Sprung vehicle seat

US4461444A · kind A · utility

Assignee

• Willibald Grammer · DE

Inventors

• Karl J. Grassl · Schwandorf, DE
• Hermann Meiller · Wernberg-Köblitz, DE

Key dates

• Filing date: Nov 12, 1981
• Grant date: Jul 24, 1984
• Expiry date: Nov 12, 2001

Classification

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

Abstract

A sprung vehicle seat which adjusts to a preset height, even when accommodating people of different weights, and which also permits adjustment of the preset height, is supported by a gas spring. An actuator which is linearly movable when there is a change in the seat height can cooperate with a switching mechanism, which includes a valve spaced apart from a switch, to control the volume of air in the gas spring. A holder carrying either the switching mechanism or the actuator is pivotably mounted on a slider which is linearly movable unless it is locked into place. When the holder is in a first angular position, the actuator and the switching mechanism are separated to avoid unnecessary actuation of the gas spring during bouncing movements, and when it is in a second angular position the actuator and the switching mechanism are moved toward each other so that they can cooperate to adjust the seat to the preset height. A manually operable three-stage actuating mechanism is operative during a first actuating stage to pivot the holder into its second position, during a second stage to unlock the slider, and during a third stage to shift the slider from one position to another so as to…