发明授权
US08408428B2 Device for delivering a composition, the device including a membrane forming a check valve 有权
用于输送组合物的装置,该装置包括形成止回阀的膜

Device for delivering a composition, the device including a membrane forming a check valve
摘要:
The device includes a membrane slidably mounted in a metering chamber, the membrane including a first sealing element forming a check valve, and a second sealing element enabling the membrane to slide in a leaktight manner relative to the metering chamber. The first and second sealing elements are made of a material that is relatively flexible, the membrane also including a rigid portion made of a material that is more rigid than the material of the first and second sealing elements.
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