Patent ID: 8424528

Claim:
A ventilation device, comprising a ventilation mask configured to be connected to a respiratory gas hose and having a respiratory gas hose coupling movably connected by a joint with a base of the ventilation mask, wherein the joint is comprised of a ball-and-socket joint, the joint having an inner part shaped as a spherical segment and an outer shell for guiding the inner part, and wherein the outer shell is constructed from at least two shell segments that can be connected with each other, wherein the first shell segment is formed on the base of the mask, wherein the second shell segment is a ring installed near a securing device, wherein the outer shell is formed at least over portions thereof in the form of spherical segments, wherein the spherical segments extend spherically in a direction of a longitudinal axis of the joint, wherein the joint has a joint contour due to the spherical configuration of the joint segments which extends around the longitudinal axis as well as in the direction of the longitudinal axis in such a way that different portions of the joint parts are located at different distances from the longitudinal axis, and wherein there is line contact between the first shell segment and the inner part, wherein the securing device is clamped to the first shell segment.