초록 ▼

An abrasivejet nozzle assembly is disclosed which is particularly suitable for drilling small diameter holes in a workpiece. Such assemblies include a mixing region wherein abrasive particles are entrained into a high velocity waterjet formed as high pressure water is forced through a jet-forming or

An abrasivejet nozzle assembly is disclosed which is particularly suitable for drilling small diameter holes in a workpiece. Such assemblies include a mixing region wherein abrasive particles are entrained into a high velocity waterjet formed as high pressure water is forced through a jet-forming orifice. Among the unique features of the nozzle assembly are an inwardly tapered abrasive path just upstream of the mixing region, flushing conduits immediately upstream and downstream of the mixing region, and a venting passageway upstream of the mixing region which prevents the backflow of abrasive dust towards the jet-forming orifice.

대표청구항 ▼

An abrasivejet nozzle assembly for use in an abrasive jet cutting system comprising: housing means having an inlet end for receiving high pressure liquid, and an outlet end downstream from the inlet end; jet-forming orifice-defining means positioned between the inlet and outlet ends for forming a hi

An abrasivejet nozzle assembly for use in an abrasive jet cutting system comprising: housing means having an inlet end for receiving high pressure liquid, and an outlet end downstream from the inlet end; jet-forming orifice-defining means positioned between the inlet and outlet ends for forming a high velocity liquid jet from the high pressure liquid, the housing means including an abrasive-conducting inlet passage for conducting abrasive from a source external to the nozzle assembly to a mixing region downstream from the jet-forming orifice so that abrasive becomes entrained in the jet, the housing means further including a discharge conduit downstream from the mixing region for conducting the jet and entrained abrasive out of the nozzle assembly. the housing means further including a venting passage in communication at one end with the environment external to the nozzle assembly, and in communication at its other end with the high velocity jet at a region between the jet-forming orifice and the mixing region, thereby providing an alternative path for Bernoulli-induced flow of external environmental gasses toward the jet-forming orifice which is different than the path defined through the discharge conduit.