| 摘要 |
PCT No. PCT/FR87/00341 Sec. 371 Date May 3, 1988 Sec. 102(e) Date May 3, 1988 PCT Filed Sep. 2, 1987 PCT Pub. No. WO88/02081 PCT Pub. Date Mar. 24, 1988.A tooth according to the invention is such that its flank (foot flank) (1B) situated inside the not entirely circular pitch curve (PA) follows an involute of a circle determined by a pressure angle (p), and has a face (2B) outside the pitch curve such that its current point (M) is determined by the intersection of the flank (1A) of the co-operating tooth with the tangent to the circles defining the flank (1A) passing through the instantaneous point of contact (N) of the pitch curves (P'A, P'B). The pitch curves may be circular arcs, logarithmic spiral arcs, elliptical arcs, or a succession of such arcs around an open or a closed curve in order to form gearing. Some lengths of the pitch curves may have no teeth. |
