Refrigeration – Structural installation – With electrical component cooling
Reexamination Certificate
2006-12-12
2006-12-12
Jones, Melvin (Department: 3744)
Refrigeration
Structural installation
With electrical component cooling
C062S003300
Reexamination Certificate
active
07146822
ABSTRACT:
Embodiments of the invention provide a compact, seal-less, centrifugal liquid pump with a perimeter magnetic drive that is substantially smaller than a conventional centrifugal liquid pump having magnets attached directly to the impeller shaft. Because rotational force is applied at the perimeter of the impeller, rather than at the shaft, embodiments of the invention have lower torque requirements and rotational speed, increasing the life of the pump bearings. Additionally, embodiments of the invention may suspend the pump bearings by using a redirected flow of liquid coolant, further increasing the bearing life.
REFERENCES:
patent: 4065232 (1977-12-01), Stratienko
patent: 4272084 (1981-06-01), Martinson et al.
patent: 5184945 (1993-02-01), Chi-Wei
patent: 5336064 (1994-08-01), Lamers
patent: 6308524 (2001-10-01), Mochizuki et al.
patent: 3536140 (1987-04-01), None
Jones Melvin
Marger Johnson & McCollom PC
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