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. 29, 1984
Filed:
Mar. 17, 1981
Klaus Franck, Hanover, DE;
Werner Sauer, Wennigsen, DE;
Abstract
A reclining article of furniture for sitting, especially an office chair, with the article including a seat portion and a back portion articulated thereto. The seat portion and back portion are respectively connected to an underframe. The seat portion is supported in a forward zone and the back portion is supported by a supporting lever articulated to the underframe and articulated to the back portion at hip level of a user. To obtain a support which is also effective in the zone of the lumbodorsal vertebrae and to provide a close contact of the supporting surfaces with the users body. The contact is uniform in the rest position approximately from a back of the knees up to the shoulder blades. The seat and back merge through an arcuate intermediate section which is flexible so that the arc becomes wider. A connecting line extending between two points of articulation of the supporting lever in a basic position of the chair is inclined at an angle of between 0.degree. and 25.degree. and, preferably, between 15.degree. and 25.degree., with respect to the vertical. By virtue of these features, the seat surface is initially lengthened toward a rear before a stronger rearward inclination of the back occurs when the seat is moved from an upright sitting attitude to a reclined attitude.