Title:
AIR PASSAGE CHANGEOVER DEVICE AND AIR PUMP
Document Type and Number:
Japanese Patent JP2003074721
Kind Code:
A
Abstract:
To positively perform the operation of a valve element and sealing by the valve element and to dissolve fluid sound and pressure loss.
This air passage changeover device 25 changeover-connects an air inflow port 22a to air outflow ports 23a, 24a of other two branch chambers 15, 17 by communicating three branch chambers 15, 16, 17 by communicating holes 14a formed in a pair of opposed partition walls 14, and arranging a valve element 21 in the center branch chamber 16 with the air inflow port 22a to change the opening/closing of two communicating holes 14a by the valve element 21. In this case, the valve element 21 is formed of a complete spherical body.
Inventors:
TANAKA ATSUSHI
KUNUGIHARA TAKASHI
NODA TOMOYASU
KUNUGIHARA TAKASHI
NODA TOMOYASU
Application Number:
JP2001268622A
Publication Date:
March 12, 2003
Filing Date:
September 05, 2001
Export Citation:
Assignee:
SHIN MEIWA IND CO LTD
International Classes:
F04B39/00; F04B41/00; F16K11/044; (IPC1-7): F16K11/044; F04B39/00; F04B41/00
Attorney, Agent or Firm:
Hiroshi Maeda (7 outside)
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