Piston pump

US6302663A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Wolfgang Schuller · Cleebronn, DE
• Franz Mayer · Birkenfeld, DE
• Christiane Schiller · Tamm, DE

Key dates

• Filing date: Dec 28, 1999
• Grant date: Oct 16, 2001
• Expiry date: Dec 28, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04B53/14
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a piston pump for a slip-controlled, hydraulic vehicle brake system. In order to be able to simply and inexpensively produce the piston pump as a stepped piston pump, the invention embodies a piston as a tubular deep drawn part made of sheet metal, with an outwardly protruding circumferential bead. The bead is produced by axially compressing the piston. The bead constitutes an axial support for a guide ring and sealing ring placed onto the piston. A disk-shaped, abrasion resistant striking piece is press-fitted into an open end of the tubular piston, and is used by the piston for resting against a circumference of a cam element used for the stroke drive.