Vehicle seat, more specially for commercial vehicles

US4397501A · kind A · utility

Assignee

• Messrs. Willibald Grammer · DE

Inventors

• Hermann Meiller · Wernberg-Köblitz, DE
• Otto Kunst · Amberg, DE

Key dates

• Filing date: Dec 15, 1980
• Grant date: Aug 9, 1983
• Expiry date: Dec 15, 2000

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60N2/38
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A commerical vehicle seat with a mechanism for adjusting the seat to the weight of the driver, wherein there is provided a support plate for the backrest of the seat capable generally of upright motion relative to a backrest support. Between the backrest support plate and the support backrest there is at least one spring for biasly a seat support bracket, with one end of the spring being able to be moved in relation to the backrest support plate (or the backrest support) by an adjustment member which adjusts to different weights. More specifically, this end of the spring is connected to a support lever which may be rotated about a generally horizontal axis and is fixed to the backrest support, while the other end of the spring is acted upon by an adjustment lever which may be spring-locked in a number of different positions for keeping the support lever in different positions of adjustment. The adjustment lever is also rotatably fixed to the backrest support.