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Orifice device for delivering drugs at low fluid flow rates

  • US 7,678,103 B2
  • Filed: 06/12/2003
  • Issued: 03/16/2010
  • Est. Priority Date: 06/12/2003
  • Status: Expired due to Term
First Claim
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1. An orifice device for delivering a drug comprising:

  • an inner member having a proximal end and a distal end;

    a winding helically wound around the inner member, wherein the winding comprises a wire and wherein the wire has a width ranging from 0.001-0.050 inches;

    the exterior surface of the winding and the inner member defining a first channel having a helical flowpath following the curvature of the winding for carrying a drug therethrough and an inlet at the proximal end of the winding and an outlet at the distal end of the winding;

    a first drug carrying path defined by a first inlet at the proximal end of the winding, the first channel having a helical flowpath following the curvature of the winding, and a first outlet at the distal end of the winding;

    an outer member over the winding, wherein the exterior surface of the winding and the outer member define a second channel having a helical flow path following the curvature of the winding for carrying a drug therethrough; and

    a second drug carrying path defined by a second inlet at the proximal end of the winding, the second channel having a helical flowpath following the curvature of the winding, and a second outlet at the distal end of the winding, wherein the first and second drug carrying paths are capable of delivering two separate drugs.

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