Centrifugal pump

Details Centrifugal pump Centrifugal pump

2007-02-27

2007-02-27

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

With shaft connected fluid force subjected thrust balancing...

Fluid force on opposite face of blade or blade support member

C416S23600R

Reexamination Certificate

active

10502873

ABSTRACT:
Centrifugal pump, in particular drain pump for washing machines, comprising a casing (10) that defines a chamber (11) within which an impeller formed by a hub (14) and a disk (15) provided with blades (16) is capable of rotating.The impeller is provided with at least a slit (20) adapted to generate a negative pressure on the rear surface of the disk (15) during the rotation of said impeller.The solution is very simple and rational; it enables a clogging of the impeller, as it may be caused by the presence of foreign matters and bodies in the washing liquor, to be avoided. It also enables axial thrusts, as they occur during the rotation of the impeller, to be compensated for.

REFERENCES:
patent: 3135211 (1964-06-01), Pezzillo
patent: 5156522 (1992-10-01), Tessier
patent: 5290236 (1994-03-01), Mathewson
patent: 5441535 (1995-08-01), Takahashi et al.
patent: 5542817 (1996-08-01), Brandt
patent: 100 21 057 (2001-11-01), None
patent: 0 599 138 (1994-06-01), None
patent: 99/39105 (1999-08-01), None

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