Vehicle seat which is adjustable in height and with automatic weight adjustment

US5058852A · kind A · utility

Assignee

• GRAMMER AG · DE

Inventors

• Johann Meier · Schwarzenfeld, DE
• Johann Grassl · Schwandorf, DE
• Josef Dotzler · Amberg, DE

Key dates

• Filing date: Oct 12, 1990
• Grant date: Oct 22, 1991
• Expiry date: Oct 12, 2010

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60N2/525
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A vehicle seat which is adjustable in height and which affords automatic adjustment to the seat occupant weight comprises a gas spring between a seat frame and a base frame, a valve arrangement actuable by an actuating element to adjust the pressure in the gas spring in dependence on the weight of the seat occupant, and a means for setting the desired seat height. Disposed between the seat and base frames is a belt reel device with a coupling means, which like the gas spring, can be subjected to the action of pressure gas from a pressure source. The pressure source comprises a compressor driven by a drive motor, which are disposed on the vehicle seat. The valve arrangement includes a 2/2-way valve which serves only for the release of pressure gas from the gas spring, and a 3/2-way valve between the pressure source and the coupling means of the belt reel device. The valve arrangement may be mechanical/pneumatic in operation or may be controlled by an electronic control arrangement.