KNIFE FOR CARVING Russian patent published in 2008 - IPC B26B3/00 

FIELD: carving.

SUBSTANCE: knife comprises narrow curved member set in a holder that is trapezoid in cross-section and has rounded ribs, sides gently diverging toward the free end, handle on the bottom side made of convex arc-like outer face and step inner face, and cutting edge on the narrow part and rounded expanded area at the base with an angle between the arc-shaped face and cutting edge. The member has varying thickness that decreases from the base to the top. The inner face in the zone of cutting edge is arc-shaped with an arc curvature exceeding that of the outer face of the member more than by two times. The cutting edge is provided with double-sided asymmetric grinding. The angle of grinding ranges from 6 to 8 degrees. The ratio of the grinding angle to the thickness of the member near its top ranges from 26 to 16 degree/mm. The ratio of the thickness of the member at its top to the thickness of the member at the end of the cutting edge in front of the rounded expanded area ranges from 0.25 to 0.45. The ratio of the angle to the length of the cutting edge ranges from 0.16-0.09 grad/mm.

EFFECT: enhanced reliability and expanded functional capabilities.

8 dwg