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

Claim 0:
1. A medical delivery device comprising:
a barrel having a first end, a second end, and an inner surface;
a stopper positioned within the barrel and contacting at least a portion of the inner surface of the barrel, the stopper having a compressibility of greater than 7.9% when measured against the barrel, said 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 coupled to the barrel to displace said 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°, and
wherein the stopper has a glide force variation less than about 1.3 N when calculated according to the Glide Force Variation test method, and
wherein the contact width (w) of at least one of said ribs is less than 1.0 mm and the sum of the contact widths of said ribs is less than 2.0 mm.