Valve for the application of drops
A valve ( 20 ) comprises a housing body ( 22 ) with a discharge channel ( 34 ), whereby an elastically-deformable membrane ( 24 ) is provided in the housing body which seals off the discharge channel. The membrane is sealed at the front end thereof and is arched to form a dome.
1. A valve for the drop application of a liquid stored in a container comprising a take-up body which has a discharge passage for the liquid, and a single elastically deformable membrane which is closed at its front end arranged in the take-up body and sealingly closing the discharge passage, the take-up body having an aeration passage extending through the take-up body for a follow-up air flow, the membrane also sealingly closing the aeration passage.
2. A valve in accordance with claim 1 , wherein the front end of the membrane has an arched in dome-shape.
3. A valve in accordance with claim 1 , wherein the front end of the membrane projects out of the take-up body.
4. A valve in accordance with claim 1 , wherein the membrane is made as a hollow body open at one end.
5. A valve in accordance with claim 1 , including a support element which pre-stresses the membrane in the axial direction and is arranged in an interior of the membrane.
6. A valve in accordance with claim 1 , including a support element provided in the interior of the membrane and which is in engagement with the membrane via at least one latching means.
7. A valve in accordance with claim 1 , including a support element which is provided for the membrane is in engagement with the take-up body via at least one latching means.
8. A valve in accordance with claim 1 , including a support body provided for the membrane and extending from beneath an aeration passage in the take-up body up to and into a region of the upper end of the membrane.
9. A valve in accordance with claim 1 , including a support body 6 for the membrane and extending over a total inner cross-section of the take-up body at its lower end and having at least one throughflow opening in a vicinity of the lower end.
10. A valve in accordance with claim 1 , including a support body and wherein a ring passage is provided between the support body and the membrane.
11. A valve in accordance with claim 1 , wherein the take-up body and the membrane define a ring passage between them.
12. A valve in accordance with claim 10 , including first and second ring passages between the take-up body and the membrane; and at least one overflow passage in the membrane connecting the first and second ring passages to one another.
13. A valve in accordance with claim 1 , wherein the membrane and the take-up body sealingly contact one another along a contact section configured as a paraboloid of revolution.
14. A valve in accordance with claim 13 , wherein a ring passage is provided at a start of the contact section and an outflow passage is provided at an end of the contact section.
15. A valve in accordance with claim 1 , including a sterile filter in the take-up body in front of the orifice of the aeration passage.
16. A valve in accordance with claim 1 , comprising only three functional components, namely the take-up body, the membrane and a support body.
17. A dropper system comprising a container and a valve in accordance with claim 1 .