Clutch mechanism for power transmission system

Claim 1

A clutch mechanism for a power transmission system having one drive member and two driven members, comprising: at least one pair of roller clutch members interposed between said drive member and said two driven members so as to transmit the rotational power of said drive member to said driven members independently of each other when said drive member rotates; said pair of roller clutch members operatively cooperating with said drive member and said driven members such that one of said driven members, which is rotating at a higher speed than said drive member due to external force, is set free from said drive member while said power from said drive member is transmitted to the other driven member; said drive member being rotatably fitted on outer circumferential portions of said two driven members; said drive member including an inner circumferential portion provided with recessed cam surface means for loosely receiving said rollers and for locking said rollers at a front position and a rear position in the rotational direction of said drive member to thereby connect said drive member and said two driven members; said roller clutch members being loosely held by retaining means so as to be movable in the rotational direction of said drive member; said drive member having an inner circumferential portion formed with a recessed portion; at least one cam member having said recessed cam surface means provided thereon being disposed in said recessed portion; and elastic members disposed in said recessed portion at the front and rear of said cam member in the rotational direction of said drive member.