US 12,233,811 B2
Knee airbag module
Sven Tamme, Alfdorf (DE)
Assigned to ZF AUTOMOTIVE GERMANY GMBH, Alfdorf (DE); and AUDI AG, Ingolstadt (DE)
Appl. No. 17/423,258
Filed by ZF AUTOMOTIVE GERMANY GMBH, Alfdorf (DE); and AUDI AG, Ingolstadt (DE)
PCT Filed Jan. 17, 2020, PCT No. PCT/EP2020/051108
§ 371(c)(1), (2) Date Jul. 15, 2021,
PCT Pub. No. WO2020/148419, PCT Pub. Date Jul. 23, 2020.
Claims priority of application No. 10 2019 101 284.8 (DE), filed on Jan. 18, 2019.
Prior Publication US 2022/0073028 A1, Mar. 10, 2022
Int. Cl. B60R 21/239 (2006.01); B60R 21/231 (2011.01); B60R 21/233 (2006.01); B60R 21/2338 (2011.01)
CPC B60R 21/239 (2013.01) [B60R 21/233 (2013.01); B60R 2021/23169 (2013.01); B60R 2021/23324 (2013.01); B60R 2021/23382 (2013.01); B60R 2021/2395 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A knee airbag module, comprising a knee airbag configured to inflate and deploy in front of a seated occupant between lower legs of the seated occupant and vehicle structure to which the knee airbag module is attached, the knee airbag comprising plural vertically arranged chambers that extend widthwise in the vehicle and are superimposed in the inflated state, including a middle, upper and lower chamber, wherein the middle chamber is directly coupled to the gas generator and is inflated first, wherein the lower chamber is fluid-communicated with the middle chamber via plural overflow openings and a valve device is configured at the overflow openings so that the overflow openings are open at the beginning of the deployment operation and the valve device closes the overflow openings in the course of the deployment operation.