Filling device for filling a defined quantity of a product

1. A filling device for dispensing a defined quantity of a product, comprising:

a piston pump for delivering the product to be dispensed from a reservoir to a filling needle,

wherein the piston pump comprises a piston, a cylinder body, an inlet, an outlet, a first non-return valve arranged at the outlet, and a second non-return valve arranged at the inlet,

wherein the piston, the cylinder body, the inlet, the outlet, the first non-return valve and the second non-return valve are made of a non-metallic material,

wherein the inlet includes a central axis and the outlet includes a central axis,

wherein the central axis of the inlet and the central axis of the outlet are arranged inclined at an angle within a range between 30° and 70° relative to an axis of the cylinder body,

wherein the inlet and the outlet are arranged in an upper region of the cylinder body,

wherein the first non-return valve is an umbrella valve and the second non-return valve is a duckbill valve, and

wherein a beak-shaped portion of the second non-return valve is surrounded by a corresponding opening geometry or orifice of the cylinder body that corresponds to the beak-shaped portion of the second non-return valve.

2. The filling device according to claim 1 , wherein the cylinder body comprises at least one wall region for fastening at least one nozzle.

3. The filling device according to claim 2 , wherein the wall region has at least one connection point for a nozzle and/or at least one receiving surface for a seal.

4. The filling device according to claim 1 , wherein at least one opening is provided in the cylinder body for receiving at least one of the non-return valves.

5. The filling device according to claim 1 , further comprising at least one nozzle for the inlet or outlet.

6. The filling device according to claim 5 , wherein at least one of the non-return valves at least partially covers at least one outer surface of a wall region of the cylinder body, so that the nozzle acts directly upon the at least one non-return valve.

7. The filling device according to claim 5 , wherein at least one seal is arranged between the nozzle and the cylinder body.

8. The filling device according to claim 1 , wherein the cylinder body has at least one interior space which has a trapezoidal cross section.

9. The filling device according to claim 1 , wherein the cylinder body has at least one recess and at least one interior space, wherein at least one receptacle for at least one of the non-return valves is provided between the recess and opens into a receiving surface or the interior space.

10. The filling device according to claim 1 , further comprising

a reservoir for storing the product to be dispensed,

a filling needle for dispensing the product to be dispensed,

a connecting line to connect the reservoir to the filling needle.

11. The filling device according to claim 10 , wherein the piston pump, the filling needle, a nozzle and the connecting line form an assembly which is designed as a single-use item.

12. The filling device according to claim 6 , wherein the nozzle acts directly upon on a flange of the non-return valve.

13. The filling device according to claim 7 , wherein the seal is an O-ring arranged between and contacting the nozzle and the cylinder body, and wherein the seal is positioned on a receiving surface of the cylinder body.