DUST HEAD Russian patent published in 1995 - IPC

FIELD: construction material industry. SUBSTANCE: dust head has trapezium-shaped body, whose small end is connected with suction system branch pipe and large end is connected with scraper. Head body is provided with cover mounted on its top and pump unit mounted above cover. Lower edge of cover and scraper define suction slit, lower edges of cover and pump unit define clearance. Space between lower edges of pump unit and cover does not exceed suction slit width. Distance from projection of pump unit lower edge to line, which is an extension of cover, is determined by ratio α, where C is distance between lower edges of pump unit and cover; a is an angle of rest of material to be removed. EFFECT: wider operational capabilities, simplified construction and enhanced reliability in operation. 2 dwg