Patent ID: 6408993
Filing Date: 2002-06-25
Classification: F16D

Abstract:
A brake lever for attachment to a splined S-cam shaft of an automotive drum brake and connection to a brake cylinder push rod, including a worm wheel, rotatably mounted in a housing of the brake lever and having internal splines for cooperation with S-cam shaft, and a worm screw, rotatable in the housing perpendicularly to the worm wheel and meshing therewith, and a control arrangement for transmitting a control movement from a reference point to a clutch wheel, which is rotatable on the worm screw, depending on the angular movement of the brake lever, and which forms a clutch with the worm screw normally held engaged by a strong compression spring, the control arrangement including a control disc, which is rotatable coaxially with the worm wheel and is connected to a control ring having a control arm for establishing the point reference by being attached to a fixed part of a vehicle chassis, a pinion meshing with the toothed periphery of the control disc and an adjustment screw, which is coaxial with the pinion and is in toothed engagement with the clutch wheel, wherein the axis of the worm screw is perpendicular to the axis of the pinion and the adjuster screw, characterized in that a cylindrical driver is axially but non-rotatably movable in relation to the pinion coaxial therewith and forms a one-way clutch with a unit including the adjustment screw, which is axially movable a distance corresponding to a control distance for the brake lever, the one-way clutch being spring-biassed into engagement.