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. 03, 2001
Filed:
Oct. 21, 1998
Applicant:
Inventors:
Eugenio Volonterio, Appiano Gentile, IT;
Riccardo Borelli, Lenno, IT;
Assignee:
ABB Kent Taylor S.p.A., Lenno, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B 7/14 ; G01B 7/30 ;
U.S. Cl.
CPC ...
G01B 7/14 ; G01B 7/30 ;
Abstract
A device for measuring the displacement of stems of valves having a spindle coupled to a stem of a valve and provided with two inductive pickups; each inductive pickup is formed by a fixed part and a movable part constituting a variable inductor, which, following a displacement of the stem and a rotation of the spindle coupled thereto, generates an inductance variation of the electric circuit associated thereto; electronic excitation and detection means are adapted to convert the inductance variations into a pair of digital signals whose difference is indicative of the displacement of the stem.