GATE VALVE FOR VACUUM AND SEAL MEMBER USED THEREFOR

WIPO Patent Application WO/2008/001683

A1

[PROBLEMS] To provide a gate valve for vacuum capable of preventing a seal member from being cracked due to stress concentration or particles from being produced even if the seal member is repeatedly compressed in the state that the adhesive agent is separated from the open side of a seal member mounting groove and capable of suppressing particles from being produced due to the rub of the seal top part with the seal surface. [MEANS FOR SOLVING THE PROBLEMS] In this gate valve for vacuum, the cross-section of the seal member is formed in a generally chevron shape with an apex (T). The gate valve is characterized in that an outer sloped surface (24d) is formed on the lateral outer side of the seal member mounting groove (23) outside from the apex (T), an inner sloped surface (24e) is formed on the lateral inner side of the seal member mounting groove (23) inside from the apex (T), the inclination of the outer sloped surface (24d) is θ1, the inclination of the inner side sloped surface (24e) is θ2, and the width of the bottom surface of the seal member mounting groove (23) is S, the apex (T) is positioned on the inner side of the seal member mounting groove (23) from the position by S/2, and θ1 is larger than θ2.

TSUJI KAZUAKI (JP)

PCT/JP2007/062576

January 03, 2008

June 22, 2007

Click for automatic bibliography generation  

NIHON VALQUA KOGYO KK (JP)
TSUJI KAZUAKI (JP)

F16K3/02; F16J15/10; F16J15/16; F16K51/02

JP2004286067A	2004-10-14
JPH11336905A	1999-12-07
JP2003049949A	2003-02-21
JP2001241553A	2001-09-07

SUZUKI, Shunichiro (Gotanda Yamazaki Bldg. 6F13-6, Nishigotanda 7-chome, Shinagawa-k, Tokyo 31, JP)

View/Download PDF      PDF Help

Previous Patent: FILM AND MOLD RELEASE FILM

Next Patent: METHACRYLIC RESIN COMPOSITION AND MOLDED ARTICLE THEREOF