Convertible plungers, film coated plungers and related syringe assemblies
US10561795B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2014 |
| Grant date | Feb 18, 2020 |
| Priority date | — |
| Expiry date | Aug 4, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/0238
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A convertible plunger is provided comprising an internal portion and a generally cylindrical exterior surface. At least a portion of the exterior surface is maintained in an initial expanded state by a property of the internal portion. The expanded state is reducible to a constricted state by an operation that is applied to the internal portion of the plunger to alter the property. A film coating may also be applied to a sidewall of the sleeve to reduce a sliding friction between the sleeve and barrel. A film coating may also be applied to a nose cone of the plunger to provide a barrier between the plunger and product in the barrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.