초록

Apparatus for developing and handling an abrasive-laden gas stream for abrasive jet machining, employing equipment for storage, feeding, and control of abrasive powder in a carrier jet delivered through an upright feed tube at relatively high pressure and velocity.

대표청구항 ▼

Apparatus for developing and handling an abrasive-laden gas stream, comprising a substantially vertical feed tube having an upwardly directed inlet opening at its upper end and having a downwardly directed delivery nozzle at its lower end with a downwardly directed delivery nozzle opening, said vert

Apparatus for developing and handling an abrasive-laden gas stream, comprising a substantially vertical feed tube having an upwardly directed inlet opening at its upper end and having a downwardly directed delivery nozzle at its lower end with a downwardly directed delivery nozzle opening, said vertical tube and said nozzle having coaxial passages, a pneumatically pressurized receptacle in which said upwardly directed inlet opening is exposed, the receptacle having a lower closure through which the feed tube extends, a vibratory feed chamber in said pressurized receptacle, the feed chamber having a delivery duct adapted to feed a stream of particulate material into the upwardly directed inlet opening of said feed tube to provide for carrying the particulate material in a stream of gas downwardly through said tube to a region externally below said pressurized receptacle, the feed tube including vertically and axially aligned rigid tube elements with adjoining ends presented toward and spaced from each other in said region externally below said pressurized receptacle, and a flow shut-off valve in the region of the space between said vertically aligned tube elements, the shut-off device including a vertically extended tube formed of resilient material and having an inside diameter sufficient to engage and telescopically overlap the ends of the vertically aligned tube elements, rigid means surrounding the tube formed of resilient material and rigidly interconnecting the adjoining ends of said vertically aligned tube elements and a shut-off plunger positioned to horizontally pinch the resilient tube in said region below said pressurized receptacle.