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:
Aug. 04, 1998
Filed:
Jan. 21, 1997
J Otto Byers, Kalamazoo, MI (US);
Lambert Haner, Rocky River, OH (US);
J. Otto Byers & Associates, Kalamazoo, MI (US);
Abstract
A valve positioning system according to the present invention includes a force motor which responds to a command signal corresponding to a desired valve flow rate by energizing magnetic coils with a current to produce a flux force which moves the valve. Preferably two Hall effect sensors sense the actual position and provide a feedback signal to a control loop which compares the sensed position with the commanded position. The valve is positioned by adjusting the energizing current provided to the magnetic coils. The system optionally includes circuitry to compensate for the error in the actual position relative to the commanded position produced by changes in current in the magnetic coils.