Piston pump in a brake system

US5746111A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Erwin Mueller · Munich, DE
• Norbert Alaze · Markgröningen, DE
• Gerhard Wetzel · Ditzingen, DE
• Klaus Schmidt · Schwieberdingen, DE
• Harald C. Ott · Wenham, US

Key dates

• Filing date: Jan 13, 1997
• Grant date: May 5, 1998
• Expiry date: Jan 13, 2017

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04B1/0439
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

This invention relates to a piston pump in a brake system having a piston, which is drivable in a reciprocating motion in a cylinder by an eccentric tang. To avert damage to a ring seal, a support ring is provided which keeps the ring seal spaced apart from a guide sheath for the piston in the cylinder by a distance that is at least as long as a stroke length of the piston. This prevents running scratches on the piston from coming into contact with the ring seal.