Patent ID: 6276757
Filing Date: 2001-08-21
Classification: A47C

Abstract:
A chair back support arrangement, comprising:an upright supported by a chair base;a back support adapted to slidably engage the upright;interlocking means to maintain a selected support height for the back support with respect to the upright, wherein the interlocking means includes a rack forming part of the upright;an engaging member supported by the back support and arranged to assume either of two positions, one of which is to interlock with the rack, and the other of which is to be clear of the rack;means to change the position of the engaging member from one of said positions to the other, wherein said changing means is able to effect such change by relative positioning of the back support with respect to the upright;a catch pivotally supported by the back support, the position of which catch can be caused to change by relative positioning of the back support with respect to the upright so that in an interlocking position, it interlocks the engaging member in a non-engaging position clear of the rack, and in a release position, it will release such engaging member to effect an interengaging action with the rack, andwherein the catch is arranged so that when the back support is moved to an end position, there is an inter engagement between the catch and the upright, thereby moving the catch from its interlocking position to its release position to allow the engaging member to be released therefrom to resume an interengaging or interlocking position with respect to the rack.