Device for delivering a composition, the device including a membrane forming a check valve
AssigneeRexam Healthcare la Verpilliere
InventorsXavier Donnette, Jose Camba, Gaetan Painchaud, Sylvain Lanzi
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Abstract
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.
Claims16
A device for delivering a composition, the device comprising a piston having a support and a membrane, the support including a feed channel opening out via one or more feed orifices provided in the top end of the support, the membrane being mounted to slide in a metering chamber and comprising:
- a first sealing means forming a check valve, the first sealing means being capable of taking a liquid-blocking configuration by being pressed against the support;
- and
- a second sealing means enabling the membrane to slide in leaktight manner relative to the metering chamber;
- the first and second sealing means being 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 means, the rigid portion being distinct from the support.
Dependencies are inferred from the claim text.