Patent ID: 9668582
Date: 2017-06-06
CPC Classifications: A47C

Claim:
1. A linear adjustment mechanism for a chair including a seat and a back comprising: first and second structural members adapted to be connected to the seat and the back respectively and coupled to one another for relative sliding movement along an axis; a rack on the first structural member extending in a direction of the axis; a pin member positioned in an opening of the second structural member for engaging with the rack, the pin member comprising one or more bore openings; one or more spring members carried by the second structural member for biasing the pin member during movement between respective limits of travel of the first and second structural members with respect to one another along the axis; wherein the one or more spring members are disposed through the one or more bore openings for coupling the one or more spring members relative to the pin member; wherein the first structural member is a bar that is adapted to extend upwardly from the seat, and wherein the second structural member is a sleeve carried by the bar and is adapted to be coupled to the back of the chair; and wherein the bar is formed with a recess defining the rack, and wherein the pin member and the one or more spring members are disposed in the recess and carried by the sleeve, and wherein the rack extends along a side edge in engagement with the pin member.