Patent · US Active

Device for recirculating an at least partially gaseous composition containing hydrogen and fuel cell system

US11959478B2 · kind B2 · utility

0Cited by

1References

20Claims

0Family size

Assignee

BUSCH PRODUKTIONS GMBH · DE

Inventors

Théo Bilger · Helfrantzkirch, FR
Boris Kossek · Rheinfelden (Baden), DE
Matthias Benz · Lörrach, DE
Yohann Perrot · La Derrière, FR

Key dates

Filing date	Feb 17, 2020
Grant date	Apr 16, 2024
Priority date	—
Expiry date	Mar 15, 2040

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/50
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A dry rotary pump for recirculating an at least partially gaseous composition containing hydrogen. The dry rotary pump comprising a first rotating shaft and a second rotating shaft. The first rotating shaft and the second rotating shaft are driven in rotation by a drive system in a gear chamber. The dry rotary pump comprises a first pair of seals and a second pair of seals, each comprising a first shaft seal and a second shaft seal. The dry rotary pump comprises a pressure equalization chamber in fluid connection with a gap between the first shaft seal and the second shaft seal to regulate pressure in the gap. The gear chamber is in fluid connection with the gap, and the pumping chamber is in fluid connection with the first shaft seal and the first shaft seal by a pulsation attenuation chamber.

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