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Patent Searching and Data


Title:
SELF-PRESSURE OPENING AND CLOSING TYPE PUMP DEVICE
Document Type and Number:
Japanese Patent JP2005291150
Kind Code:
A
Abstract:

To provide a self-pressure opening and closing type pump device which can keep an opening and closing valve closed when a pressure feed pump is operated and can keep it open when a pressure feed pump is stopped so as to be able to adjust the degree of opening of the opening and closing valve.

A pressure introducing passage 52 which introduces the ejection pressure of an electrically powered air pump 12 into a pressure chamber 44 is mounted such as to be openable and closable by means of a pressure chamber control valve 53. (1) The opening and closing valve 13 can be kept closed by closing the pressure introducing passage 52 when the electrically powered air pump 12 is operated. (2) The opening and closing valve 13 can be kept open by closing the pressure introducing passage 52 while supplying the ejection pressure of the electrically powered air pump 12 to the pressure chamber 44. (3) The degree of opening of the opening and closing valve 13 can be optionally adjusted by adjusting the pressure of the pressure chamber 44 using a three-way valve for the pressure chamber control valve 53.


Inventors:
Tsuzuki, Kunihiro
Yokoyama, Shinichi
Uchida, Akikazu
Application Number:
JP2004000109947
Publication Date:
October 20, 2005
Filing Date:
April 02, 2004
Export Citation:
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Assignee:
DENSO CORP
International Classes:
F01N3/22; F01N3/32; F01N11/00; F02B33/44; F04D23/00; F04D27/00; F04D27/02; F25J1/00; F01N3/20; F01N3/30; (IPC1-7): F01N3/32; F01N3/22
Attorney, Agent or Firm:
石黒 健二