Patent ID: 6270442
Filing Date: 2001-08-07
Classification: F16H

Abstract:
A low-profile rotary drive apparatus for translating a rotary input to a driven rotary output, the apparatus comprisinga) a first stage having: a drive member for coupling to a rotary source and having a first stage rotary driven member,a transmission member using first stage interacting elements for transmitting angular velocity and rotary motive force of said drive member to angular velocity and rotary motive force of said driven member,two of said members forming a conjugate pair of devices,b) a second stage having: second stage rotary drive member driven by said first stage rotary driven member and second stage rotary driven member driven by said second stage rotary drive member and a transmission member using second stage interacting elements for transmitting rotary drive force of said second stage rotary drive member to rotary force of said second stage rotary driven member,two of said second stage members forming a conjugate pair of devices,c) all of said members mounted coaxially, motion of a first one of said devices being translated to motion of a second one of the devices by said interacting elements,d) said system having a top platform part driven by said second stage rotary driven member and a bottom support part, said top part and bottom part mounted together to permit relative rotation therebetween, ande) various ones of said parts and members defining an internal cavity for receipt of said rotary drive source, said rotary drive source rotating said top part relative to said bottom part via rotation of said first stage rotary drive member.