Pumps – Motor driven – Electric or magnetic motor
Patent
1997-06-30
1999-11-30
Freay, Charles G.
Pumps
Motor driven
Electric or magnetic motor
41742314, 4151732, 4151741, F04B 1700
Patent
active
059931760
ABSTRACT:
A magnetically-driven centrifugal pump comprises a pump body having a pump chamber extending therein from a pump body open end to a pump body closed end, and includes a liquid inlet port and a liquid outlet port for accommodating passage of liquid to and from the pump chamber. An outer magnet assembly is disposed concentrically around the pump chamber and attached to a drive means. An inner magnet assembly is disposed within the pump chamber and is mounted to a shaft that is rotatably mounted within the pump chamber. An impeller is attached to the inner magnet assembly and is mounted to the shaft. Together, the shaft, inner magnet assembly and impeller are rotated within the pump chamber by magnetically coupling with the outer magnet assembly. A diaphragm is disposed within the open end of the pump body and is positioned adjacent the impeller. The diaphragm includes a sleeve that extends radially therefrom and is adapted to form a leak-tight seal with the pump body without the use of O-ring seals. The diaphragm sleeve facilitates axial displacement of the diaphragm relative to the pump body to adjust the spatial distance between the impeller and diaphragm to zero tolerance after the pump has been assembled. Such adjustment feature minimizes pressurized liquid bypass from an impeller cavity of the pump, and maximizes pump output pressure and pump efficiency. The pump includes means for axially displacing the diaphragm, and fixing the axial displacement of the diaphragm, to achieve a determined pump output pressure after the pump has been assembled.
REFERENCES:
patent: 4013384 (1977-03-01), Oikawa
patent: 4722661 (1988-02-01), Mizuno
patent: 4828454 (1989-05-01), Morris et al.
patent: 5169286 (1992-12-01), Yamada
patent: 5211530 (1993-05-01), Shiffler
patent: 5334004 (1994-08-01), Lefevre et al.
patent: 5525039 (1996-06-01), Sieghartner
Kingsford Kenji A.
Nguyen Hy Ba
Freay Charles G.
Furon Company
LandOfFree
Magnetically-driven centrifugal pump does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetically-driven centrifugal pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetically-driven centrifugal pump will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1664473