Metering valve and device for dispensing a preferably cosmetic liquid
A metering valve ( 2 ) and a device ( 1 ) provided with it for metered dispensing of a preferably cosmetic liquid ( 3 ) and a process for producing such a metering valve ( 2 ) and a use of such a metering valve ( 2 ) are suggested. The metering valve has a valve element ( 6 ) with a spring section ( 21 ) which is elastic in the direction of motion and which bears a sealing element ( 14 ). This allows especially sealed contact with the assigned valve seat when the inlet valve ( 9 ) is closed.
1. Metering valve metered dispensing of a liquid, comprising:
a valve element that is movable between a closed position and an open position,
a valve housing,
a supply side inlet valve having a sealing element for sealing between the valve element and the valve housing in a closed position thereof, and
a dispensing side outlet valve,
wherein the valve element, by actuation thereof, is adapted to close the inlet valve before opening of the outlet valve for metered dispensing of a liquid,
wherein the valve element has a spring section, which is elastic in a direction in which the valve element is movable, and has an adjoining head section with the sealing element, and
wherein the sealing element is formed of a material that is one of softer and more elastic than that of the valve element and the valve housing.
2. Metering valve as claimed in claim 1 , wherein the sealing element has been injection molded onto the valve element.
3. Metering valve as claimed in claim 1 , wherein the valve element has been injection molded onto the sealing element.
4. Metering valve as claimed in claim 1 , wherein the sealing element is located in a region of a free end on the valve element.
5. Metering valve as claimed in claim 1 , wherein the sealing element forms the head section.
6. Metering valve as claimed in claim 1 , wherein the sealing element is molded onto the head section and has one of hemispherical and truncated conical shape.
7. Metering valve as claimed in claim 1 , wherein the sealing element has a truncated cone-shaped or rounded insertion region for engaging the valve housing.
8. Metering valve as claimed in claim 1 , wherein the sealing element and at least one of the valve element and the valve housing are formed in one piece with each other.
9. Metering valve as claimed in claim 1 , wherein at least one of the sealing element, the valve element and the valve housing is made of injection molded plastic.
10. Metering valve as claimed in claim 1 , wherein the sealing element made of an injection molded elastomer.
11. Metering valve as claimed in claim 1 , wherein at least one of the valve element and the valve housing is of polyamide or polyoxymethylene.
12. Metering valve as claimed in claim 1 wherein the inlet valve has a valve seat formed by the valve housing.
13. Metering valve as claimed in claim 12 , wherein the spring section allows tilting of the sealing element with the inlet valve closed for sealed contact with the valve seat.
14. Metering valve as claimed in claim 1 , wherein the valve element comprises both the inlet valve and also the outlet valve.
15. Device for metered dispensing of a liquid, comprising:
a container for the liquid, and
a metering valve,
wherein the metering valve comprises:
a valve element that is movable between a closed position and an open position,
a valve housing,
a supply side inlet valve having a sealing element for sealing between the valve element and the valve housing in a closed position thereof, and
a dispensing side outlet valve,
wherein the valve element, by actuation thereof, is adapted to close the inlet valve before opening of the outlet valve for metered dispensing of a liquid
wherein the valve element has a spring section, which is elastic in a direction in which the valve element is movable, and has an adjoining head section with the sealing element, and
wherein the sealing element is formed of a material that is one of softer and more elastic than that of the valve element and the valve housing.
16. Device as claimed in claim 15 , wherein the container is one of under pressure, pressurizable, and contains a propellant.
17. Device as claimed in claim 15 , wherein the liquid is an atomizable liquid.
18. Device as claimed in claim 15 , wherein the liquid is a liquid selected from the group consisting of a hair spray, a hair lacquer, a deodorant, a foam, a gel, a coloring spray, a sunscreen, a skin care agent, a cleaning agent and an air freshener.
19. Process for producing a metering valve for metered dispensing of a liquid, having a valve element that is movable between a closed position and an open position, a valve housing, a supply side inlet valve having a sealing element for sealing between the valve element and the valve housing in a closed position thereof, and a dispensing side outlet valve, wherein the valve element, by actuation thereof, is adapted to close the inlet valve before opening of the outlet valve for metered dispensing of the liquid and wherein the valve element has a spring section, which is elastic in a direction in which the valve element is movable, and has an adjoining head section with the sealing element, comprising the steps of injection molding at least one of the movable valve element and the valve housing of the metering valve from a plastic material, selecting a material for forming of the sealing element which is of one of softer or more elastic material than that of the valve housing, injection molding the sealing element from the selected material directly onto one of the valve element and the valve housing.
20. Process as claimed in claim 19 , wherein injection molding of the sealing element is performed in the same injection mold as used for said injection molding of said one of the valve element and valve housing.