Patent Number: 8,573,697

Title: Combination of a waistrest and a backrest

Abstract: A combination includes front and rear frames each having a central hollow portion. The central hollow portion of the front frame includes two lateral sides each having a flexible plate with a plurality of vertically spaced positioning grooves. A guiding groove is defined in each of two lateral sides of the central hollow portion of the rear frame. A waistrest includes a support portion. A lug is formed on each of two sides of the support portion. A protrusion is formed on a rear face of each lug and is received in one of the guiding grooves of the rear frame. A positioning member is formed on the front face of each lug. Each flexible plate abuts the front face of one of the lugs. The positioning member of each lug of the waistrest is engaged in one of the positioning grooves of one of the flexible plates.

Inventors: Su; Tung-Hua (Tainan, TW)


International Classification: A47C 3/00 (20060101)

Expiration Date: 1/05/12017