Patent ID: 6971680

Claim:
A dialysis coupler assembly comprising a pair of rubber-like elastic tubular couplers, and a pair of joint members for joining said couplers together, wherein each of said couplers includes an inner channel allowing a connector associated with a medical device to be fitted therein, and a smooth surface perpendicular to the longitudinal axis of said coupler, said couplers being adapted to be joined together through said joint members in such manner that said smooth surfaces are in liquid-tight contact with one another, and each of said joint members is adapted to be attached slidably and rotatably onto corresponding one of said couplers, said joint members having first and second engagement portions, respectively, wherein said first and second engagement portions are disposed opposed to one another and adapted to cooperatively engage said joint members with one another so as to allow said smooth surfaces to be brought into liquid-tight contact with one another, said first engagement portion is formed as at least two of convex portions protruding from corresponding said joint member along the longitudinal axis of said coupler, each of said convex portions including a pawl extending in the circumferential direction of said coupler; said second engagement portion is formed as at least two of concave portions for receiving therein said convex portions, respectively, each of said concave portions including a recess to be engaged with said pawl, wherein when said smooth surfaces are in compressively liquid-tight contact with one another, said convex portions are fitted with corresponding said concave portions while engaging said pawls with corresponding said recesses, wherein each of said pawl and recess has an engagement surface tapered in the circumferential direction.