The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 06, 2015
Filed:
Jul. 23, 2008
Oliver Harr, Reichenbach, DE;
Andreas Knoop, Esslingen, DE;
Cosimo S. Mazzotta, Ulm, DE;
Patrick L. Padgett, Wilmington, NC (US);
Hans-joerg Schabel, Reutlingen, DE;
Klaus Scherrbacher, Deggingen, DE;
Oliver Harr, Reichenbach, DE;
Andreas Knoop, Esslingen, DE;
Cosimo S. Mazzotta, Ulm, DE;
Patrick L. Padgett, Wilmington, NC (US);
Hans-Joerg Schabel, Reutlingen, DE;
Klaus Scherrbacher, Deggingen, DE;
Daimler AG, Stuttgart, DE;
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.