Air clutch with centrifugal force cancellation device

摘要

An air clutch has a rotatable drum positioned within a rotatable rim and an air bellows attached to the interior surface of the rim and expandable with the supply of compressed air to urge a plurality of friction blocks into contact with the exterior surface of the drum. The friction blocks are individually supported for radial movement by torque pins on the rim by means of restoring springs. An inertia device is provided for each friction block to apply an inwardly directed radial force to the friction block so as to cancel the effect of the centrifugal force acting on the friction block due to rotation of the rim.