Passive reuse prevention syringe that uses a flange lock
US8790302B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2011 |
| Grant date | Jul 29, 2014 |
| Priority date | — |
| Expiry date | Aug 30, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/5026
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A syringe assembly includes a syringe barrel having an inside surface defining a chamber, an open proximal end, a distal end, and an outlet; a plunger assembly disposed at least partially within the syringe barrel, including an elongate plunger rod having a locking flange formed thereon; and a plunger head having a distal sealing surface, the plunger rod being engageable with the plunger head such that the plunger rod is adapted to move the plunger head within the chamber of the syringe barrel through an injection cycle; and a flange lock disposed at the open proximal end of the barrel. The flange lock is integral with the open proximal end of the syringe barrel. During the injection cycle, the flange lock engages the locking flange of the plunger rod so as to prevent removal of the plunger rod from the syringe barrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.