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:
May. 05, 2009
Filed:
May. 03, 2006
Toyonobu Sakurai, Tsukubamirai, JP;
Ikuo Kanzaka, Tsukubamirai, JP;
Toyonobu Sakurai, Tsukubamirai, JP;
Ikuo Kanzaka, Tsukubamirai, JP;
SMC Corporation, Chiyoda-ku, Tokyo, JP;
Abstract
The two-port valve comprises a main valve part which includes a valve seat disposed in the flow path, a valve element for opening and closing the flow path, and a rod coupled with the valve element and inserted into a through hole of a bonnet, and an operation part for driving the rod. The protection structure is provided in the two-port valve for protecting the rod seal member for the through hole from the fluid containing a depositional material. The protection structure includes ring-shaped abutting seal surfaces disposed in a wide area between a peripheral part of the valve element and an outer periphery of the rod for preventing the invasion of the fluid in a state of opening the valve. A ring-shaped elastic seal member is disposed on an inner end of the abutting seal surface.