Abrading – Machine – Sandblast
Reexamination Certificate
2005-09-20
2005-09-20
Wilson, Lee D. (Department: 3723)
Abrading
Machine
Sandblast
C451S102000, C451S446000
Reexamination Certificate
active
06945859
ABSTRACT:
A method and apparatus for controlling the coherence of a high-pressure fluid jet directed toward a selected surface. In one embodiment, the coherence is controlled by manipulating a turbulence level of the fluid forming the fluid jet. The turbulence level can be manipulated upstream or downstream of a nozzle orifice through which the fluid passes. For example, in one embodiment, the fluid is a first fluid and a secondary fluid is entrained with the first fluid. The resulting fluid jet, which includes both the primary and secondary fluids, can be directed toward the selected surface so as to cut, mill, roughen, peen, or otherwise treat the selected surface. The characteristics of the secondary fluid can be selected to either increase or decrease the coherence of the fluid jet. In other embodiments, turbulence generators, such as inverted conical channels, upstream orifices, protrusions and other devices can be positioned upstream of the nozzle orifice to control the coherence of the resulting fluid jet.
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Nishida, Nobuo et al., “The Development And Application Of Cleaning System By Submerged Jet,” pp. 365-372.
Sato, Kazunori et al., “A Study On Peening By Submerged Ultra-High-Speed Water-Jets,” pp. 413-424.
Baba Yasuo
Craigen Steven J.
Hashish Mohamed A.
Sciulli Felice M.
Flow International Corporation
Ojini Anthony
Seed Intellectual Property Law Group PLLC
Wilson Lee D.
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