Abstract: A check valve comprising, between an inlet end and an opposite outlet end along a common longitudinal axis, optionally an adapter arranged between the inlet end and a seal seat, a seal seat formed by a rigid scaffold, a closure element formed by an elastic closure part, optionally a stop ball, and optionally a stop that can be latched to the scaffold, wherein the scaffold and the closure part are shaped to match one another in the region of the seal seat, and the closure part is tensioned against the scaffold in the region of the seal seat in the rest position and is retained therein, wherein the scaffold has breaches in the region of the seal seat, and the closure element is formed in one piece with a venting device

Abstract: Integrated circuit housing composed of three coated dielectric plates. The integrated circuit housing with the three coated dielectric plates has a signal plane, a supply voltage plane and ground planes. Signal lines located in the signal plane are fashioned as triplate lines and for a reflection-free termination of the signal lines integrated resistors are provided in the signal plane. The supply voltage plane is insulated from the two surrounding ground planes by a coating of dielectric material.