Syringe and syringe plungers for use with medical injectors
US7666169B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2003 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Oct 13, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/505
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A syringe plunger includes a wall having an inner surface and one or more inwardly projecting flanges disposed on the inner surface of the wall. Preferably, the inner surface of the wall defines a retaining shoulder formed along an axial plane thereof. An injector drive member preferably includes at least one retaining member adapted to engage the retaining shoulder of the syringe plunger to allow the drive member to retract the plunger with the body of the syringe. Further, the drive member preferably includes one or more outwardly extending flange members adapted to be engaged by the inwardly projecting flanges of the syringe plunger. When the syringe body is rotated, the at least one retaining member on the drive member is retracted and disengaged from the retaining shoulder of the syringe plunger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.