Title:
GATE VALVE
Document Type and Number:
Japanese Patent JP2631594
Kind Code:
B2
Abstract:
PURPOSE: To simplify and make compact a gate valve used in a high purity gas system and a super-high vacuum system, and enable an operation power source or the like to be easily maintained by generating an operation force to seal a valve plate outside a valve box for enabling the valve plate to be made of a simple plate material and eliminating a drive section from a system.
CONSTITUTION: A valve plate 6 for opening and closing the through-hole 4 of a valve box 1 is so supported as to be movable between a close position and an open position. A presser member 14 for keeping the valve plate 6 in pressed contact with a seal section around the hole 4 is provided at the vicinity of the rear side of the valve plate 6 at the close position, and an operation force source 16 for pressing the valve plate 6 against the seal section is installed outside the valve box 1. A pressing force transmission mechanism 17 ranging from the source 16 to the presser member 14 is isolated from the valve chamber 11 within the valve box 1 with bellows 20 and 21 laid between the box 1 and the member 14.
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Inventors:
ISHIGAKI TSUNEO
WARATANI KENJI
WARATANI KENJI
Application Number:
JP35370591A
Publication Date:
July 16, 1997
Filing Date:
December 18, 1991
Export Citation:
Assignee:
ESU EMU SHII KK
International Classes:
F16K3/02; F16K3/18; F16K41/10; F16K51/02; (IPC1-7): F16K3/02
Domestic Patent References:
| JP5732266U | ||||
| JP59152252U | ||||
| JP5637171Y2 |
Attorney, Agent or Firm:
Hiroshi Hayashi (2 outside)