Active chair

An active chair comprising:

• a chair assembly formed from a seat portion, a backrest portion extending upward from said seat portion, a base supporting said seat portion and said backrest portion, a plurality of legs attached to said base for holding said chair assembly, a height adjustable mechanism including a gas cylinder allowing vertical adjustment of said seat portion relative to said base, said base further defined as a top plate assembly formed from a top plate, a transverse beam, and four angled beams, said transverse beam interlocks with said top plate by use of six locating cut-outs in said top plate and six extrusions on said transverse beam, said top plate assembly mounted onto a linear shaft assembly having a middle plate assembly mounted onto said linear shaft assembly, said middle plate assembly includes a middle plate, four linear bearing housings, a transverse beam, and four angled beams, said transverse beam interlocks with said middle plate by use of six locating cut-outs in said middle plate and six extrusions on said transverse beam, wherein said chair seat assembly is capable of front-to-back or right-to-left linear displacements, or a combination thereof;
• a first brake assembly having a first hand controller and a brake caliper connected via a first bowden cable housing mounted onto said middle plate assembly constructed and arranged to interact with said transverse beam of said top plate assembly providing braking or complete stop for right-to-left linear displacement;
• and
• a second brake assembly having a second hand controller and a brake caliper connected via a second bowden cable housing mounted onto said bottom plate assembly constructed and arranged to interact with said transverse beam of said middle plate assembly providing braking or complete stop for front-to-back linear displacement.