Abstract: A sit to stand workstation may include a right platform attached, such as hingeably attached, to a left platform; a pair of left upper legs pivotally attached to a bottom surface of the left platform; a pair of right upper legs pivotally attached to a bottom surface of the right platform; a leg axle operatively connected to an end of each of the left upper legs distal from the left platform and to an end of each of the right upper legs distal from the right platform; a pair of lower right legs operatively connected to the leg axle; a pair of lower left legs operatively connected to the leg axle; removable tray attachments removably engaged with a surface of the right platform or the left platform; and storage compartments removably attached to the workstation when the right platform and the left platform are in a folded configuration.

Abstract: A height adjustable keyboard support for attachment to and support from a work surface comprising two mounting brackets for attachment to a work surface. A rigid subassembly has a pair of horizontally spaced pivotting support arms rigidly connected at one end thereof by an intermediate member such that said support arms maintain the relationship therebetween. The subassembly is pivotally secured to the work surface by mounting brackets. A tiltable keyboard mounting arrangement is located generally between the support arms and is controlled by a linkage. An adjustable in length link extends between the subassembly and one of the mounting brackets and maintains the subassembly in a desired position and allows adjustment of said position by adjusting the length of the adjustable link. The link can have one end thereof secured in a slot with gravity biasing the link to one end of the slot. The slot allows the keyboard support to move upwardly if required to avoid pinning of an operator's legs therebeneath.

Abstract: A height adjustable workstation uses a torsion spring in association with a transmission for providing a counterbalance force opposing downward forces applied to the work surface. The workstation has telescoping legs and the telescopic movement thereof is transmitted through the transmission system to the torsion spring. The torsion spring is loaded and applies the counterbalance force to the legs via the transmission. The system includes a hand engaging adjustment mechanism for varying the magnitude of the counterbalance force and also includes a lock arrangement for locking the workstation at various selected positions. The preferred transmission system includes a rack and pinion gear arrangement connected to the torsion spring by a shaft.