Pressure reducer for hydraulic brake systems

US4377176A · kind A · utility

Assignee

• ITT Industries · US

Inventors

• Bernd Schopper · Frankfurt, DE
• Peter Tandler · Rockenhausen, DE
• Derek Lowe · Königstein, DE

Key dates

• Filing date: Mar 2, 1981
• Grant date: Mar 22, 1983
• Expiry date: Mar 2, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7793
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A pressure reducer for hydraulic brake systems comprises a stepped piston carrying a sealing ring in a circumferential groove thereof. The sealing section of the sealing ring begins at the groove wall adjacent the outlet chamber and joins a transitional section of smaller diameter adjacent the inlet chamber. The sealing ring fills the groove essentially completely at least in the sealing section. Preferably the sealing ring abuts the bottom of the groove over its entire axial length. This results in a defined position for the sealing section without excessive friction and wear occurring during operation.