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:
Apr. 16, 2019
Filed:
Dec. 14, 2015
Hitachi-ge Nuclear Energy, Ltd., Hitachi-shi, Ibaraki, JP;
Okano Valve Mfg. Co. Ltd., Kitakyushu-shi, Fukuoka, JP;
Yoshiharu Kawahara, Hitachi, JP;
Yoshihisa Kiyotoki, Hitachi, JP;
Takayoshi Nakashima, Hitachi, JP;
Keisuke Sakemura, Kitakyushu, JP;
Yoshitomo Kanemura, Kitakyushu, JP;
Yukio Imoto, Kitakyushu, JP;
Hitachi-GE Nuclear Energy, Ltd., Hitachi-shi, JP;
Okano Valve Mfg. Co. Ltd., Kitakyushu-shi, JP;
Abstract
A butterfly valve includes a valve body-side valve seat section, a valve box-side valve seat section, and a valve movement mechanism. The valve movement mechanism includes a cam groove, a cam projection, and a reverse key. The valve movement mechanism moves the valve body in an extending direction of the flow passage along with rotation of the valve shaft between a blocking position and an open position. One of the valve body-side valve seat section and the valve box-side valve seat section is formed of a laminated material composed of alternatingly stacked plates made of metal and plates made of expanded graphite.