Patent ID: 9045859
Filing Date: 2015-06-02
Classification: D21F

Abstract:
1. An adjustment mechanism comprising: a. a lower pultrusion; b. an upper pultrusion; and c. a plurality of cam blocks located between the lower pultrusion and the upper pultrusion, each of the plurality of cam blocks including: d. a pair of guide keys arranged on opposing sides of each of the plurality of cam blocks so that one of the pair of guide keys is located in the groove on the first side and one of the pair of guide keys is located in the groove on the second side, wherein the pair of guide keys are directly connected to the upper pultrusion and extend from the upper pultrusion into the groove on the first side and the groove on the second side respectively so that as the cam blocks move the guide keys move longitudinally within the grooves; wherein the groove on the first side and the groove on the second side include open ends: wherein the plurality of cam blocks are longitudinally movable relative to the lower pultrusion and the upper pultrusion so that as the plurality of cam blocks longitudinally move, at least a portion of the upper pultrusion moves relative to the lower pultrusion.