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. 20, 1990
Filed:
Aug. 04, 1988
Dieter Busch, Ismaning, DE;
Heinrich Lysen, Munich, DE;
Pruftechik, Dieter Busch & Partner GmbH & Co., Ismaning, DE;
Abstract
The invention provides a device for monitoring pumps to detect danger of damage by cavitation. One object of the invention is to provide a device for this purpose which is simple in design, is readily handled, simple to attach to the pump to be monitored and permanently and straightforwardly indicates if there is cavitation and if so to what degree. These objects are to be attained by a monitoring device for use with a pump comprising a housing with rigid wall part capable of participation in vibratory motion and having an external sensing surface for application on the wall part on a pump housing, an inertial mass arranged in the housing, a piezoelectric vibration transducer held between the inertial mass and the wall part capable of participating in vibration, said transducer being adapted to respond to vibrations of the said wall part, and electric circuitry with a display able to be seen from a point outside the housing to indicate an AC output of the piezoelectric transducer in excess of a certain threshold.