Patent ID: 6669292
Filing Date: 2003-12-30
Classification: A47C

Abstract:
A chair comprising:support frame means having a forward first support portion and a rear second support portion, said support frame means including a pair of spaced elongated rigid support members connected to opposite sides of a central base module and defining said forward and rear support portions; a seat member pivotably connected at its forward end to said first forward support portion of said frame means and having a rear support portion; a backrest member having first and second pivot locations, said first pivot location of said backrest member being pivotably connected to said rear second support portion of said frame means, said backrest member comprising a skeletal frame having a pair of spaced uprights, and a lower transverse member having opposite ends and the rear ends of each of said second support portion being pivotally connected to said transverse frame member; and a link member pivotably connected to said rear support portion of said seat member and pivotably connected to said second pivot location of said backrest member; wherein tilting movement of said backrest member rearwardly relative to said frame means causes elevation of said rear portion of said seat member upon weight shifting of the chair user and wherein said seat member and said backrest member have a relative center of rotation approximately coincident with the center of rotation of the hip joint of the user.