Patent ID: 6090003
Filing Date: 2000-07-18
Classification: F16H

Abstract:
A sprocket comprising:a first plurality of sprocket teeth;a second plurality of sprocket teeth;a first one of said first plurality of sprocket teeth cooperating with a second one of said first sprocket teeth or with a first one of said second sprocket teeth to define a first tooth space including a first engaging flank, a first flat surface tangent to and extending radially inward of said first engaging flank, a first root surface portion tangent to and extending radially inward of said first flat surface, and a second flat surface tangent to and extending radially inward of said first root surface portion, said first flat surface having a first portion and a second portion, and said second flat surface having a third portion, whereby said first portion facilitates staging a first meshing between an associated roller and the sprocket, and said second portion and said third portion facilitate an associated roller seating in two-point contact within said first tooth space; anda second one of said second plurality of sprocket teeth cooperating with a third one of said first sprocket teeth or with a third one of said second sprocket teeth to define a second tooth space including a second engaging flank, a third flat surface tangent to and extending radially inward of said second engaging flank, a second root surface portion tangent to and extending radially inward of said third flat surface, and a fourth flat surface tangent to and extending radially inward of said second root surface, said third flat surface and said fourth flat surface facilitating an associated roller seating in two-point contact within said second tooth space.