Syringe with spring biased needle cover
US5947936A · kind A · utility
Inventor
Key dates
| Filing date | Oct 23, 1998 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Oct 23, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3267
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A syringe with a spring biased needle cover that is biased into a fully extended position by the biasing spring to automatically cover the needle of the syringe. The syringe includes a syringe plunger, a syringe body and a cover assembly including a needle tube with a biasing spring positioned therein and a locking tab extending outwardly at an angle therefrom and a slidable needle cover member slidably positioned over the end of the needle tube and lockable in the fully extended position by the locking tab; the locking tab being depressible against the needle tube to allow the cover member to slide over the needle to reveal the needle for use; the biasing spring biasing the cover member back into the fully extended position covering the end of the needle when a retracting force supplied by the user is removed; the needle tube including two guide slots formed through the sidewall thereof; the cover member including two retaining tabs, each of the retaining tabs being slidably entrapped within one of the guide slots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.