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. 04, 2008
Filed:
Aug. 31, 2007
Christopher Wargo, Wellesley, MA (US);
J. Karl Niermeyer, Tyngsboro, MA (US);
Jieh-hwa Shyu, Andover, MA (US);
Craig L. Brodeur, Marlborough, MA (US);
William Basser, North Adams, MA (US);
Christopher Wargo, Wellesley, MA (US);
J. Karl Niermeyer, Tyngsboro, MA (US);
Jieh-Hwa Shyu, Andover, MA (US);
Craig L. Brodeur, Marlborough, MA (US);
William Basser, North Adams, MA (US);
Entegris, Inc., Chaska, MN (US);
Abstract
Embodiments disclosed herein provide restrictive-flow flow measurement devices, valve improvements and signal control devices and processes that control the flow of liquids, including control processes for single-liquid calibration. In some embodiments, a valve can be adjusted by application of fuzzy logic which involves quantizing input variables into the degree to which a small set of logical values is true. In one embodiment, variables related to flow rate and change in flow rate over time can be compared to membership functions to generate fuzzy inputs, based upon which fuzzy outputs can be generated.