Plunger assembly including a plunger rod for advancing a stopper through a syringe
US9827376B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2015 |
| Grant date | Nov 28, 2017 |
| Priority date | — |
| Expiry date | Dec 22, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/31518
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Provided herein is a plunger assembly for advancing a plunger through a barrel, such as the barrel of a pre-filled syringe. The plunger assembly includes a stopper adapter defining an aperture. The stopper adapter includes a first restraining member adjacent to the aperture. The plunger assembly also includes a plunger rod having a first end, a second end, and a plunger rod head disposed adjacent the first end of the plunger rod. The plunger rod head includes a second restraining member engageable with the first restraining member of the stopper adapter. The plunger assembly is configured such that as the plunger rod head is moved axially within the aperture of the stopper adapter, the first restraining member of the stopper adapter engages the second restraining member of the plunger rod head to secure the plunger rod head within the aperture. A syringe assembly with a plunger assembly is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.