Medical delivery device with laminated stopper
AssigneeW. L. Gore & Associates, Inc.
InventorsGreg Rusch, Robert C. Basham
Life of this patent
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Abstract
The present disclosure relates to a medical delivery device that includes a barrel having an inner surface, a plunger rod having a distal end inserted within the barrel, and a stopper attached to the distal end of the plunger rod and contacting at least a portion of the inner surface of the barrel. In at least one embodiment, the inner surface is hydrophilic. The stopper may include an elastomeric body, one or more fluoropolymer layers, and two or more ribs laminated with the one or more fluoropolymer layers. In some embodiments, the contact width between at least one rib having a sealing surface and the portion of the inner surface of the barrel measured at a compressibility of greater than about 7.9% of the stopper is less than about 1.0 mm.
Claims17
A medical delivery device comprising:
- a barrel having an inner surface;
- a stopper contacting at least a portion of the inner surface of the barrel, the stopper comprising:
- an elastomeric body,
- one or more fluoropolymer layers, and
- two or more ribs having a sealing surface,
- wherein the one or more fluoropolymer layers is positioned on at least one of the two or more ribs, and
- wherein a contact width between at least one of the two or more ribs and a portion of the inner surface of the barrel measured at a compressibility of greater than about 7.9% of the stopper is less than about 1.0 mm.
Dependencies are inferred from the claim text.