Patent ID: 9630532
Date: 2017-04-25
CPC Classifications: B60N,F16K,Y10S,Y10T

Claim:
1. 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 at least one of the first and second shades of the openings has a profile which, transversely with respect to the longitudinal axis, has at least two different spacings from the longitudinal axis relative to a profile of the other one of the first and second shapes of the openings in order to form the flow opening.