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. 20, 1999
Filed:
Dec. 11, 1997
Gregory K Beaverson, York, PA (US);
Harold R Schnetzka, York, PA (US);
Timothy M Frank, Wellsville, PA (US);
York International Corporation, York, PA (US);
Abstract
A surge detection system for use in a fluid system having a load driven by a centrifugal compressor, the compressor being driven by an electric motor. The surge detection system comprises a means for sensing a differential pressure developed across the compressor and a means for sensing a current representing input power to the motor. The surge detection system further comprises a first computing means responsive to the differential pressure developed across the compressor for indicating when a valid surge is occurring in the compressor, and a second computing means responsive to the variable speed drive current for indicating when a valid surge is occurring in the compressor.