发明授权
- 专利标题: Check valve
- 专利标题(中): 止回阀
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申请号: US650630申请日: 1991-02-05
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公开(公告)号: US5107885A公开(公告)日: 1992-04-28
- 发明人: Masahiko Nakazawa , Hisayoshi Matsumoto
- 申请人: Masahiko Nakazawa , Hisayoshi Matsumoto
- 申请人地址: JPX Kumamoto
- 专利权人: Kiyohara; Masako
- 当前专利权人: Kiyohara; Masako
- 当前专利权人地址: JPX Kumamoto
- 优先权: JPX2-84772[U] 19900809
- 主分类号: F16K15/02
- IPC分类号: F16K15/02 ; F16K15/14
摘要:
A check valve comprises a valve body having inlet and outlet passages and a cavity in which a diaphragm operates. The inlet passage connects with the cavity through an upstream wall partly defining the cavity and the outlet passage connects with the cavity through a downstream wall partly defining the cavity. The diaphragm has an annular sheet metal part which is secured to one of the walls and carries a movable seal. The movable seal cooperates with a sealing element to provide a circular fluid seal. In a first embodiment, the inlet passage connects with the cavity through openings located inside the periphery of the circular fluid seal. In a second embodiment the inlet passage connects with the cavity through openings located outside the periphery of the circular fluid seal. The movable seal may be a sealing surface in which case the sealing element is a seal ring, or the movable seal may comprise a seal ring in which case the sealing element is a sealing surface.