Device for dispensing a liquid in the form of drops
The device makes it possible to dispense predetermined metered quantities of liquid. It includes a sealing member that can take up a liquid release position, allowing liquid to flow out of the device, and a non-return position preventing liquid from flowing back into the device. The sealing member is provided with metering means for metering out the liquid to be dispensed.
1. A device for dispensing predetermined metered quantities of liquid, which device includes a sealing member that can take up a liquid release position, allowing liquid to flow out of the device, and a non-return position preventing liquid from flowing back into the device, wherein the sealing member is provided with a metering element for metering out the liquid to be dispensed, the metering element for forming drops of liquid, the device including a liquid-passing channel opening out into the metering element and the metering element comprising a flared shape that flares from said channel.
2. The device according to claim 1 , including a bearing element for bearing against the sealing member, in register with a recessed zone, serving to deform the sealing member by bending deformation so that it takes up its non-return position.
3. The device according to claim 1 , wherein the sealing member is flexible at least in part, and the device includes a bearing element for bearing against the sealing member, serving to deform the flexible portion of the sealing member by compression deformation so that it takes up its non-return position.
4. The device according to claim 1 , wherein the flared shape opens out into a substantially cylindrical shape.
5. The device according to claim 1 , wherein the sealing member is an elastomer element that is made entirely of elastomer.
6. The device according to claim 1 , wherein the sealing member comprises an elastomer portion and a rigid portion, said portions being constrained to move with each other.
7. The device according to claim 6 , wherein the metering element is formed in the rigid portion.
8. The device according to claim 1 , wherein the portion of the sealing member that is provided with the metering element is disposed in the immediate vicinity of an orifice for releasing liquid from the device.