Syringe having safety shield
US5947933A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1998 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Sep 30, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/3243
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A hypodermic syringe assembly is provided with a syringe barrel and a safety shield telescoped over the syringe barrel and movable from a proximal position to a distal position. The safety shield is irreversibly lockable in the distal position on the syringe barrel to protectively shield a used needle cannula. The safety shield is releasably retained in a proximal position by engagement of a protrusion on the barrel and a groove on the shield. Engagement between the protrusion and the stop block can be overcome by rotating the safety shield. The safety shield may then be moved into an irreversible shielding position surrounding the needle cannula. The releasable retention of the safety shield in its proximal position prevents inadvertent distal movement of the safety shield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.