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:
Mar. 05, 2013
Filed:
Apr. 07, 2008
Applicants:
Yin Zhuang, Shanghai, CN;
LU Cang, Shanghai, CN;
Fan Jian Jun, Shanghai, CN;
Inventors:
Assignee:
Fisher Controls International, LLC, St. Louis, MO (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E03B 7/07 (2006.01); F16K 37/00 (2006.01); F17D 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Methods and apparatus to indicate a position of a valve are described. An example apparatus includes a first pressure sensor to detect an inlet pressure of a valve, a second pressure sensor to detect an outlet pressure of the valve, and a controller operatively coupled to the first pressure sensor and the second pressure sensor to determine a position of the valve corresponding to one of a plurality of predetermined operational states of the valve.