SAW BLADE Russian patent published in 1997 - IPC

FIELD: mechanical engineering. SUBSTANCE: body 1 of saw blade has teeth 3. Height of cutting teeth 3 is gradually increased from ends of saw blade to its center 4 in direction of body 1. Extreme points of recesses 5 are located over arc of circumference. Located on side surfaces of body 1 are copper liners 6 with layer 7 of porous bronze applied to them. Aforesaid layer is covered with antifriction material. EFFECT: high efficiency. 1 cl, 2 dwg