Subclass 1/033: Chairs adapted for special purposes (features relating to vertical adjustability A47C 3/2; convertible chairs A47C 13/00; chairs or personal conveyances specially adapted for patients or disabled persons A61G 3/00, A61G 5/00; operating chairs, dental chairs A61G 15/00) Reclining or easy chairs (supports for parts of body A47C 7/36, A47C 7/5, A47C 7/54) having coupled adjustable supporting parts the parts being movably-coupled seat and back-rest (A47C 1/035 takes precedence) the coupling member being a flexible strip