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. 26, 2014
Filed:
Jun. 23, 2011
Jingli LI, Louisville, KY (US);
Bruce Rigsby, Charlestown, IN (US);
Robert L. Lafountain, Charlestown, IN (US);
Bruce R. Penning, Louisville, KY (US);
Jingli Li, Louisville, KY (US);
Bruce Rigsby, Charlestown, IN (US);
Robert L. LaFountain, Charlestown, IN (US);
Bruce R. Penning, Louisville, KY (US);
General Equipment and Manufacturing Company, Inc., Louisville, KY (US);
Abstract
An automatic speed searching device for a partial stroke test of a control valve includes a spool valve operatively connected to a pilot valve and a blocker valve. An electrical module is operatively connected to the pilot valve, a supply of control fluid, and the blocker valve. In an open position of the spool valve, a first control fluid inlet is fluidly connected to a first control fluid outlet, and in a closed position of the spool valve the first control fluid outlet is fluidly connected to a second control fluid outlet. A method of determining an optimum stroke speed includes iteratively powering a main and secondary solenoid in the electrical module and updating parameters to move a control element of the control valve until movement of the control element is within a desired range.