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:
Dec. 25, 2018
Filed:
Jan. 11, 2016
Applicant:
Fisher Controls International Llc, Marshalltown, IA (US);
Inventors:
Richard Allen Nordstrom, Marshalltown, IA (US);
Shawn William Anderson, Marshalltown, IA (US);
Bret Anthony Dahme, Marshalltown, IA (US);
Assignee:
Fisher Controls International LLC, Marshalltown, IA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 29/14 (2006.01); G01N 29/44 (2006.01); G01N 29/30 (2006.01);
U.S. Cl.
CPC ...
G01N 29/14 (2013.01); G01N 29/30 (2013.01); G01N 29/4427 (2013.01); G01N 29/4436 (2013.01); G01N 2291/101 (2013.01);
Abstract
Methods and apparatus to test acoustic emission sensors are disclosed herein. An example apparatus includes a process control device, an acoustic emission sensor coupled to the process control device, where the acoustic emission sensor detects an operational condition of the process control device, and a piezoelectric tuning fork acoustically coupled to the acoustic emission sensor to test the operational condition of the acoustic emission sensor.