Piston for a hydraulic cylinder, in particular a clutch master cylinder for motor vehicles

US6584771B2 · kind B2 · utility

Assignee

• FTE automotive GmbH · DE

Inventors

• Christoph Keller · Stuttgart, DE
• Stefan Gebert · Gestungshausen, DE
• Herbert Sauer · Frechen, DE

Key dates

• Filing date: Jun 8, 2001
• Grant date: Jul 1, 2003
• Expiry date: Jun 8, 2021

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D2025/081
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A piston for the variable delimitation of a pressure chamber in a housing of a hydraulic cylinder, in particular a clutch master cylinder for motor vehicles, has a main section on which a running surface is provided for a sealing element on the housing side. The sealing element seals a pressure chamber in an operating position of the piston. The piston also has an after-running device, which, in a normal position of the piston, connects the pressure chamber to an after-running area. The after-running device is made separately from the main section and is connected without play to the main section to form the piston. As a result, a piston that is easy to manufacture is created and which, with reference to the after-running device, has an improved functionality compared with prior art.