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Patent Searching and Data


Title:
SMALL-SIZED PUMP DEVICE AND ELECTRIC WATER HEATING POT
Document Type and Number:
Japanese Patent JP2000170682
Kind Code:
A
Abstract:

To make liquid be discharged efficiently, prevent cavitation, and make the liquid flow backward surely and smoothly.

A small pump device 1 is provided with an introducing part 10 for introducing liquid, a discharging part 11 for discharging the liquid introduced from the introducing part 10, and a liquid passage 12 for connecting the introducing part 10 to the discharging part 12. In the device, two sets of pumping mechanisms each consisting of a screw pump 13 having a lead screw 16 within a straight part of the liquid passage 12 and a centrifugal pump 14 having an impeller 17 are arranged on the same axis. The inside diameter in the straight part differs from place to place.


Inventors:
Yoshikawa, Shinichi
Nakasone, Takeshi
Application Number:
JP1998000366101
Publication Date:
June 20, 2000
Filing Date:
December 08, 1998
Export Citation:
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Assignee:
SANKYO SEIKI MFG CO LTD
ZOJIRUSHI CORP
International Classes:
A47J41/00; A47J27/21; A47J31/54; A47J41/02; F04D3/02; F04D13/02; F04D13/06; F04D29/00; F04D29/54; (IPC1-7): F04D3/02; A47J27/21; A47J41/00; A47J41/02; F04D29/54
Attorney, Agent or Firm:
渡辺 秀治