Pressurized fluid device

US4491160A · kind A · utility

Assignee

• Fichtel & Sachs · DE

Inventors

• Ludwig Axthammer · Diez, DE
• Felix Wossner

Key dates

• Filing date: May 21, 1982
• Grant date: Jan 1, 1985
• Expiry date: May 21, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S277/907
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In a pressurized fluid device a cavity is defined within a container. A piston rod passes through a piston rod guide and seal unit of the container. The piston rod guide and seal unit has an axially inner and an axially outer sealing element sealingly engaging the piston rod. The axially inner sealing element acts as a check valve permitting flow of fluid towards the cavity and preventing flow of fluid out of the cavity. An intermediate chamber is defined between the axially inner and the axially outer sealing element around the piston rod. A filling passage is provided across the piston rod guide and sealing unit. This filling passage includes an axially outer filling passage section across the axially outer sealing element between the intermediate chamber and the exterior of the pressurized fluid device.