Two-piece ostomy appliance with faceplate bistable coupling ring

• US 5,312,382 A
• Filed: 06/03/1993
• Issued: 05/17/1994
• Est. Priority Date: 06/03/1993
• Status: Expired due to Fees

• Current Assignee: Hollister Incorporated
• Original Assignee: Hollister Incorporated
• Inventors: Metz, Michael
• Primary Examiner(s): Green, Randall L.
• Assistant Examiner(s): CLARKE, ROBERT A
• Application Number:
  US08/070,894
• Time in Patent Office: 348 Days
• Field of Search: 604/277, 604/278, 604/332-345
• US Class Current: 604/338
• CPC Class Codes: A61F 5/448 Means for attaching bag to seal ring

Abstract

A two-piece ostomy appliance comprising a pouch component and a faceplate component. The faceplate component has disposed thereon a dual-state, bistable coupling ring with a latching member for sealingly engaging the periphery of an opening in the pouch component. The coupling ring has an annular base defining a central opening and a contact face thereon surrounding the central opening. An annular collar extends from the base and a bistable latching member is joined to the collar along an annular hinge line, the latching member providing a contact surface and being pivotable about said hinge line. The latching member pivots about the hinge line between a stable, substantially untensioned first state wherein the latching member projects generally axially away from the collar and a stable, tensioned second state wherein the latching member extends in a reverse direction towards the annular base with said contact face of the latching member being positioned for tight engagement with the annular base'"'"'s contact face or with the annular periphery of the pouch component clamped between the base and the latching member.

Claims

1. A faceplate for a two-piece collection system comprising

a thin, flexible adhesive panel for adhesive attachment to a skin surface;

a coupling ring formed of flexible, semi-rigid polymeric material;

and attachment means for joining said coupling member to said panel;

said coupling ring having an annular base defining a central opening and a contact face surrounding said opening;

an annular collar extending from said base adjacent to and concentric with said opening, and a bistable annular latching member joined to said collar along an annular hinge line, said latching member providing a contact surface and being pivotal about said hinge line between a stable, substantially untensioned first state wherein said member projects generally axially away from said collar and a stable, tensioned second state wherein said member extends reversely towards said base with said contact surface of said latching member positioned for tight engagement with said base'"'"'s contact face;

said latching member including a free end portion;

said free end portion, when said member is in said second state, being under hoop stress and having an outside diameter greater than when said member is in said untentioned first state;

said latching member also passing through intermediate states as it is shifted between said first and second states;

said free end portion having an outside diameter in said tensioned second state smaller than said outside diameter of said free end portion in said intermediate states.

2. The faceplate of claim 1 in which said coupling ring is formed integrally of said flexible, semi-rigid polymeric material.

3. The faceplate of claim 1 in which said attachment means comprises a thin, flexible annular web having an inner edge secured to said panel and a concentric outer edge secured to said base of said coupling ring.

4. A two-piece collection system comprising a pouch component and a faceplate component;

said pouch component having a wall defining a stoma receiving opening;

said faceplate component comprising a thin, flexible adhesive panel for adhesive attachment to a skin surface, a coupling ring formed of flexible, semi-rigid polymeric material, and attachment means for joining said coupling ring to said panel;

said coupling ring having a base defining a central opening and a contact face surrounding said opening;

an annular collar extending from said base adjacent to and concentric with said opening, and a bistable annular latching member joined to said collar along an annular hinge line, said latching member providing a contact surface and being pivotal about said hinge line between a stable, substantially untensioned first state wherein said latching member projects generally axially away from said collar and a stable tensioned second state wherein said latching member extends reversely towards said base with said contact surface of said latching member releasably engaging a portion of said wall of said pouch component surrounding said stoma opening and clamping said wall portion against said contact face of said base, said stoma receiving opening of the pouch component having a diameter smaller than a maximum outside diameter of the latching member when the latching member is in its second stable state.

5. The two-piece ostomy appliance in claim 4 in which said coupling ring is integrally formed of said flexible, semi-rigid polymeric material.

6. The two-piece ostomy appliance of claim 4 in which said latching member includes a free end portion;

said free end portion, when said latching member is in its second state, being under hoop stress and having an outside diameter greater than when said latching member is in said untensioned first state.

7. The two-piece ostomy appliance of claim 6 in which said latching member passes through intermediate states as it is shifted between said first and second states, said free end portion having an outside diameter in said tensioned state smaller than the outside diameter of said free end portion in said intermediate states.

8. The two-piece ostomy appliance of claim 4 in which said attachment means comprises a thin, flexible annular web having an inner edge secured to said panel and a concentric outer edge secured to said base of said coupling ring.

9. The two-piece ostomy appliance of claim 4 in which said pouch component includes a flexible annular gripping ring having an inner edge portion externally secured to a peripheral area of said wall of said pouch component about said stoma receiving opening.

10. The two-piece ostomy appliance of claim 4 in which said wall of said pouch component is comprised of a relatively thin and weak water-insoluble interior layer and a relatively strong but water-soluble exterior layer.

11. The two-piece ostomy appliance of claim 10 in which said water-soluble exterior layer has an exposed edge at said stoma receiving opening;

said base, collar, and latching member of said coupling ring shielding said edge from contact with fluids passing through said latching member, collar, and base when said components are coupled together.

12. The two-piece ostomy appliance of claim 9 in which said gripping ring is formed of a water soluble polymeric material.