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发明申请
US20070240564A1 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

Piston, method of producing the piston, and pump having the piston
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.
摘要（中）：

可移动地支撑在泵10的可往复驱动的气缸11中的活塞1由氟树脂形成，使得其不受腐蚀性液体的损害。 活塞1的圆筒状的外周部2的厚度为1mm以下，柔软。 外周部通过大致180度的折回部3在开口端部具有凸缘部7。 凸缘部7安装在气缸11上。 当泵10被驱动时，活塞1的圆筒形外周部2平滑地滚动，而不会在活塞支撑构件15的外周面与气缸11的内周面之间的间隙中产生偏转或弯曲，同时 与两个面紧密接触。

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