Dosing device for at least one medium
A dosing device for at least one medium includes a casing part connectable to a medium reservoir, having a pumping device located in the casing part and an applicator connected to the pumping device. The pumping device is provided with at least one inlet valve, as well as at least one outlet valve associated with the applicator and a stroke-movable pumping body. The casing part, applicator and all parts of the pumping device are provided coaxially to a pumping axis with plug connection sections. The casing part, applicator and the parts of the pumping device can be functionally assembled along the pumping axis to form the dosing device.
1. Dosing device for at least one medium with a casing part connectable to a medium reservoir, with a pumping device located in the casing part and with an applicator connected to the pumping device, said pumping device having at least one inlet valve, as well as at least one outlet valve associated with the applicator and a stroke-movable pumping body, wherein the casing part, applicator and all parts of the pumping device are provided coaxially to a pumping axis with plug connection sections by means of which the casing part, applicator and the parts of the pumping device can be assembled ready for functioning along the pumping axis to form the dosing device, wherein the pumping body and a bellows spring elastically returning the pumping body following a pumping movement are constructed as a common, integral continuous hollow body being open at two opposing ends and forming a common pumping area for the medium.
2. Dosing device according to claim 1 , wherein a plunger arranged coaxially in the pumping area and which forms the inlet valve for the pumping area is provided as part of the pumping device.
3. Dosing device according to claim 1 , wherein in particular at the outlet side of the pumping area is provided an outlet valve.
4. Dosing device according to claim 3 , wherein the outlet valve is integrally shaped onto an outlet-side bellows spring.
5. Dosing device according to claim 3 , wherein the outlet valve has a sealing section acting radially to the pumping axis.
6. Dosing device according to claim 5 , wherein additionally an axially acting sealing area is provided at the outlet valve.
7. Dosing device according to claim 2 , wherein an axial spacing of the plunger with respect to the outlet valve, in each case in their closed position, is smaller than a maximum operating stroke of the pumping device.
8. Dosing device according to claim 1 , wherein the applicator and pumping body are circumferentially engaged to one another so as to prevent twisting.
9. Dosing device according to claim 1 , wherein all parts of the pumping device, applicator and casing part are made from plastic.
10. Dosing device according to claim 1 , said pumping device further comprising a plunger forming said inlet valve and engaging said outlet valve to open said outlet valve during said pumping movement.
11. Dosing device for at least one medium with a casing part connectable to a medium reservoir, with a pumping device located in the casing part and with an applicator connected to the pumping device, said pumping device having at least one inlet valve, as well as at least one outlet valve associated with the applicator and a stroke-movable pumping body, wherein the casing part, applicator and all parts of the pumping device are provided coaxially to a pumping axis with plug connection sections by means of which the casing part, applicator and the parts of the pumping device can be assembled ready for functioning along the pumping axis to form the dosing device, wherein the pumping body is integrally formed with a bellows spring, forming a hollow body defining therein a continuous medium flow path from the inlet valve to the outlet valve.