The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 25, 2000
Filed:
Sep. 16, 1997
Stephen Pizzimenti, Piscataway, NJ (US);
Mark T McClung, New Brunswick, NJ (US);
S.S. White Technologies Inc., Piscataway, NJ (US);
Abstract
An abrasive nozzle assembly comprises a casing, a nozzle head and an abrasive nozzle mounted coaxially to generate a high-velocity abrasive airstream. The nozzle head has a cavity with a nozzle orifice. The casing includes an air passage, which communicates, at one end, with a compressed air supply tube and, at another end, with the cavity. The abrasive nozzle includes an abrasive supply tube which passes axially through the casing and cavity to terminate at the nozzle orifice. A compressed air source feeds the compressed air supply tube. An abrasive mixture source feeds the abrasive supply tube. The abrasive nozzle acts as a primary nozzle directing a narrow abrasive airstream from the center of the nozzle orifice. The nozzle head, which acts as a secondary nozzle, discharges a ring-shaped, high-velocity, abrasive-free airstream from the periphery of the nozzle orifice. Within a short distance downstream from the nozzle orifice, the abrasive-free airstream and the abrasive airstream gradually diverge toward each other and mix to form the high-velocity abrasive airstream.