Patent ID: 7032874

Claim:
A suspension system for a seat on a vehicle, the suspension system comprising: a first frame member; a second frame member connectable to the seat and coupled to the first frame member, the second frame member being movable relative to the first frame member; a suspension member coupled to both the first frame member and the second frame member, the suspension member suspending the second frame member above the first frame member; an adjustment mechanism coupled to the suspension member and manually manipulatable by an operator to adjust the stiffness of the suspension; a handle to facilitate manual manipulation of the adjustment mechanism, the handle being movable along a portion of the adjustment mechanism between a first position and a second position; and an engaging member resiliently resisting movement of the handle between the first position and the second position; wherein the adjustment mechanism is a threaded rod; and wherein the engaging member engages threads of the threaded rod to resiliently resist movement of the handle between the first and second positions, such that, the handle does not move between the first and second positions unless sufficient external forces are exerted on the handle, the sufficient external forces being in excess of the weight of the handle.