Patent ID: 6189972
Filing Date: 2001-02-20
Classification: A47C

Abstract:
A chair back for mounting to an office chair having a seat, the chair back comprising:(a) a rear surface, a front surface spaced from the rear surface and a side extending between the front and rear surfaces;(b) a lumbar support member movably mounted between the front and rear surfaces on a track for vertical movement of said lumbar support member with respect to the chair back and for forward longitudinal movement with respect to the chair back, the lumbar support member has a runner which travels in the track, the track being provided on a frame and having alternating portions which vary in width, a plurality of the portions of the track having a width less than the thickness of the runner to frictionally engage the runner to hold the lumbar support member in position with respect to the chair back and a plurality of the portions of the track having a width greater than the thickness of the runner to permit the runner to travel freely therein;(c) a first control member operatively connected to the lumbar support member for adjusting the forward movement of the lumbar support member; and(d) a second control member operatively connected to the lumbar support member for adjusting the vertical height of the lumbar support member relative to the front surface, the first control member remaining at a fixed position with respect to the rear surface when the vertical height of the lumbar support member is adjusted.