The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 29, 2002
Filed:
Oct. 06, 2000
Wun-Chang Shih, Hsinchu, TW;
Dong-Cheh Ju, Hsinchu, TW;
Yun-Chuan Tu, Hsinchu, TW;
Yung-Tien Peng, Hsinchu, TW;
Abstract
A novel gas control module switch mechanism includes a diaphragm means, a valve body, a piston means and a fastening means. The diaphragm means has a plurality of diaphragms and a seal plate sandwiched between a first and a second diaphragm. The first diaphragm has a center opening to prevent the first diaphragm from making direct sealing contact. Sealing is done through the seal plate. The seal plate is made of a soft material for obtaining improved sealing effect and longer durability. The valve body has a bulged ring around an opening plane and a bulged body ring for enhancing sealing effect when the seal plate making contact with the bulged ring.