Pneumatic element

A pneumatic element for a vehicle seat of a motor vehicle, comprising:

• a first, a second and a third air chamber, which are coupled to one another, wherein the first air chamber is coupled to the second air chamber by means of a weld joint, and the second air chamber is coupled to the third air chamber by a further weld joint,
• an overflow area, which Is arranged within the weld joints along a longitudinal axis of the pneumatic element, for pneumatic communication between the first, second, and third air chambers,
• wherein the first, second, and third air chambers each have a first state in which a pressure in the interior of the first, second, and third air chambers corresponds to a pressure outside the first, second, and third air chambers, and have a second state in which the pressure in the interior of the first, second, and third air chambers is greater than the pressure outside the first, second, and third air chambers,
• a flow opening for pneumatic communication between the overflow area and the second air chamber in the first state, and
• in which the profile of at least one of the weld joints has:
• a first area which has a first spacing from the longitudinal axis,
• a second area which adjoins the first area and which has a second spacing from the longitudinal axis,
• a third area which adjoins the second area and which has the first spacing from the longitudinal axis,
• a fourth area which adjoins the third area and which has the second spacing from the longitudinal axis,
• a fifth area which adjoins the fourth area and which has the first spacing from the longitudinal axis,
• a sixth area which adjoins the fifth area and which has the second spacing from the longitudinal axis,
• a seventh area which adjoins the sixth area and which has the first spacing from the longitudinal axis,
• an eighth area which adjoins the seventh area and the first area and which has the second spacing from the longitudinal axis, wherein the first spacing differs from the second spacing.

A pneumatic element for a vehicle seat of a motor vehicle, comprising:

• a first, a second and a third air chamber, which are coupled to one another, wherein the first air chamber is coupled to the second air chamber by means of a weld joint surrounding a first opening having a first shape, and the second air chamber is coupled to the third air chamber by a further weld joint surrounding a second opening having a second shape,
• an overflow area, which Is arranged within the weld joints along a longitudinal axis of the pneumatic element, for pneumatic communication between the first, second, and third air chambers,
• wherein the first, second, and third air chambers each have a first state in which a pressure in the interior of the first, second, and third air chambers corresponds to a pressure outside the first, second, and third air chambers, and have a second state in which the pressure in the interior of the first, second, and third air chambers is greater than the pressure outside the first, second, and third air chambers,
• a flow opening for pneumatic communication between the overflow area and the second air chamber in the first state, and
• the first shape of the first opening surrounded by the weld joint has a profile transversely with respect to the longitudinal axis and the second shape of the second opening surrounded by the further weld joint has a profile transversely with respect to the longitudinal axis, wherein the two profiles differ from each other in order to form the flow opening.