Rotary actuator with a modified seal structure

US5492051A · kind A · utility

Assignee

• Fichtel & Sachs · DE

Inventors

• Stefan Schiffler · Schonungen, DE
• Robert Pradel · Schweinfurt, DE

Key dates

• Filing date: Oct 28, 1994
• Grant date: Feb 20, 1996
• Expiry date: Oct 28, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60G2202/22
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Rotary actuator, including a cylinder and motor shaft, as well as end caps which define a work chamber, whereby a number of ribs on the inside surface of the cylinder and the same number of vanes on the motor shaft divide the working area into work chambers which are alternately supplied with hydraulic medium, and seal units inside grooves in the ribs and vanes which hydraulically separate the work chambers from one another, characterized by the fact that there is a space between the seals and the side walls of the grooves which is offset by an additional volume.