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PUMP FOR COSMETIC PRODUCT VIAL, SEALED UNDER LOW-PRESSURE CONDITIONS
PUMP FOR COSMETIC PRODUCT VIAL, SEALED UNDER LOW-PRESSURE CONDITIONS
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机译：低压条件下密封的化妆品瓶的泵
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摘要
A pump for a vial intended to contain a cosmetic product. The pump includes a dosing chamber with a variable volume defined at least partially by a deformable element between an initial state and a deformed state. The pump further includes a guiding rod passing through the deformable element, the latter sliding along the rod when it undergoes a deformation. The deformable element includes an outlet lip delimiting an outlet orifice, surrounding a section of the rod, and bearing in a sealed manner against the rod or deviating from the rod according to the pressure in the chamber. The rod includes means for maintaining the outlet lip bearing in a sealed manner against the rod when the membrane is in the initial state thereof whatever the pressure in the chamber and whatever the pressure around the pump.
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