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:
Apr. 15, 2014
Filed:
Jul. 25, 2008
Bajram Zeqiri, Middlesex, GB;
Bajram Zeqiri, Middlesex, GB;
The Secretary of State for Trade and Industry, London, GB;
Abstract
There is disclosed an apparatus and method for detecting cavitation in fluid machines, for example pumps (). In one embodiment a piezoelectric gasket () is used as a sensor to sense cavitation. In some embodiments highpass filters (), () are used to detect ultrasonic acoustic signals in about the MHz range. If the energy in the MHz range is excessive then cavitation is deemed to be occurring and the speed of a motor () may be reduced in proportion to the degree of cavitation deemed to be occurring. In another embodiment (FIG.) the energy in the MHz range is normalized against the energy in the kHz range. Other sensors () are also disclosed.