| 摘要 |
FIELD: dentistry equipment, in particular, cleaning of air during gum curing and prosthesis handling. ^ SUBSTANCE: apparatus has casing and fan mounted inside casing and connected to electric engine. Apparatus is equipped with air duct connected to casing, and chamber including dust catcher and connected through pipe to casing. Air duct has tip with extension adapted for regulating of distance between patient's face and end of tip, whose outlet end is closed with cover. Engine is fitted with start regulating device for changing rotational speed of shaft and vane wheel. Valves are mounted on air duct and pipe. ^ EFFECT: provision for baffling of patient's expiration flow away from doctor's face and cleaning of air in the vicinity of source of tooth powder, metal and ceramic powder. ^ 1 dwg |
