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. 06, 2018
Filed:
Sep. 11, 2014
Applicant:
Grundfos Holding A/s, Bjerringbro, DK;
Inventor:
Flemming Munk, Viborg, DK;
Assignee:
GRUNDFOS HOLDING A/S, Bjerringbro, DK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 27/08 (2006.01); G01N 27/06 (2006.01); F04D 15/02 (2006.01); G01N 29/032 (2006.01);
U.S. Cl.
CPC ...
G01N 27/06 (2013.01); F04D 15/0218 (2013.01); G01N 29/032 (2013.01);
Abstract
The dry running detection system for a pump includes an ultrasonic transducer () designed for arrangement inside a pump housing () and electrically connected to a frequency generator () producing an electrical signal having a predefined frequency. An analyzing unit () of the system analyzes the electrical signal applied to the ultrasonic transducer () and is designed to detect whether the ultrasonic transducer () is in contact with a liquid or not on basis of the signal level of the electrical signal.