Title:
薬液弁
Document Type and Number:
Japanese Patent JP4142883
Kind Code:
B2
Abstract:
A diaphragm valve capable of increasing durability of a diaphragm comprises a valve body internally formed with a valve chamber having an open upper end and a suck-back chamber having an open lower end, between an inlet passage and an outlet passage, and a through hole which provides communication between the valve chamber and the suck-back chamber. The open end of the valve chamber is closed by a first diaphragm which is brought into and out of contact with a valve seat. The open end of the suck-back chamber is closed by a second diaphragm. The first and second diaphragms are substantially identical in shape. Each circumferential edge portion of the first and second diaphragms is tightly retained by a retaining member mountable to the valve body so that the diaphragms are curved outwardly with respect to the valve chamber and the suck-back chamber respectively. The first and second diaphragms are connected by a connecting rod passing through the through hole so that the diaphragms are deformed synchronously by operation of an actuator.
Inventors:
Eitaro Ichi
Shigeru Osugi
Shigeru Osugi
Application Number:
JP2002077522A
Publication Date:
September 03, 2008
Filing Date:
March 20, 2002
Export Citation:
Assignee:
CKD Corporation
International Classes:
F16K7/17; F16K31/126; F16K41/12
Domestic Patent References:
| JP10252918A | ||||
| JP6386476U | ||||
| JP3115267U | ||||
| JP537731U |
Attorney, Agent or Firm:
Patent Business Corporation Cosmos Patent Office