FIELD: engines and pumps.
SUBSTANCE: device includes air duct (10) enveloping the impeller installed to move inlet air around its axis; at that, inner surface (11) of air duct is arranged so that inlet air moved with impeller can be directed; and air branch pipe (20) for cleaning of inlet air, which is arranged on inner surface (11) of air duct (10) radially near impeller; at that, air branch pipe (20) serves as overflow channel for movement of cleaned inlet air from impeller to the motor of the tool; at that, air branch pipe (20) and air duct (10) are made in block.
EFFECT: owing to air branch pipe and air duct in the form of one part the reliable cleaning of air is reached, and at the same time, manufacturing and assembly process will be economic and reliable.
19 cl, 5 dwg
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