Automatic adjuster

摘要

An automatic adjuster includes a two part strut interconnected by a non-reversible thread so that extension of the strut under the influence of an adjuster device is effected by relative rotation between the two parts. The adjuster device includes a spigot, rotation of which is controlled by a clutch member as a result of a cooperation between helical teeth respectively on the strut part and spigot and also uni-directionally couples the spigot to a fixed member so that in the event of temporary clutch disengagement due to vibration, rotation of the spigot in the de-adjusting direction is prevented by rotation thereof is the adjusting direction is permitted when required.