US 12,089,352 B2
Pressure equalising device and housing comprising the pressure equalising device
Christopher Schaefer, Ober-Ramstadt (DE); Ingo Stephan, Rimbach (DE); and Markus Filler, Grasellenbach (DE)
Assigned to CARL FREUDENBERG KG, Weinheim (DE)
Appl. No. 18/263,893
Filed by Carl Freudenberg KG, Weinheim (DE)
PCT Filed Jan. 18, 2022, PCT No. PCT/EP2022/050965
§ 371(c)(1), (2) Date Aug. 2, 2023,
PCT Pub. No. WO2022/167212, PCT Pub. Date Aug. 11, 2022.
Claims priority of application No. 10 2021 102 444.7 (DE), filed on Feb. 3, 2021.
Prior Publication US 2024/0040716 A1, Feb. 1, 2024
Int. Cl. B01D 39/16 (2006.01); B01D 46/54 (2006.01); B32B 5/02 (2006.01); B32B 5/26 (2006.01); B32B 27/12 (2006.01); B32B 27/32 (2006.01); F16K 24/04 (2006.01); F21S 45/30 (2018.01); H01M 50/30 (2021.01); H05K 5/02 (2006.01)
CPC H05K 5/0213 (2013.01) [B01D 39/1623 (2013.01); B01D 39/1692 (2013.01); B01D 46/543 (2013.01); B32B 5/022 (2013.01); B32B 5/266 (2021.05); B32B 27/12 (2013.01); B32B 27/322 (2013.01); B01D 2239/0216 (2013.01); B01D 2239/0618 (2013.01); B01D 2239/065 (2013.01); B01D 2239/1258 (2013.01); B01D 2279/45 (2013.01); B32B 2250/02 (2013.01); B32B 2307/724 (2013.01); B32B 2457/00 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A pressure equalising device for a housing, comprising:
an inside;
an outside; and
a lattice-like cage having a gas passage opening,
wherein the gas passage opening connects the inside and the outside in a differential pressure-dependent and flow-conducting manner,
wherein the gas passage opening is covered by a gas-permeable membrane which comprises at least one nonwoven layer,
wherein the nonwoven layer comprises fibers which are substantially completely sheathed by a sheath of an elastomer, and
wherein the fibers of the nonwoven layer are each individually and completely sheathed.