Patent · US Active

Pump and fuel cell system having a pump

US8927175B2 · kind B2 · utility

0Cited by

2References

15Claims

0Family size

Assignee

Daimler AG · DE

Inventors

Oliver Harr · Reichenbach, DE
Andreas Knoop · Eßlingen, DE
Cosimo Mazzotta · Ulm, DE
Patrick L. Padgett · Detroit, US
Hans-Joerg Schabel · Reutlingen, DE
Klaus Scherrbacher · Deggingen, DE

Key dates

Filing date	Jul 23, 2008
Grant date	Jan 6, 2015
Priority date	—
Expiry date	Jan 24, 2032

Classification

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

Abstract

A pump has a shaft, an impeller arranged on the shaft, and a labyrinth seal which is arranged between stationary and moving parts of the pump. A plurality of blades are arranged on the rotor and a labyrinth seal extends at least between the shaft and a rear portion of the blades. A gap in the labyrinth seal is designed such that liquid water can be actively carried away, with the labyrinth seal for this purpose being designed at least in places with a channel in the form of a spiral and/or a staircase. The invention also relates to a fuel cell system having such a pump.

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