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Patent Searching and Data


Title:
CENTRIFUGAL PUMP
Document Type and Number:
WIPO Patent Application WO/1999/030039
Kind Code:
A1
Abstract:
A centrifugal pump capable of solving various problems which would otherwise have been caused in centrifugal pumps having an impeller rotatably received within a casing formed with a suction port and a discharge port and made of stainless steel. According to the invention, a centrifugal pump comprises a casing (C) formed with a suction port (I) and a discharge port (E) and made of stainless steel and an impeller (1- 1-7) rotatably received within the casing (C), with the pump (P) and drive means (M) arranged vertically. A working fluid is a water mixed with foreign matters (EJ, EJ-1), and a semi-open type impeller and a closed impeller are constructed so that they can be interchanged with each other. If vanes can be interchanged depending upon a kind of foreign matters or a kind of wastes mixed in a water being treated, a demand to use a variety of impellers for the same casing can be met. Further, even when the vanes are interchanged by different ones, a substantial change in an amount of foreign matters passing through the pump does not occur.

Inventors:
Nakatsukasa, Yukimasa (Ebara Corporation, 11-1 Haneda Asahich, Ohta-ku Tokyo 144, JP)
Application Number:
PCT/JP1997/004485
Publication Date:
June 17, 1999
Filing Date:
December 08, 1997
Export Citation:
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Assignee:
EBARA CORPORATION (11-1, Haneda Asahicho Ohta-ku, Tokyo 144, JP)
Nakatsukasa, Yukimasa (Ebara Corporation, 11-1 Haneda Asahich, Ohta-ku Tokyo 144, JP)
International Classes:
F04D7/04; F04D13/08; F04D29/04; F04D29/044; F04D29/42; (IPC1-7): F04D29/04
Foreign References:
JPS6328896U1988-02-25
JPH03130600A1991-06-04
JPS5787169U1982-05-29
JPS5697591U1981-08-01
JPH0932791A1997-02-04
JPS5542272B21980-10-29
JPS5435842Y21979-10-30
Attorney, Agent or Firm:
Takahashi, Toshitada (Fujiki Building, 13-3 Nishishinbashi 2-chom, Minato-ku Tokyo 105, JP)
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