Chair assembled from blow-molded parts without tool

Abstract

A chair includes a lower block and an upper block. The lower block is put on the ground. The upper block includes a hollow seat and a hollow backrest. The hollow seat is installed on the lower block. The hollow backrest is installed on the hollow seat. The hollow seat is made via blow molding. The hollow backrest is made via blow molding.

1 . A chair including a lower block put on the ground and an upper block installed on the lower block, the upper block including a hollow seat and a hollow backrest installed on the hollow seat.  
     
     
         2 . The chair according to  claim 1  wherein the hollow seat is made via blow molding.  
     
     
         3 . The chair according to  claim 1  wherein the hollow backrest is made via blow molding.  
     
     
         4 . The chair according to  claim 1  wherein the hollow seat includes an opening defined therein, and the hollow backrest includes a reduced neck inserted in the opening.  
     
     
         5 . The chair according to  claim 4  wherein the opening is defined therein while molding the hollow seat.  
     
     
         6 . The chair according to  claim 5  further including a fastener, wherein the hollow seat includes an aperture defined therein, and the neck includes an aperture defined therein, and the fastener is driven into the apertures.  
     
     
         7 . The chair according to  claim 1  wherein the upper block includes two armrests mounted on the hollow seat.  
     
     
         8 . The chair according to  claim 7  wherein the hollow seat includes two apertures defined therein, and each of the armrests includes an insert extending from a lower end into one of the apertures.  
     
     
         9 . The chair according to  claim 7  wherein the hollow seat includes two cavities defined therein, and each of the armrests includes a lower end put in one of the cavities.  
     
     
         10 . The chair according to  claim 9  wherein the hollow seat includes two apertures defined therein each located within one of the cavities, and each of the armrests includes an insert extending from the lower end into the aperture located within one of the recesses.  
     
     
         11 . The chair according to  claim 1  wherein the lower block includes a base for installment on the ground and a post mounted on the base.  
     
     
         12 . The chair according to  claim 11  wherein the post is telescopic.  
     
     
         13 . The chair according to  claim 12  wherein the lower block includes a control device connected with the telescopic post for control over the extending and shrinking of the telescopic post.