Patent ID: 8480521
Filing Date: 2013-07-09
Classification: F16G,F16H

Abstract:
1. A flat belt for use in a clutch mechanism that transmits mechanical power to a rotating member by bringing the belt into contact with an outer peripheral frictional surface of the rotating member by applying belt tension to the belt, and that interrupts the power transmission by forcing the belt away from the frictional surface by means of a magnetic force of a magnet by slackening the belt tension, the belt comprising: a lower rubber layer having 0-50 parts by weight magnetic material for 100 parts by weight rubber matrix laid on an inner peripheral side for contact with the rotating member; and an upper rubber layer laid on an outer peripheral side opposite to the lower rubber layer; the upper rubber layer being formed of rubber in which magnetic material is mixed at 150-300 parts by weight magnetic material for 100 parts by weight of rubber matrix.