PNEUMATIC GRINDING MACHINE Russian patent published in 1999 - IPC

FIELD: dressing and cleaning operations for preparing part surfaces for coating. SUBSTANCE: machine includes housing in which pneumatic motor in the form of jet oscillator is arranged. Said motor is designed for moving working tool secured to housing by means of tubular member. Cavity of ejector for suction of treatment waste is joined with exhaust ducts of pneumatic motor. Dust trap is arranged in handle connected with housing. Ejector is formed by central insert and tubular member for securing tool. Exhaust ducts of pneumatic motor are oriented tangentially in the same direction as supply nozzle. Damper in outlet of ejector confusor is arranged with possibility of gap adjustment. Handle is secured to housing with possibility of free radial motion by distance exceeding oscillation amplitude of tool. Waste trap is in the form of annular trapezoidal cross section cavity inside handle. EFFECT: enhanced labor conditions of operator due to effective suction of dust out of treatment zone and due to minimum transmission of oscillations to hand of operator at maximum simplification of design and compactness of machine. 4 dwg