Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METALLIC DIAPHRAGM TYPE VALVE
Document Type and Number:
Japanese Patent JP3764574
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To prevent cracking developed on an inner circumferential edge part of a diaphragm by repeating opening/closing of a valve, and suppress engagement of a fluid to a lower surface side of the inner circumferential edge part of the diaphragm so as to improve a replaceability, in a metallic diaphragm type valve.
SOLUTION: In a valve composed of a body 1 provided with a fluid inlet passage 1a, a fluid outlet passage 1b, a valve chest, and a valve seat 1d, a stem 3 arranged freely to move vertically, a seat holder 5, and a metallic diaphragm 7 which is arranged upward the valve chest penetrating the supporting shaft part 5a of the seat holder 5 and for airtightly sealing an opening arranged upward the valve chest; a diaphragm supporting stage part 5c provided with an annular flat part and a shoulder part on an upper surface is formed on a supporting shaft part 5a of the seat holder 5, and also an invented tray shaped deflection limitter 6 is arranged, its flat part, the inner circumferential edge part of the metallic diaphragm 7, and the flat part of a diaphragm supporting stage part 5c are welded along its full circumference, and fixed and integrated with each other.


Inventors:
Shuhei Ogawa
Kazuhiro Yoshikawa
Application Number:
JP34029197A
Publication Date:
April 12, 2006
Filing Date:
December 10, 1997
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
Fujikin Co., Ltd.
International Classes:
F16K1/00; F16K1/02; F16K1/32; F16K1/50; (IPC1-7): F16K1/00; F16K1/02; F16K1/32; F16K1/50
Domestic Patent References:
JP8114265A
JP63072984A
JP62093469U
JP8219304A
JP8219303A
Attorney, Agent or Firm:
Takeshi Sugimoto