Title:
CHECK VALVE AND LIQUID FEEDING PUMP
Document Type and Number:
WIPO Patent Application WO/2012/023201
Kind Code:
A1
Abstract:
The present invention is configured in such a manner that a valve chamber is formed within a valve element having a liquid inlet and a liquid outlet which are provided at positions facing each other, a ball is disposed within the valve chamber so as to be movable in the direction of the straight line connecting the liquid inlet and the liquid outlet, and a ball seat is fitted in the portion of the liquid inlet of the valve element. The ball seat is provided therein with a flow path having the liquid inlet, and the ball is adapted to be seated on the edge of the liquid inlet. The ball seat consists of a material having a hexagonal crystalline structure, and the material is worked by controlling the crystal axis direction so that the C-axis which is the crystal axis faces the same direction as the center axis of the flow path having the liquid inlet.
Inventors:
ASOU YOSHIAKI (JP)
Application Number:
PCT/JP2010/064045
Publication Date:
February 23, 2012
Filing Date:
August 20, 2010
Export Citation:
Assignee:
SHIMADZU CORP (JP)
ASOU YOSHIAKI (JP)
ASOU YOSHIAKI (JP)
International Classes:
F16K15/04; F04B53/10
Foreign References:
| JP2008164301A | 2008-07-17 | |||
| JP2005273514A | 2005-10-06 | |||
| JPH0440171U | 1992-04-06 | |||
| JP2008207992A | 2008-09-11 |
Attorney, Agent or Firm:
NOGUCHI SHIGEO (JP)
Shigeo Noguchi (JP)
Shigeo Noguchi (JP)
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Claims: