two flow restrictors prior to reaching the surfaces to be measured. The fluid pressures between the flow restrictors and between the downstream flow restrictor and the surfaces are compared to yield the distance between the two surfaces. An accurate distance measurement can be obtained even where the surfaces to be measured are located in a hostile environment which would destroy many other types of sensors.