	US 12,295,875 B2
	Ostomy appliance coupling assembly
Simon Holroyd, London (GB); Dominic Baker, London (GB); Stefan Taal, London (GB); and Marko Plevnik, London (GB)
Assigned to CONVATEC LIMITED, Flintshire (GB)
Filed by CONVATEC LIMITED, Flintshire (GB)
Filed on Feb. 19, 2021, as Appl. No. 17/179,691.
Application 17/179,691 is a continuation of application No. PCT/GB2021/050409, filed on Feb. 19, 2021.
Claims priority of application No. 2002380 (GB), filed on Feb. 20, 2020; and application No. 2002388 (GB), filed on Feb. 20, 2020.
Prior Publication US 2021/0259875 A1, Aug. 26, 2021
Int. Cl. A61F 5/448 (2006.01)

CPC A61F 5/448 (2013.01) [A61F 2005/4486 (2013.01)]

20 Claims

1. A coupling assembly for an ostomy appliance comprising a locking arrangement, a first coupling and a second coupling, wherein the locking arrangement comprises:

a locking ring, mounted to the first coupling, forming an inner circumference and being adjustable between locked and unlocked configurations, wherein in the locked configuration the locking ring is for maintaining a coupled configuration between the first coupling and the second coupling and the inner circumference of the locking ring is less than in the unlocked configuration;

first and second grips mounted to the locking ring, wherein the first and second grips are positioned about the locking ring to be moveable towards one another to increase the inner circumference and adjust the locking ring from the locked configuration to the unlocked configuration;

a first grip constraining arrangement comprising a first constraining slot defined in the locking ring and a corresponding constraining pin extending from the locking ring and at least partially positioned within the first constraining slot; and

a second grip constraining arrangement comprising at least one constraining recess defined in the locking ring and a constraining protrusion extending from the first coupling, the constraining protrusion configured to be at least partially positioned in the at least one constraining recess;

wherein the first grip constraining arrangement and the second grip constraining arrangement are configured to constrain radial and circumferential movement of the first and second grips when the locking ring is adjusted between the locked and unlocked configurations.

12. A coupling assembly for an ostomy appliance, comprising:

a locking arrangement, a first coupling and a second coupling, wherein the locking arrangement comprises:

a locking ring, mounted to the first or second coupling, forming an inner circumference and being adjustable between locked and unlocked configurations;

first and second grips mounted to the locking ring and being moveable towards one another to increase the inner circumference and adjust the locking ring from the locked configuration to the unlocked configuration;

a first grip constraining arrangement comprising a first constraining slot defined in the locking ring and a corresponding constraining pin;

a second grip constraining arrangement comprising first and second constraining recesses extending radially outwardly from the inner circumference of the locking ring and located towards a first and second locking ring ends of the locking ring respectively and

a radially extending constraining protrusion extending from the first coupling and mounted in at least one of the first and second constraining recess;

wherein, the constraining protrusion remains in the first and second constraining recesses as the first and second grips are moved between the locked and unlocked configurations;