发明授权
US07614338B2 Piston, method of producing the piston, and pump having the piston
有权
活塞，活塞的制造方法以及具有活塞的泵
- 专利标题： Piston, method of producing the piston, and pump having the piston
- 专利标题（中）： 活塞，活塞的制造方法以及具有活塞的泵
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申请号： US11728556申请日： 2007-03-26
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公开(公告)号： US07614338B2公开(公告)日： 2009-11-10
- 发明人: Junichi Uehara , Kazukiyo Teshima
- 申请人： Junichi Uehara , Kazukiyo Teshima
- 申请人地址： JP Tokyo JP Osaka
- 专利权人： Toray Engineering Co., Ltd.,Nippon Pillar Packing Co., Ltd.
- 当前专利权人： Toray Engineering Co., Ltd.,Nippon Pillar Packing Co., Ltd.
- 当前专利权人地址： JP Tokyo JP Osaka
- 代理商 William L. Androlia; H. Henry Koda
- 优先权： JP2006-110749 20060413
- 主分类号： F04B43/00
- IPC分类号： F04B43/00 ; F04B53/00
摘要：
A piston 1 which is to be movably supported in a cylinder 11 of a pump 10 to be reciprocally driven is formed by a fluororesin so that it is not impaired by a corrosive liquid. A cylindrical outer peripheral portion 2 of the piston 1 has a thickness of 1 mm or less, and is flexible. The outer peripheral portion has a flange portion 7 in an open end portion via an approximately 180-degree folded-back portion 3. The flange portion 7 is attached to the cylinder 11. When the pump 10 is driven, the cylindrical outer peripheral portion 2 of the piston 1 smoothly rolls without producing deflections or bends in a gap between the outer peripheral face of a piston support member 15 and the inner peripheral face of the cylinder 11, while being in close contact with the two faces.
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