Title:
SELF-PRIMING PUMP
Document Type and Number:
Japanese Patent JP2010285972
Kind Code:
A
Abstract:
To prevent the generation of a cavitation even if the rotation speed of a motor is set high in a self-priming pump including a casing, the motor and an impeller rotatively driven by the motor in which the casing has an impeller chamber receiving the impeller, a suction chamber 15 communicating with a suction part of the impeller chamber and a discharge chamber 16 communicating with a discharge part of the impeller chamber.
A circulation path 18 always opened is formed for circulating water in the discharge chamber 16 to a downstream end of the suction chamber 15 facing the suction part of the impeller chamber.
Inventors:
MIYATA MITSURU
MATSUI SHINJI
MATSUI SHINJI
Application Number:
JP2009142641A
Publication Date:
December 24, 2010
Filing Date:
June 15, 2009
Export Citation:
Assignee:
RINNAI KK
International Classes:
F04D9/02; F04D29/00; F04D29/44; F04D29/66
Domestic Patent References:
JP2002005067A | 2002-01-09 | |||
JP2003269360A | 2003-09-25 | |||
JP2002005074A | 2002-01-09 | |||
JP2006037843A | 2006-02-09 |
Attorney, Agent or Firm:
Masaaki Yamashita
Atsuko Oaku
Atsuko Oaku