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:
Nov. 11, 2003
Filed:
Jan. 25, 2001
Applicant:
Inventor:
Richard J. Winkler, Marshalltown, IA (US);
Assignee:
Fisher Controls International Inc., Clayton, MO (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05D 7/00 ;
U.S. Cl.
CPC ...
G05D 7/00 ;
Abstract
A method and apparatus for controlling a valve/actuator plant by generating a plurality of independent correcting control signals each responsive to a plurality of respective input signals and at least one of these input signals being the set point signal. The plurality of independent correcting control signals includes a pneumatic flow signal. The correcting control signals may be derived from all linear control signals, all non-linear control signals, or a combination of linear control signals and non-linear control signals.