Apparatus for coating removal
AssigneeYield Engineering Systems, Inc.
InventorsM Ziaul Karim, Dragan Cekic
Life of this patent
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Abstract
An apparatus for removing a coating from a substrate comprises a nozzle with an inner conduit having an orifice and an outer conduit coaxially arranged about the inner conduit and defining an annular opening between the inner and outer conduits. The nozzle is configured to direct a liquid stream through the orifice toward the coated surface and direct a gas flow through the annular opening such that the gas flow surrounds the liquid stream as the liquid stream moves towards the coated surface.
Claims20
An apparatus to remove at least a portion of a coating from a coated surface of a substrate, comprising:
- at least one nozzle extending from a proximal end to a distal end, wherein at least a distal end portion of the at least one nozzle extends along a longitudinal axis, and wherein the at least one nozzle includes,
- an inner conduit having an orifice at the distal end, wherein the inner conduit is configured to direct a liquid stream through the orifice to impinge on the coated surface,
- an outer conduit coaxially arranged about the inner conduit and defining an annular opening between the inner conduit and the outer conduit, wherein the outer conduit is configured to direct a gas through the annular opening to surround the liquid stream emanating from the orifice, and
- wherein the inner conduit extends further along the longitudinal axis than the outer conduit to create a gap between the orifice and the annular opening along the longitudinal axis such that at least a portion of the liquid stream emanating from the orifice impinges on the coated surface without intermixing with the gas emanating from the annular opening;
- and
- an outlet port configured to direct liquid from the liquid stream away from the substrate after the liquid stream impinges the coated surface.
An apparatus to remove at least a portion of a coating from a coated surface of a substrate, comprising:
- a nozzle extending along a longitudinal axis and including,
- an inner conduit configured to direct a liquid stream through an orifice to impinge on the coated surface such that liquid droplets of the liquid stream that impinges on the coated surface have a tear drop shape, wherein the tear drop shape is a shape with one end curved and an opposite end pointed;
- and
- an outer conduit coaxially arranged about the inner conduit and configured to direct a gas through an annular opening between the inner conduit and the outer conduit to surround the liquid stream emanating from the orifice, wherein the gas is directed through the annular opening such that the liquid stream that impinges on the coated surface impacts a first area of the coated surface smaller than a second area, and wherein the second area is an area of the coated surface that would be impacted by the liquid stream if the liquid stream is directed through the orifice without the gas being directed through the annular opening.
An apparatus to remove a coating from a coated surface of a substrate, comprising:
- a nozzle extending along a longitudinal axis, the nozzle including,
- an inner conduit having an orifice configured to release a liquid jet that impinges on the coated surface and removes at a portion of the coating by ablation, etching, or a combination of etching and ablation, and
- an outer conduit coaxially arranged about the inner conduit and defining an annular opening between the inner conduit and the outer conduit, wherein the outer conduit is configured to direct a gas through the annular opening to surround the liquid jet emanating from the orifice such that at least a portion of the liquid jet impinges on the coated surface without intermixing with the gas emanating from the annular opening.
Dependencies are inferred from the claim text.