Fluid infusion system, a method of assembling such system and drug reservoir for use in the system
US8551045B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2007 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | Jul 21, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3151
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention relates to methods and devices for providing a reduced risk of free flow from medical devices such as an infusion pump. A medicament containing reservoir is provided with a piston having a sealing portion formed by a material of a first stiffness. The piston further comprises a frictional enhancing member having one or more reservoir wall engaging portions and being at least partly made of a material having a stiffness greater than the first stiffness. By arranging the frictional enhancing member to exert a radially outwards directed force component against the cylindrical wall an increased friction is provided between the piston and the reservoir wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.