ROCK CRUSHING TOOL Russian patent published in 1996 - IPC

FIELD: working members of mining machinery. SUBSTANCE: rock crushing tool has shank, wedge-shaped working part, and ultrasonic generator with emitter. Working part is formed by front surface, side surfaces and rear surface together with shaped slot made in it and consisting of converging tube, two diffusers and rectangular sections. Walls of both diffuser and converging tube sections are made inclined in relation to horizontal plane with variable incline angle. Depth of slot is increased at its rectangular section and narrowed sections of converging tube and diffusers in comparison with depth of slot in widened sections of converging tube and diffusers. Ratio of cross-sectional areas of longitudinal slot on rectangular section and cross-sectional area of slot on other sections is 1:0.8-1.2. EFFECT: high efficiency. 2 cl, 3 dwg