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Two-piece ostomy appliance and coupling therefor with rocking wedge lock

  • US 5,185,008 A
  • Filed: 06/21/1991
  • Issued: 02/09/1993
  • Est. Priority Date: 06/21/1991
  • Status: Expired due to Term
First Claim
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1. A two-piece ostomy appliance comprising a collection pouch and adhesive faceplate means for peristomal attachment to a patient;

  • said pouch having a stoma-receiving opening and a first coupling ring secured thereto about said opening;

    said first coupling ring having a pair of spaced concentric side walls and a connecting wall capable of being flexed to define an expandable annular channel facing axially away from said pouch; and

    a second coupling ring having annular insert means receivable in said expandable channel for sealing and locking engagement with said first ring;

    wherein the improvement comprisessaid annular insert means being substantially non-compressible and frictionally engagable with both of said side walls;

    said insert means including an axially-extending annular collar, a bulbous non-deformable body of toroidal shape, and an annular radially-extending pivot stem connecting said non-deformable body and annular collar in concentric relation;

    said body including a front portion projecting forwardly beyond said stem toward said pouch and a rear portion extending rearwardly beyond said stem away from said pouch, with both said front and rear portions being spaced radially from said collar;

    said stem supporting said body for limited forward and rearward rocking movement about a pivot axis at said stem;

    said front portion of said body having a rearwardly curved bearing surface of progressively increasing distance from said pivot axis;

    whereby, the width of said non-compressible insert means decreases as said non-deformable body rocks rearwardly and increases as said body rocks forwardly about said pivot axis, in response to frictional engagement with a wall of said channel, when coupling and uncoupling forces, respectively, are applied to said rings.

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