The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 2003
Filed:
Jun. 19, 2000
Egon Bräuning, Weil am Rhein, DE;
Vitra Patente AG, Muttenz, CH;
Abstract
The adjustment mechanism contains a pneumatic spring that is placed vertically in the underframe, for adjusting height, and a pneumatic spring that is linked to the seat support at one end and the back-rest at the other, for synchronized adjustment of the angle. The pivotable back-rest and the fixed seat support are coupled with each other on the main rotational axis in two hinge connections. The main rotational axis runs above and crosswise over the seat plate. The seat plate has guide cranks on its underside, the supporting arms of the seat support engaging is said guide cranks in such a way that they can slide crosswise to the main rotational axis. The front bearing pegs of the supporting arms engage in the guide cranks. The seat plate is coupled together with the inclination spring on the moving rotational axis on the back-rest. The invention also relates to a back cover with a variably positionable lumbar reinforcement insert and height-adjustable armrests. The inventive adjustment mechanism offers efficient and comfortable synchronization between the sequences of movement of the back-rest and the seat plate.