Seat assembly

Abstract

A seat assembly featuring a seat support assembly having a seat mount assembly and a pedestal post assembly which pivotally supports the seat mount assembly and includes a first component and a second component with the second component being adjustable in height with respect to the first component. The seat support assembly includes a rotation locking assembly with a releasable rotation lock which locks the seat mount assembly from rotating with respect to the pedestal post assembly. Also included is a rotation prevention device or arrangement that is supported by the pedestal post assembly and acts to prevent relative rotation between the first and second components while not interfering with height adjustability between the first and second components. In a preferred embodiment, the first and second components are part of a fluid spring system which has an air spring that varies in height by way of a fluid cushion. Preferably, the air spring system includes an inner cylinder with a plurality of externally positioned, elongated projections spaced about the inner cylinder so as to define a plurality of grooves between the projections, and the rotation prevention device further includes a bushing with corresponding grooves and projections that is fixed to an outer cylinder component of the air spring system. The invention also features a method for forming a pedestal post assembly which includes press fitting an extruded sleeve with a circumferential series of projection/recess combinations about the main body of an inner cylinder.