Water pump with a hollow shaft, seal, and drain opening therein

Details Water pump with a hollow shaft, seal, and drain opening therein Water pump with a hollow shaft, seal, and drain opening therein

2005-11-01

2005-11-01

Thorpe, Timothy S. (Department: 3746)

Pumps

Motor driven

Pump and motor interconnected by endless flexible...

C417S364000, C417S313000, C417S063000

Reexamination Certificate

active

06960066

ABSTRACT:
A water pump includes a rotation member, a hollow shaft portion having an opening on one end and connected to the rotation member for unitary rotating with the rotation member, an impeller connected to the shaft portion for unitary rotating with the shaft portion, a body defining a fluid chamber in which the impeller is rotated, a bearing for rotatably supporting the shaft portion on the body, a sealing member provided between the shaft portion and the body for sealing the fluid chamber and a cover portion for substantively closing the opening of the shaft portion.

REFERENCES:
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patent: 4890946 (1990-01-01), von Pragenau
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patent: 5026253 (1991-06-01), Börger
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patent: 5795137 (1998-08-01), Ozawa et al.
patent: 6561756 (2003-05-01), Ozawa et al.
patent: 6561770 (2003-05-01), Okuda
patent: 2002/0034438 (2002-03-01), Ozawa et al.
patent: 0 289 958 (1988-11-01), None
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patent: 4-262096 (1992-09-01), None
patent: 404250306 (1992-12-01), None
patent: 11-336699 (1999-12-01), None

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