Vehicle seat, more specially for commercial vehicles

Details Vehicle seat, more specially for commercial vehicles Vehicle seat, more specially for commercial vehicles

1980-12-15

1983-08-09

McCall, James T.

Chairs and seats

Back movement resiliently opposed in operating position

Back adjusts independent of seat

297307, 297338, A47C 300

Patent

active

043975011

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.

REFERENCES:
patent: 1447511 (1923-03-01), Davis
patent: 1458688 (1923-06-01), Duxbury
patent: 1767757 (1930-06-01), Harris
patent: 2891784 (1959-06-01), Taylor
patent: 3156499 (1964-11-01), Freedman
patent: 3550953 (1970-12-01), Neale
patent: 3632167 (1972-06-01), Sinfield
patent: 3774963 (1973-11-01), Lowe
patent: 4211426 (1980-07-01), Motloch

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