Check valve with ventilation device

1 . A check valve comprising:

an inlet;

an outlet;

a rigid scaffold comprising breaches; and

an elastic closure part along a common longitudinal axis with the rigid scaffold between the inlet and the outlet, wherein the scaffold is between the closure part and the inlet, wherein the closure part sectionally projects with a venting section through an opening of the scaffold and comprises a passage in a direction toward the inlet, the passage being spaced from the scaffold,

wherein the scaffold and the closure part are shaped to match one another, wherein the inlet and the closure part taper in a funnel shape toward the inlet, and wherein the closure part is tensioned against the scaffold and held therein when the closure part is in a rest position.

2 . The check valve according to claim 1 , wherein the closure part is clamped to the scaffold by an undercut formed next to a bead in the opening of the scaffold.

3 . The check valve according to claim 1 , wherein the passage comprises a non-return closure.

4 . The check valve according to claim 1 , wherein the venting section of the closure part sectionally projects beyond a filling level of the check valve.

5 . The check valve according to claim 1 , comprising an elastic adapter having a first end and a second end along the common longitudinal axis, wherein first end is adjacent to the inlet and the second end is adjacent to the scaffold.

6 . The check valve according to claim 5 , wherein the adapter comprises a first section, an adjacent second section, and a circumferential bearing surface between the first section and the second sections, wherein the circumferential bearing surface extends transversely to the common longitudinal axis and the first section comprise a larger inner cross-section than an inner cross-section of the second section.

7 . The check valve according to claim 6 , wherein the adapter comprises a circumferential groove that divides the adapter into an inner section and an outer section, wherein the inner section and outer section comprise ends the are movable relative to each other.

8 . The check valve according to claim 1 , wherein the scaffold comprises contact webs on a first side, wherein the contact webs extend over a portion of the thickness of the scaffold.

9 . The check valve according to claim 5 , wherein the scaffold comprises a stop and a closure piece, wherein the closure piece is movable and is arranged between the stop and the closure part.

10 . The check valve according to claim 9 ,

wherein the stop comprises a center opening; and

wherein the closure piece comprises a diameter larger than the center opening and smaller than a diameter of the stop.

11 . The check valve according to claim 10 , consisting of the adapter, the scaffold, the closure part, the closure piece, and the stop.

12 . The check valve according to claim 1 , comprising a tube connected with a first tube end to the venting section, the tube extending through the closure part with and comprising a second tube end with a passive element, the tube comprising a kink the first tube end and the passive element.

13 . The check valve according to claim 12 , wherein the kink is located in a plane of a terminal cross-sectional opening of the closure part, wherein the terminal cross-sectional opening is opposite the venting section.

14 . The check valve according to claim 12 , wherein the passive element comprises a float or a weight with a density higher than water.

15 . A separation toilet comprising a check valve according to claim 1 .

16 . The check valve according to claim 9 , wherein the closure comprises an internally formed screw thread.