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:
Jun. 25, 2013
Filed:
Jan. 20, 2007
Günther Beez, Schnett/Thüringen, DE;
Holger Conrad, Hessberg/Thüringen, DE;
Günther Beez, Schnett/Thüringen, DE;
Holger Conrad, Hessberg/Thüringen, DE;
MAHLE International GmbH, Stuttgart, DE;
Abstract
The invention relates to closed impellers () for centrifugal pumps used for conveying homogeneous liquids, especially in cooling systems of motor vehicles. The aim of the invention is to develop a novel design of closed impellers () for centrifugal pumps used for conveying homogeneous liquids, especially in coolant pumps, such that closed impellers comprising single-curved blades () as well as closed impellers comprising three-dimensionally curved blades () can be produced at a low cost while the effect of cavitation wear is minimized on the parts/subassemblies that are mounted downstream of the impeller and the hydraulic efficiency as well as the suction behavior of the respective impeller design is significantly improved. The aim is achieved by a closed impeller () for centrifugal pumps which is characterized in that the width of the blade channel continuously increases from the feeding point of the flow into the impeller to the discharge point of the flow from the impeller () from a perspective of the meridian section such that the ratio between the width (b) in the discharge point and the width (b) at the feeding point ranges from 1.01 to 1.2.