ABRASIVE-JET TREATMENT DEVICE WITH PROPORTIONER REMOTE CONTROL Russian patent published in 2009 - IPC B24C7/00 

FIELD: instrument making.

SUBSTANCE: invention relates to the device designed to make abrasive-jet processing of various surfaces for them to be cleaned of dirt. The proposed device comprises a compressed air source, a nozzle assembly accommodating a control shut-off device, a pneumatic drive with pneumatic cylinder communicating via control channel with the control shut-off device, a mixer, a proportioner communicating with the pneumatic cylinder and a vessel for abrasive material communicating via the proportioner with the mixer. The said pneumatic drive comprises a pneumatic control valve connected, via the compressed air feed line, to the compressed air source. The said pneumatic control valve incorporates a slide valve, a backfeed channel, a pneumatic control space arranged on one side of the said slide valve and a space with an adjustable spring arranged on the other side of the slide valve. The pneumatic control space communicates, via the backfeed channel, with the pneumatic control valve inlet and, via the control channel, with the control shut-off device. The said pneumatic control valve allows the pneumatic cylinder spaces to communicate with the valve inlet and atmosphere the control shut-off device can communicate the control channel with atmosphere.

EFFECT: simplified-control device.

8 cl, 8 dwg