Adjustable seat supporting assembly

摘要: An adjustable seat supporting assembly including a pair of spaced support members and base means. The are supported on the means by elongated levers. Each lever is pivotally connected to independently members. There two sets levers each side assembly. have ends facing one another with notches therein. Control links latching plates secured for selectively allowing pivot adjust vertical position improvement comprises use torsion bar associated at rear twisted react between urge in manner raise portion