Abrasivejet nozzle assembly for small hole drilling and thin ker

Details Abrasivejet nozzle assembly for small hole drilling and thin ker Abrasivejet nozzle assembly for small hole drilling and thin ker

1989-04-07

1990-08-28

Schmidt, Frederick R.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51436, 51410, B24C 504

Patent

active

049514296

ABSTRACT:
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.

REFERENCES:
patent: 2905050 (1961-03-01), Schwacha
patent: 4165587 (1979-08-01), Cottingham et al.
patent: 4555872 (1985-12-01), Yie
patent: 4563840 (1986-01-01), Urakami
patent: 4648215 (1987-03-01), Hashish et al.
patent: 4711056 (1987-12-01), Herrington et al.

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