Releasable locking device for a vehicle steering column adjustable in the longitudinal direction

US5113716A · kind A · utility

Assignee

• Mercedes-Benz Group AG · DE

Inventors

• Rainer Dumschat · Donzdorf, DE
• Gottfried Schremmer · Tamm, DE

Key dates

• Filing date: Oct 18, 1990
• Grant date: May 19, 1992
• Expiry date: Oct 18, 2010

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B62D1/192
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A releasable locking device for a vehicle steering column adjustable in the longitudinal direction is disclosed which has a postionally fixed steering column part and a steering column section displaceable relative to the latter. A steering wheel is provided at the end of the steering column. The fixing of the steering column can be influenced by a hydraulic system which can be controlled by a mechanical actuating member. A locking device is provided which has a sealed hydraulic piston-cylinder unit which is arranged axially parallel to the steering column and is coupled between the positionally fixed steering column part and the displaceable steering column section with the cylinder chamber subjected to pressure in the case of an impact on the steering wheel being completely filled. The relative position of the fixed steering column part and the displaceable steering column section can be locked in various supporting positions by a blocking device arranged in an overflow path between the two sealed cylinder chambers.