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. 31, 2015
Filed:
Dec. 29, 2009
Jimmie L. Snowbarger, Marshalltown, IA (US);
Jimmie L. Snowbarger, Marshalltown, IA (US);
Fisher Controls International LLC, Marshalltown, IA (US);
Abstract
Example methods, apparatus and articles of manufacture to test safety instrumented system (SIS) solenoids are disclosed. A disclosed valve position control apparatus includes a relay to control a state of a solenoid and a valve positioner including a transmitter to transmit a solenoid test signal to the relay, electrical contacts to communicatively couple the solenoid test signal to the relay via one or more wires, and a solenoid tester to generate the solenoid test signal and to monitor a response of the solenoid when the solenoid test signal is transmitted to the relay to verify an operation of the solenoid.