Patent ID: 8613484

Claim:
A chair comprising: a base having a cylinder connected thereto which is connected with multiple legs, each leg having a caster connected thereto, a support frame connected to the base and connected with a frame unit which has two backrest frames and two armrest frames, each of the armrest frames having a first end fixed to a mediate portion of the backrest frame, and a second end of each of the armrest frames having a threaded hole; a seat board connected to a top of the base, and a backrest and two armrests detachably connected to the frame unit, each of the armrests having a circular tube at a lower end thereof and the circular tube being connected to the armrest frame, each of the circular tubes having holes, bolts extending through the holes and being connected to the threaded holes in the armrest frame to detachably connect the armrests to the armrest frames respectively, the backrest frame having connection tubes and the backrest having connectors on a rear side thereof, the connection tubes being detachably connected to the connectors, the backrest and the two armrests being made of Nylon.