Chair having forward tilting device

Abstract

A chair includes a base having two rear posts, two pairs of levers having rear ends pivotally secured to the posts and having two lever members located above the other two lever members. A seat has two front legs extended downward and pivotally secured to the front ends of the levers with pivot axles for allowing the seat to move up and down relative to the base. An actuating device is disposed on the base and coupled to the front end of the seat for elevating the seat relative to the base and for rotating the legs of the seat and for tilting the seat relative to the base.

I claim:  
     
         1 . A chair comprising: 
 a base including a rear portion having a pair of posts extended upward therefrom,    two pairs of levers including a rear end pivotally secured to said posts respectively, and each including a front end, and each including a first lever member located and provided above a second lever member,    a seat including a front portion having a pair of legs extended downward therefrom and pivotally secured to said front ends of said pairs of levers with pivot axles for allowing said seat to move up and down relative to said base, said seat including a bracket disposed on said front portion thereof and located forward of said legs, and    an actuating device disposed on said base and coupled to said bracket for elevating said seat relative to said base and for rotating said legs of said seat relative to said first levers and for tilting said seat relative to said base.    
     
     
         2 . The chair according to  claim 1 , wherein said legs each includes a lower end, said seat includes a rear portion and includes a pair of stays secured between said rear portion of said seat and said lower ends of said legs.