Abstract: The adjustable configuration seating has a pair of opposed lateral rigid frame members with seat and back panels extending therebetween. In some embodiments, the chair includes flexible panels secured in place between the two frame members by crossmembers extending between the frame members, with a single adjustably positionable tension crossmember also extending between the frame members to hold the seat and back panel taut. Conversion between relatively upright and reclining configurations is accomplished by repositioning the tension crossmember between the frames, and turning the assembly ninety degrees to position the selected seating surface to face generally upwardly. Other embodiments have rigid seating and back panels, with the backrest panel articulating between the frame members to allow the seating configuration to change. The backrest panel may be secured to the seating panels by a rigid or flexible intermediate panel.

Abstract: A quadrail ergonomic apparatus includes two or more pathways designed to permit movement in two or more directions mounted to a static object above a surface. One or more carriages designed to move in two or more directions are disposed within the pathways. Each carriage is suspended above the surface from the pathways and capable of maintaining a workload in place and permitting movement of the workload in at least four directions.

Abstract: The adjustable configuration seating has a pair of opposed lateral rigid frame members with a continuous web or sling type seat and back panel extending therebetween. The seat and back panel is secured in place between the two frame members by a series of crossmembers extending between the frame members, with a single adjustably positionable tension crossmember also extending between the frame members to hold the seat and back panel taut. Conversion between relatively upright and reclining configurations is accomplished by repositioning the tension crossmember between the frames, and turning the assembly ninety degrees to position the selected seating surface to face generally upwardly. The seating surface for the other configuration is a separate side or surface of the seating web or sling. The seat may be folded by hinging the crossmembers together and folding the web or sling between the two frame members as they are drawn together.