Piston pump for a hydraulic brake system of a vehicle

US6276909A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Heinz Siegel · Stuttgart, DE
• Dieter Merklein · Ludwigsburg, DE
• Joachim Ehrlich · Kempten, DE
• Andreas Weh · Kempten (Allgäu), DE
• Michael Hellebrandt · Bürgberg, DE
• Tobias Fluck · Immenstadt im Allgäu, DE
• Michael Schlitzkus · Dietmannsried, DE

Key dates

• Filing date: Jun 1, 1999
• Grant date: Aug 21, 2001
• Expiry date: Jun 1, 2019

Classification

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

Abstract

A piston pump for a hydraulic brake system for a vehicle with a slip control system. For economical production, the piston pump includes a piston as a composites part with a core of steel that is surrounded by a lubricant jacket of plastic. By way of example, the lubricant jacket is applied to the core by spray-coating, or is pressed onto the core or slipped onto the core. The lubricant jacket economizes by dispensing with expensive post-machining of the piston surface by grinding, for instance, and improves the sliding properties of the piston.