Couplings for medical cannulae
First Claim
1. A coupling for a medical catheter comprising separate male and female members (1,2) which are connectable with a push fit, and a cap (7) coupled to the male member for surrounding the members and rotatable for releasable engagement with the female member for securing the members against being pulled apart, locking means on the cap and female member engageable to lock the cap against rotation in the loosening direction, wherein the cap (7) is rotatable by manually gripping and turning a holding section axially remote from the engagement between the male and female members, the holding section allowing the cap to be held during connection of the male and female members and during rotation of the cap relative to the female member, and wherein the locking means (14,17) are brought into engagement by axial displacement of an axially adjustable member (25) after the cap (7) has been rotated into securing cooperation with the female member.
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Accused Products
Abstract
A medical coupling has male and female members (1, 2) which push fit together, and a screw cap (7) which secures the members against separation. To prevent unintentional release of the cap, locking means, such as a ratchet and pawl mechanism, are provided between the cap and female member. Au outer shell (25) can enclose the cap for providing an enclosure around the fluid connection to deter bacterial contamination. Alternatively a separate capsule can enclose the coupling for this purpose. The two members and cap are connectable by holding gripping portions which are located remotely from the parts forming the fluid connection to reduce risk of contamination. A valve system is associated with the female member for closing a flexible tube connected to this member and to displace liquid to fill the space left in this member when the male member is disconnected from it.
71 Citations
22 Claims
- 1. A coupling for a medical catheter comprising separate male and female members (1,2) which are connectable with a push fit, and a cap (7) coupled to the male member for surrounding the members and rotatable for releasable engagement with the female member for securing the members against being pulled apart, locking means on the cap and female member engageable to lock the cap against rotation in the loosening direction, wherein the cap (7) is rotatable by manually gripping and turning a holding section axially remote from the engagement between the male and female members, the holding section allowing the cap to be held during connection of the male and female members and during rotation of the cap relative to the female member, and wherein the locking means (14,17) are brought into engagement by axial displacement of an axially adjustable member (25) after the cap (7) has been rotated into securing cooperation with the female member.
- 10. A coupling for a medical catheter comprising separate male and female members (1,2) which are connectable with a push fit, and a cap (7) for surrounding the members and rotatable for releasable adjustment with one of the members for securing the members against being pulled apart, and a shell member (25) for defining an enclosure around the cap and around the connection between the male and female members, wherein the shell member is adjustable axially relative to the cap from a retracted position, wherein the cap is rotatable by the shell member to an advanced position in which the shell member is rotatable relative to the cap, the shell member defining a holding section allowing the cap to be manually rotated into engagement with said one of the male and female members by holding the shell member remote from the cap.
Specification