Patent ID: 11931553
Assignee: W.L. GORE & ASSOCIATES GMBH
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 9:
10. A medical delivery device comprising:
a barrel having an inner surface; and
a stopper contacting at least a portion of the inner surface of the barrel, the stopper including two or more ribs, each rib having a compressibility of greater than 7.9% and providing a contact width (w) with the inner surface of the barrel in a compressed state, and
an injection member to displace the stopper;
wherein the stopper comprises an elastomeric body and the elastomeric body is at least partially covered with one or more fluoropolymer layers,
wherein the inner surface of the barrel has a water contact angle between about 1° and about 58°,
wherein the stopper has a retraction distance greater than about 10 mm.