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US 7,887,737 B2Granted
Injection moulding of a catheter
AssigneeUnomedical A/S
InventorsSigne Thorning Mejlhede, Steffen Gyrn
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Abstract
A method for producing a one-piece catheter comprising a hub (3) and a tube-shaped flexible part (4) wherein the tube shaped flexible part (4) has an interior which is divided in two region one being cone-shaped (7-8) and one being cylindrical (5). A one-piece catheter of the above mentioned kind and a mould for moulding such catheter.
Claims10
A method for one-piece injection moulding of a soft needle catheter used together with an introducer needle comprising a hub and a tube-shaped flexible part, comprising the steps of:
- feeding a molten polymer into a mould comprising a core defining a cavity comprising a hub cavity and a tube-shaped cavity, said core having a cone-shaped part and a cylindrical part forming the interior of the catheter;
- removing the core from the catheter;
- and
- removing the catheter from the mould;
- wherein the cone-shaped part of the core forms at least a part of the hub cavity and extends into the tube-shaped cavity causing the interior of the tube-shaped flexible part to be at least partially cone shaped.
2 more elements
Dependencies are inferred from the claim text.