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:
Feb. 01, 2011
Filed:
Nov. 05, 2008
Danilo Silva, Gerlingen, DE;
Erich Jahrstofer, Forstern, DE;
Eric Plantier, Vaihingen/Enz, DE;
Jens Gringer, Munich, DE;
Peter Weber, Herrsching, DE;
Celso Eduardo Fávero, Sao Paulo, BR;
Philip DE Haan, Germering, DE;
Reinhard Dittmann, Feldkirchen, DE;
Danilo Silva, Gerlingen, DE;
Erich Jahrstofer, Forstern, DE;
Eric Plantier, Vaihingen/Enz, DE;
Jens Gringer, Munich, DE;
Peter Weber, Herrsching, DE;
Celso Eduardo Fávero, Sao Paulo, BR;
Philip De Haan, Germering, DE;
Reinhard Dittmann, Feldkirchen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
Known pumping devices have a connection lid, a connection cap slipped over the connection lid, a hollow chamber formed between the connection lid and the connection cap, and electrical connections that extend through the connection cap into the hollow chamber. It is disadvantageous that when fuels containing water are being pumped, such as ethanol, corrosion can occur at the electrical connections and at the uninsulated cable segments that are exposed to fuel near the electrical connections, for instance at the electrical coils or flexible cables of the carbon brushes, and in the final analysis this leads to an interruption in the electrical contact and thus to failure of the pumping device. In the electrical device of the invention, corrosion of the electrical connections and of the electrical components adjoining them upstream and downstream is avoided entirely or at least greatly diminished. According to the invention, the electrical connections are each provided in separate chambers of the hollow chamber.