Invention Grant
- Patent Title: Coupling member of pipe coupling
- Patent Title (中): 管接头联接件
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Application No.: US11823431Application Date: 2007-06-27
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Publication No.: US07708029B2Publication Date: 2010-05-04
- Inventor: Hiroyuki Kitagawa , Masayuki Imaizumi , Koji Matsumoto
- Applicant: Hiroyuki Kitagawa , Masayuki Imaizumi , Koji Matsumoto
- Applicant Address: JP Tokyo
- Assignee: Nitto Kohki Co., Ltd.
- Current Assignee: Nitto Kohki Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Brinks Hofer Gilson & Lione
- Priority: JP2004-381060 20041228
- Main IPC: F16L37/32
- IPC: F16L37/32
Abstract:
A coupling member is provided that comprises a valve movable between a closed position and an opening position. The valve is provided with a seal ring fixed in an annular groove formed in the valve and urged against a valve seat in the closed position. The groove has a forward annular groove portion and a rear annular groove portion shallower than the forward annular groove portion. The seal ring has forward and rear annular seal portions fitted in the forward and rear annular groove portions, respectively. The rear ring portion has substantially the same diameter as the forward seal portion.
Public/Granted literature
- US20070246107A1 Coupling member of pipe coupling Public/Granted day:2007-10-25
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