Two-piece ostomy appliance and coupling therefor with rocking wedge lock
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
A two-piece ostomy appliance having a pair of coupling rings that detachably connect a collection pouch and an adhesive faceplate. One of the coupling rings, preferably the faceplate coupling ring, is provided with a substantially non-compressible insert that includes an axially-extending collar, a bulbous non-deformable wedge body, and a radially-extending pivot stem that centrally connects the collar and wedge body. The pivot stem allows limited forward and rearward rocking movement of the wedge body about a pivot axis extending through the stem. A massive front portion of the wedge body has an inwardly and rearwardly curved bearing surface of progressively increasing distance from the pivot axis so that the radial width of the insert decreases as the wedge body rocks rearwardly and forceably increases as it rocks forwardly about the axis, in response to frictional engagement with the walls of the channel, when coupling and uncoupling forces are exerted on the rings.
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Citations
21 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- said pouch having a stoma-receiving opening and a first coupling ring secured thereto about said opening;
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12. A coupling ring for a two-piece ostomy appliance;
- said ring being joined to a first component of said two-piece appliance consisting of either a faceplate or a pouch and including substantially non-compressible insert means for insertion into an axial channel of a mating coupling ring joined to a second component of said two-piece appliance;
said insert means including an axially-extending annular collar, a bulbous non-deformable body of toroidal shape, and an annular pivot stem connecting said body and collar in radially-spaced concentric relation;
said bulbous body including a front portion projecting forwardly beyond said stem away from said first component and a rear portion extending rearwardly beyond said stem toward said first component;
said stem supporting said body for limited forward and rearward rocking movement about a pivot axis; and
said front portion of said body having a rearwardly curved bearing surface of progressively-increasing distance from said pivot axis. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
- said ring being joined to a first component of said two-piece appliance consisting of either a faceplate or a pouch and including substantially non-compressible insert means for insertion into an axial channel of a mating coupling ring joined to a second component of said two-piece appliance;
Specification