Patent ID: 6502679
Filing Date: 2003-01-07
Classification: F16D

Abstract:
A low-noise low-friction resistance one-way drive gear wheel assembly comprising:a gear wheel, said gear wheel comprising an inner diameter, and a plurality of elongated recesses equiangularly spaced around said inner diameter and extended in radial direction, said elongated recesses each having a relatively wider front end, a relatively narrower rear end, and a neck on the middle between said relatively wider front end and said relatively narrower rear end; a hub inserted through the inner diameter of said gear wheel; a plurality of first rolling balls respectively moved in said elongated recesses of said gear wheel between the relatively narrower rear end and neck of each of said elongated recesses of said gear wheel and disposed in contact with the periphery of said hub, said rolling balls having a diameter greater than the width of the neck of each of said elongated recesses of said gear wheel; a plurality of ball racks respectively mounted in the relatively wider front end of each of said elongated recesses of said gear wheel and spaced from the periphery of said hub; a plurality of second rolling balls respectively mounted in said ball racks and peripherally disposed in contact with the periphery of said hub; and a plurality of spring members respectively mounted in the relatively wider front end of each of said elongated recesses of said gear wheel and adapted to support said ball racks and to force said ball racks and said second rolling balls toward the neck of each of said elongated recesses of said gear wheel; wherein when said gear wheel is rotated clockwise, said first rolling balls are moved to the relatively narrower rear end of each of said elongated recesses of said gear wheel forced into engagement between said gear wheel and said hub, thereby causing said hub to be rotated clockwise with said gear wheel; when said gear wheel is stopped, said first rolling balls are forced out of the engagement position between said gear wheel and said hub, enabling said hub to be rotated clockwise relative to said gear wheel.