Patent ID: 7329202

Claim:
A toothless gear speed reducer, comprising an electric motor having a drive shaft supported by bearings configured on an upper end and on a lower end; at least one planar planetary gear train further comprising an inclined plane conical drive gear attached to, or formed of, the drive shaft of the motor; a plurality of conical deceleration driven gears driven on the exterior inclined surface by the inclined exterior surface of the drive gear, and having an output gear surface speed substantially equal to the input gear surface speed; an inclined plane outer gear case drive ring; and an outer gear case connected to the drive ring; wherein the drive shaft at a center of the electric motor drives and rotates the inclined plane cone drive gear, the inclined plane outer gear case drive ring drives and rotates the outer gear case, and contact forces between conical inclined planes are used to achieve a superior driving force.