Abstract: In the specification and drawings a reclinable chair is described and shown having a recline mechanism pivotally attaching a backrest to a support assembly. The recline mechanism comprises a coupler operatively connected to an elastomeric spring assembly. The elastomeric spring assembly has four elastomeric inserts positioned between a polygon-shaped core and a polygon-shaped exterior housing. The exterior housing is fixed to the backrest, while the core is fixed to the coupler. The exterior housing has an outwardly protruding tooth positioned between the coupler's inwardly protruding preload stop and the coupler's inwardly protruding recline stop such that the primary tooth engages the preload stop when the chair is in a rested state and engages the recline stop when the chair is in a fully reclined state.

Abstract: An adjustable support arm utilizing a spring having a dynamic attachment point to support the weight of an attached object. The adjustable support arm can comprise a lower bracket connected to an upper bracket by a parallelogram linkage. A spring is utilized to counterbalance the weight of an attached object. The first end of the spring can be attached to the upper link of the parallelogram linkage. The second end of the spring is attached to a drag link to provide a dynamic attachment point that automatically adjusts as the support arm is moved between the upper and lower vertical positions. Either a pivot link or a slot in the lower link can be used to guide the drag link's movement as the support arm's vertical height is adjusted.