CIRCULAR SAW Russian patent published in 1998 - IPC

FIELD: devices for sawing of wood and wood materials, applicable in forest and wood-working industries. SUBSTANCE: saw has a blade and a gear ring with trapezoidal gears, having a tooth point formed by intersection of front and rear faces. Each tooth is symmetrical relative to plane that is perpendicular to blade plane and passes through centers of saw and tooth, it has shape of ah isosceles trapezoid, whose larger base is positioned on periphery of gear ring. Diameters of circles passing through peripheral surface of tooth decrease in direction from tooth points to center. Teeth have unilateral radial broadenings on each side and arranged with alternation of mentioned broadenings relative to both sides of blade, and front and rear faces of teeth have a sharpening at angle to blade plane in direction opposite broadenings. EFFECT: enhanced efficiency. 3 cl, 5 dwg