Syringe assembly
US4986818A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1990 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | Mar 30, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3109
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A syringe assembly includes a barrel having an open proximal end, a chamber for retaining fluid and a tip portion extending from a distal end of the barrel having a passageway therethrough communicating with the chamber. A needle cannula having a distal end extends outwardly from the tip portion and includes a lumen in fluid communication with the passageway. A needle shield assembly includes a resilient needle sheath having an open proximal end, a closed distal end, a sidewall defining a receptacle therein and an annular flange extending radially outwardly from the proximal end of the needle sheath. The needle sheath is positioned within an elongate rigid shield having an open proximal end, a distal end and a sidewall therebetween. Structure for holding the sheath within the shield includes a flange-receiving aperture in the needle shield sidewall adjacent to the open proximal end. The aperture includes a ledge on its proximal side for engaging the proximal side of the flange for holding the sheath in the shield. Structure is also provided for deflecting the annular flange causing more of the annular flange to project into the flange-receiving aperture than if the structure were n…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.