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. 02, 1996
Filed:
Dec. 07, 1992
Roy J Ricci, Annapolis, MD (US);
Gary L Hill, Kennesaw, GA (US);
Charles A Burton, White, GA (US);
Rodney M Eslinger, Marietta, GA (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
Electromagnetic field pulses are induced in an electrically conductive/magnetically permeable housing and valving element movable within the housing of a check valve by an energizing coil placed against the housing and forming a loop extending substantially over the full range of travel of the valving element. At least two sensing coils positioned within the loop of the energizing coil proximate the two ends of the range of travel of the valving element, and preferably an array including additional sensing coils spaced between the two end coils, detect transient responses to the induced pulses from which the position of the valving element is determined.