Planetary gear type electro-magnetic clutch

An electro-magnetic clutch comprising:

• an internal gear that is selectively one of fixed and rotatable in response to an electromagnetic force supplied by an electromagnetic force generating means;
• a first rotational body centrally positioned on an inner side of said rotatable internal gear;
• a second rotatable body;
• a plurality of gears coupled to said second rotatable body configured so that said plurality of gears engage with and revolve around said first rotatable body when said first rotatable body is rotating;
• and
• wherein when an electromagnetic force supplied by an electromagnetic force generating means is applied said internal gear is rotatable and said first rotatable body and said second rotatable body are decoupled such that torque is not transmitted from said first rotatable body to said second rotatable body and when said electro-magnetic force is removed said internal gear is fixed and said first rotatable body and said second rotatable body are coupled and torque is transmitted from said first rotatable body to said second rotatable body.

An electromagnetic clutch comprising:

• an internal gear that is selectively one of fixed and rotatable;
• a first rotatable body having a central gear;
• a second rotatable body;
• and
• a plurality of gears coupled to the second rotatable body, each of the plurality of gears engaging the rotatable internal gear and the central gear of the first rotatable body;
• wherein when the internal gear is fixed, the second rotatable body is rotated, and when the internal gear is free to rotate, the second rotatable body is fixed.