Medical delivery devices having low lubricant syringe barrels
US11931553B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2019 |
| Grant date | Mar 19, 2024 |
| Priority date | — |
| Expiry date | Sep 13, 2042 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3143
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present disclosure relates to medical delivery devices that include a barrel having an inner surface, and in at least one embodiment, the inner surface is hydrophilic. The medical delivery device may further include a stopper may having an elastomeric body, one or more fluoropolymer layers, and two or more ribs laminated to the one or more fluoropolymer layers. In some embodiments, the contact angle of the inner surface of the barrel is less than about 58°. Additionally, the stopper includes a sliding surface that is less than about 2.0 mm. The barrel provides inner surface that in combination with the fluoropolymer laminate or fluoropolymer film achieve high levels of air and liquid impermeability while also maintaining an acceptably low break loose force, low average glide force, and low glide force variation. In some embodiments, the compressibility stopper against the barrel is greater than about 7.9%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.