Patent ID: 7350863
Filing Date: 2008-04-01
Classification: A47C

Abstract:
1. A work chair having two-stage height adjustability for accommodating lengths of upper and lower legs of a user comprising: a foot; a telescoping column comprising a top column part, a central middle column part and a bottom column part, the bottom column part being positioned on the foot; a seat supported in a height-adjustable manner by the telescoping column, the seat comprising a front part and a rear part, where the front part of the seat is hinged to the rear part of the seat, the rear part of the seat being secured in a substantially horizontal position to the top column part, the front part of the seat being secured to the central middle column part in a hinged manner by a rod having two hinges, one hinge being secured to an underside portion of the front part of the seat and the other hinge being secured to a securing position on the central middle column part; and an adjustable backrest for promoting an upright position of a user's back, the adjustable backrest being moveably arranged to the top column part by a coupling, the coupling comprising a first fixed rod secured to the top column part, a second fixed rod secured to the adjustable backrest, and an upwardly running rod tiltably and slidably coupled to the first fixed rod and tiltably coupled to the second fixed rod so that the second rod is horizontally disposed, whereby a height of the rear part of the seat is adjustable via the telescoping column to accommodate a length of a lower leg of a user and the front part of the seat hingingly pivots to accommodate a length of an upper leg of a user as the height of the rear part of the seat is adjusted.