VALVE ELEMENT PORTION AND GATE VALVE DEVICE

Title:

VALVE ELEMENT PORTION AND GATE VALVE DEVICE

Document Type and Number:

WIPO Patent Application WO/2007/148657

Kind Code:

A1

Abstract:

A valve element portion and a gate valve device which can reduce manufacturing costs through a small and simple structure and can rotary drive a valve element smoothly without moving it significantly in the center of rotation direction. When the valve element portion (52) is rotary driven by a valve element drive mechanism (54), the rotary drive radius (R2) on the opposite end sides of a first valve element portion (56) in the longitudinal direction becomes smaller than the rotary drive radius (R1) on the central side of the first valve element portion (56) in the longitudinal direction. Since a part of the valve element portion (52) does not touch (interfere with) a sidewall even if the sidewall is formed on longitudinal outside of the carry-in/carry-out opening (46) of the housing (44), the valve element portion (52) can be rotary driven by simply moving it in the center of rotation direction of the valve element portion (52) slightly without moving it significantly in its center of rotation direction.

Inventors:

NISHIBA TAKEHIRO (JP)

Application Number:

PCT/JP2007/062249

Publication Date:

December 27, 2007

Filing Date:

June 18, 2007

Export Citation:

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Assignee:

NIHON VALQUA KOGYO KK (JP)
NISHIBA TAKEHIRO (JP)

International Classes:

F16K1/24; F16K51/02; H01L21/02

Foreign References:

JP2006170373A	2006-06-29
JPH05306779A	1993-11-19
JP2001082613A	2001-03-30
JP2006057816A	2006-03-02
JPH10196806A	1998-07-31
JPS4614779B1
JP2002536597A	2002-10-29
JP2004076893A	2004-03-11
JPH0860374A	1996-03-05

Other References: