Patent ID: 6089664
Filing Date: 2000-07-18
Classification: A47C

Abstract:
A back and waist support device for a chair having a seating surface and a backrest, comprising a longitudinally extending first projection for supporting the back of a user and a longitudinally extending second projection for supporting the waist of the user, characterized in that:a first arm is arranged for supporting said first projection wherein the first arm extends laterally from a generally center position of the backrest;a second arm is arranged for supporting said second projection wherein the second arm extends laterally from a generally center position of the backrest;springs are arranged on said first arm and second arm so as to urge said first projection and second projection in a direction in which said first and second projections forcedly press the back and waist, respectively;said first and second arms each are arranged in a manner to be pivotally moved about a separate shaft within a predetermined range, each shaft adapted for attachment to the backrest;a first base plate interconnected between the first arm and the backrest;a second base plate interconnected between the second arm and the backrest; andan angle adjusting mechanism disposed between the first base plate and the second base plate to permit the base plates to be pivotally moved and held at any desired angle.