betaetigungseinrichtung for the power steering of a steering gear of motor vehicles

摘要

A power steering device according to this disclosure has first and second pairs of chain sprockets that are drivingly interconnected by a pair of roller chains. One pair of the sprockets is connected to a steering wheel by a steering shaft. The other pair of sprockets is drivingly connected to the pinion of a rack and pinion steering gear. A resiliently mounted chain tensioning device engages the portions of the chains that span the space between the two pairs of sprockets. The chain tensioner is displaced laterally when torque is transmitted through the chains from one set of sprockets to the other. A power steering valve senses the lateral displacement of the chain tensioner and functions to direct pressure fluid to one side or the other of a power steering booster cylinder in response to the movement of the tensioner.