Pumping assembly with a grounding connection having sharp edges to bite into an insulating layer of the pump housing

US7927113B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Pascal Chaumet · Molsheim, FR
• Detlef Marth · Gerlingen, DE
• Erich Jahrstorfer · Forstern, DE
• Ingo Immendoerfer · Tamm, DE
• Philip De Haan · Germering, DE
• Bruno Schoener · Groß-Zimmern, DE

Key dates

• Filing date: Sep 20, 2007
• Grant date: Apr 19, 2011
• Expiry date: Sep 20, 2027

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02K11/40
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

Electric fuel pumps are already known with a pump housing and a ground terminal, which is provided on a terminal cover, for making contact with an electrical ground, in which the pump housing and the ground terminal are connected to one another via a ground connection, which has a first contact section for making contact with the pump housing and a second contact section for making contact with the ground terminal. The first contact section is provided on the outer circumference of a terminal cover and, after installation, is pressed with a contact pressure against the inner face of the pump housing. Since the inner face of the pump housing has increasingly been provided with an electrically insulating anticorrosion coating, however, when the terminal cover is pressed into the pump housing, touching contact with the pump housing does take place which is usually also electrically conductive, but as a result of the electrically insulating coating has a high electrical resistance. In the case of the conveying assembly according to the invention, the impedance of the contact-making is reduced. The invention provides that the first contact section is designed to have sharp edges in such…