Brian J Ward

US Patent:

6997688, Feb 14, 2006

Filed:

Mar 6, 2003

Appl. No.:

10/383089

Inventors:

Manfred P. Klein - Highland Park IL, US
Brian C. Ward - Mount Prospect IL, US
Jeffrey S. Brown - Plainfield IL, US
Scott A. McAloon - Lombard IL, US
Peter E. Phelps - Darien IL, US

Assignee:

Innovative Mag-Drive, LLC - Chicago IL

International Classification:

F04B 17/00

US Classification:

417420, 41742311

Abstract:

A centrifugal pump includes a housing having a housing cavity, an inlet, and an outlet. A pump shaft is located within the housing cavity. A radial bearing coaxially surrounds the pump shaft. The shaft and the radial bearing are rotatable with respect to one another. An impeller is positioned to receive a fluid from the inlet and to exhaust the fluid to the outlet. The impeller has a first magnet assembly. A rotor has a second magnet assembly spaced apart from the first magnet assembly. A primary container is interposed between the impeller and the rotor. The primary container is arranged to contain a pumped fluid. A drive shaft is associated with the rotor for rotating the rotor. A secondary container contains the pumped fluid if the primary container leaks. The secondary container supports a generally dry-running seal (e. g. , non-lubricated seal) associated with the drive shaft.