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. 19, 2023
Filed:
Feb. 07, 2020
Applicant:
Rosemount Tank Radar Ab, Mölnlycke, SE;
Inventors:
Jingdong Zhang, Slough, GB;
Tadewos Tzegazeab, Wokingham, GB;
Andrew David Mackrell, Basingstoke, GB;
Assignee:
ROSEMOUNT TANK RADAR AB, Mölnlycke, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01F 25/20 (2022.01); G01F 23/296 (2022.01); G01F 23/22 (2006.01);
U.S. Cl.
CPC ...
G01F 25/20 (2022.01); G01F 23/22 (2013.01); G01F 23/2967 (2013.01);
Abstract
The invention provides a method and apparatus for checking the condition of a self-oscillating vibrating fork level switch. The switch includes a test facility that operates when the switch is taken from a closed loop feedback operating mode into an open loop test mode. Amplitudes of the received test signals are subjected to comparison with predetermined thresholds to establish the health of the switch.