Patent · US Active

Pressure equalising device and housing comprising the pressure equalising device

US12089352B2 · kind B2 · utility

0Cited by

1References

16Claims

0Family size

Assignee

Carl Freudenberg KG · DE

Inventors

Christopher E. Schaefer · Lebanon, US
Ingo Stephan · Görlitz, DE
Markus Filler · Grasellenbach, DE

Key dates

Filing date	Jan 18, 2022
Grant date	Sep 10, 2024
Priority date	—
Expiry date	Jan 18, 2042

Classification

Technology area (CPC H)Electricity
CPC primaryH01M50/394
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A pressure equalising device for a housing, including an inside, an outside, and a lattice-like cage having a gas passage opening. The gas passage opening connects the inside and the outside in a differential pressure-dependent and flow-conducting manner. The gas passage opening is covered by a gas-permeable membrane which includes at least one nonwoven layer. The nonwoven layer includes fibers which are substantially completely sheathed by a sheath of an elastomer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.