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 comprising:
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;
a metering element provided in the sealing member for metering out the liquid to be dispensed and forming drops of liquid, wherein the metering element comprises a flared shape;
a liquid-passing channel opening out into the metering element; and
a bearing element for bearing against the sealing member in front of a recessed zone and serving to deform the sealing member so that the sealing member takes up its non-return position.
2. The device according to claim 1 , wherein the sealing member is an elastomer element that is made entirely of elastomer.
3. 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.
4. The device according to claim 3 , wherein the metering element is formed in the rigid portion.
5. 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.
6. A device for dispensing predetermined metered quantities of liquid comprising:
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;
a metering element provided in the sealing member for metering out the liquid to be dispensed and forming drops of liquid, wherein the metering element comprises a flared shape;
a liquid-passing channel opening out into the metering element;
wherein the sealing member has a flexible portion, and the device further comprises a bearing element for bearing against the sealing member, serving to deform the flexible portion of the sealing member so that the sealing member takes up its non-return position.
7. The device according to claim 6 , wherein the sealing member is an elastomer element that is made entirely of elastomer.
8. The device according to claim 6 , wherein the sealing member comprises an elastomer portion and a rigid portion, said portions being constrained to move with each other.
9. The device according to claim 8 , wherein the metering element is formed in the rigid portion.
10. The device according to claim 6 , 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.
11. A device for dispensing predetermined metered quantities of liquid comprising:
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;
a metering element provided in the sealing member for metering out the liquid to be dispensed and forming drops of liquid, wherein the metering element comprises a flared shape;
a liquid-passing channel opening out into the metering element; and
wherein the flared shape of the metering element opens out into a cylindrical shape.
12. The device according to claim 11 , wherein the sealing member is an elastomer element that is made entirely of elastomer.
13. The device according to claim 11 , wherein the sealing member comprises an elastomer portion and a rigid portion, said portions being constrained to move with each other.
14. The device according to claim 13 , wherein the metering element is formed in the rigid portion.
15. The device according to claim 11 , 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.