Vehicle seat

US4181354A · kind A · utility

Assignee

• Gebr. Isringhausen · DE

Inventors

• Gerd Grass · Schwieberdingen, DE
• Jorg Hettich · Lemgo, DE

Key dates

• Filing date: Feb 1, 1978
• Grant date: Jan 1, 1980
• Expiry date: Feb 1, 1998

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60N2/544
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A resiliently-mounted vehicle seat has a spring unit on the linkage between the seat frame and the underframe. The unit is interposed between the linkage and the seat frame and includes springs which extend between an extension of the linkage and the seat frame. The springs are connected to a bar which engages the extension at an adjustable position along its length to vary the restoring force of the springs on the linkage according to the weight of the occupant. Movement of the bar along the extension is controlled by virtue of a selective gripping action of the bar on the extension so that in the unloaded condition of the seat the bar does not grip the extension. As an additional feature a mechanism is provided for selecting the desired position of the bar on the extension when the seat is occupied, the bar moving when vibrations in the seat unload the unit.