Pumping unit with reinforcing ribs

US8241023B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Adam Wilhelm · Munich, DE
• Peter Weber · Kreuzlingen, CH
• Johann Rothkopf · Finsing, DE
• Mehmet Gueluem · Markgröningen, DE
• Fevzi Yildirim · Gerlingen, DE
• Thomas Wuensch · Ludwigsburg, DE
• Reinhard Dittmann · Straubing, DE

Key dates

• Filing date: Sep 19, 2007
• Grant date: Aug 14, 2012
• Expiry date: Apr 17, 2029

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05C2225/00
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A pumping unit having a pump chamber with a rotor mounted in a rotatable manner within the chamber. The pumping chamber is formed by a circumferential wall and two end walls. The circumferential wall is formed on an annular collar of a pump part and has on its inner surface a track on which sealing bodies of a rotor roll. To avoid deformation of the pump part by hydraulic forces or by pressing-in forces, ribs are arranged on the outer surface of the circumferential wall which extend away from the pump chamber. A shoulder is arranged on the side of the end wall which is directed away from the pump chamber. The shoulder is connected by a press fit to the pump housing and has thin walls so that pressing forces do not result in any deformation to the end wall of the pump chamber.