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:
Sep. 26, 2006
Filed:
Feb. 02, 2005
Hans-joerg Fees, Bietigheim-Bissingen, DE;
Reinhard Dittmann, Feldkirchen, DE;
Christoph Mittermueller, Munich, DE;
Hans-Joerg Fees, Bietigheim-Bissingen, DE;
Reinhard Dittmann, Feldkirchen, DE;
Christoph Mittermueller, Munich, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
In known delivery systems, a pump chamber and a revolving impeller in the pump chamber rotating about a pump axis, in which protuberances are provided inside the pump chamber on predetermined end walls, it is disadvantageous that the protuberances very and are complicated to make. In the delivery system of the invention, the friction in the pump chamber is reduced and the efficiency is improved by providing spacers, which space the impeller apart from the end walls of the pump chamber. That the protuberances are disposed in at least one ring around the pump axis.