Spring for a check valve, check valve having a spring of this kind, controllable vibration damper having such a check valve, and motor vehicle having a controllable vibration damper of this kind

A check valve, comprising:

• a check valve with a valve seat,
• a sealing washer, with which the check valve is closable or is closed, when the sealing washer is in contact on the valve seat, and a spring, comprising:
• a laminar base body with a first surface, a second surface and a center point,
• two or more spring arms cooperating resiliently with the base body and which, in a relieved state, lift from the first surface or the second surface, wherein the spring arms form a free end and have a longitudinal axis that extends through the free end and tangentially to a circle about the center point of the base body,
• wherein a spring of the spring arms presses the sealing washer into contact onto the valve seat,
• wherein the base body of the spring comprises a reception cutout, and
• wherein the check valve comprises a receiving body onto which the spring is axially movable slidable, wherein the receiving body penetrates the reception cutout, and an abutment body with which the movability of the spring with respect to the receiving body can be delimited.