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:
Sep. 14, 1999
Filed:
Sep. 24, 1997
Mark S Piercey, Sudbury, MA (US);
Frederic W Buse, Allentown, PA (US);
Ingersoll-Dresser Pump Co., Liberty Corner, NJ (US);
Kaman Electromagnetics Corp., Hudson, MA (US);
Abstract
A diaphragm system is provided for isolating a motor stator from pumped fluid in a seal-less integral-motor pump, the pump having a non-rotating shaft fixed to a motor housing containing the motor stator, the shaft extending into a pump casing within which an impeller is integrated with a motor rotor. The diaphragm system includes a non-metallic diaphragm having a periphery, which conforms to and is clamped between mating surfaces of the housing and the pump casing, and a central circular hole, which surrounds the shaft and is clamped thereby against the housing. Clamping pressure on the diaphragm is limited, and static and dynamic bearing forces are passed directly from the shaft to the housing to minimize creep distortion of the diaphragm which could cause early failure of the pump.