Pumps – Motor driven – Pump within rotary working member
Patent
1991-10-07
1993-03-23
Smith, Leonard E.
Pumps
Motor driven
Pump within rotary working member
415900, 600 16, 623 3, F04B 1700
Patent
active
051958775
ABSTRACT:
A fluid pump with rotary impeller is disclosed which comprises an electromagnetically-driven, bearing-free, seal-free rotary impeller levitated by localized opposed, repulsive, permanent magnetic forces and by fluid forces, or by localized opposed repulsive magnetic forces only. Levitation by localized opposed magnetic or magnetic and fluid forces of an impeller driven by electromagnetic forces eliminates the need for bearings and seals in the driving mechanism. This avoids the heat build-up and leakage associated with other pumping mechanisms, which can be of importance in pumping of physiological fluids such as blood. The levitating forces of the present invention are applied repulsively both axially and radially with respect to the impeller and are auto-adjusting, such that any attempted displacement of the impeller will automatically incur a corrective change in levitating forces. The invention should be of use in numerous medical and non-medical applications where the benefits of impeller levitation by localized forces are apparent.
REFERENCES:
patent: 3957389 (1976-05-01), Rafferty et al.
patent: 4688998 (1987-08-01), Olsen et al.
patent: 4779614 (1988-10-01), Moise
patent: 4944748 (1990-07-01), Bramm et al.
LandOfFree
Fluid pump with magnetically levitated impeller does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fluid pump with magnetically levitated impeller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluid pump with magnetically levitated impeller will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1347690