Chair padding with air cushion

Abstract

A padding device mounted in each of seat and backrest of a chair is disclosed. The device comprises a support board and a pad assembly secured between the support board and a supporting framework or a vertically stationary upright backrest support attached to the supporting framework, the pad assembly including a pad formed of foam rubber, an airtight cloth enclosed the pad and the support board, and a valve projected from the cloth for communicating air within the pad and external air. Air within the pad is adapted to increase or decrease by adjusting the valve responsive to sitting by a person. In another configuration the seat and the backrest are integrally formed. The temporarily deformed pad assembly can provide the buttocks and the back of a seated person with a degree of comfort by sharing weight of the person by both air within the pad and the pad.

1 . A padding device mounted in each of a seat and a backrest of a chair, comprising: 
 a support board; and    a pad assembly secured between the support board and a supporting framework or a vertically stationary upright backrest support attached to the supporting framework, the pad assembly including a pad consisting essentially of a foam rubber, an airtight first cloth enclosed the pad and tho support board, and a valve projected from the first cloth for communicating air within the pad and external air,    wherein air within the pad is adapted to increase or decrease by adjusting the valve in response to pressing either the seat or the backrest, and the foam rubber is selected such that the pad becomes firmer when inflated and softer when deflated.    
   
   
       2 . The padding device of  claim 1 , further comprising a second cloth enclosed the pad assembly with the valve being projected therefrom.  
   
   
       3 . The padding device of  claim 2 , further comprising a frame member secured between the pad assembly within the second cloth and the supporting framework or the vertically stationary upright backrest support.  
   
   
       4 . A padding device mounted in an integral seat and backrest assembly of a chair, comprising: 
 a support board; and    a pad assembly secured between the support board and a supporting framework, the pad assembly including a pad consisting essentially of a foam rubber, an airtight first cloth enclosed the pad and the support board, and a valve projected from the first cloth for communicating air within the pad and external air,    wherein air within the pad is adapted to increase or decrease by adjusting the valve in response to pressing either the seat or the backrest, and the foam rubber is selected such that the pad becomes firmer when inflated and softer when deflated.    
   
   
       5 . The padding device of  claim 4 , further comprising a second cloth enclosed the pad assembly with the valve being projected therefrom.  
   
   
       6 . The padding device of  claim 5 , further comprising a frame member secured between the pad assembly within the second cloth and the supporting framework.