Electrical device and plug for an electrical device

US7878851B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Danilo Moura Silva · Gerlingen, DE
• Erich Jahrstofer · Forstern, DE
• Eric Plantier · Lambach, DE
• Jens Gringer · Munich, DE
• Peter Weber · Kreuzlingen, CH
• Celso Eduardo Favero · Valinhos, BR
• Philip Derek Eduard De Haan · Zwaag, NL
• Reinhard Dittmann · Straubing, DE

Key dates

• Filing date: Nov 5, 2008
• Grant date: Feb 1, 2011
• Expiry date: Apr 9, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S439/934
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

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.