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Ostomy appliance and coupling ring assembly therefor

  • US 4,786,285 A
  • Filed: 12/18/1986
  • Issued: 11/22/1988
  • Est. Priority Date: 12/18/1986
  • Status: Expired due to Fees
First Claim
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1. An ostomy appliance including a pouch having a stoma opening;

  • an adhesive faceplate having an aperture alignable with said opening; and

    a coupling ring assembly detachably joining said pouch and faceplate together;

    said coupling ring assembly including a pouch ring secured to said pouch about said opening and a faceplate ring secured to said faceplate about said aperture;

    said rings being formed of flexible plastic material each having an annular wall extending about a central opening;

    wherein the improvement comprises each of said rings having a generally C-shaped portion, when viewed in radial cross-section, defining an axially-facing channel;

    the C-shaped portion of one of said rings being nested and retained within the channel of the other of said rings when said rings are coupled together, with said one ring constituting an inner ring and said other ring constituting an outer ring in said nested relationship;

    said outer ring, when viewed in radial cross-section, having an inner surface that is smoothly curved in the shape of an incomplete circle;

    said inner ring, when viewed in radial cross-section, having an undulating outer surface providing a plurality of circumferential ridges that face inwardly and outwardly in generally opposite radial directions and define circumferential grooves therebetween;

    said ridges sealingly engaging said inner surface along generally radially opposite sides of said inner ring so that said grooves form circumferentially-extending fluid-isolating reservoirs when said rings are coupled together.

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