Chair with adjustable back Patent #: 4007962
ApplicationNo. 06/068850 filed on 08/22/1979
US Classes:297/291, Spring centers back on pivot248/609, Elastomeric248/634Nonmetallic resilient element
ExaminersPrimary: Zugel, Francis K.
Attorney, Agent or Firm
International ClassesA47C 7/46 (20060101)
A47C 3/12 (20060101)
A47C 3/00 (20060101)
Foreign Application Priority Data1978-09-08 CH
AbstractIn order to achieve the necessary flexible curve according to the natural curve of the human spine in the field of back supports, the back support, attached relatively rigidly in its lower section to the seat, is constructed increasingly more flexibly towards the top. So that the desired course of the spine-like curve can also be achieved at the upper end of the shoulder pad connected to the back rest when the chair is "loaded", a spring member which becomes progressively "harder" is mounted in the connecting element between the end of the back rest and the shoulder pad.