Syringe
US4235235A · kind A · utility
51Cited by
4References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1978 |
| Grant date | Nov 25, 1980 |
| Priority date | — |
| Expiry date | Dec 11, 1998 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/342
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The needle end of the barrel of a pre-filled syringe is sealed by a stopper which is displaceable into the shaft of a needle holder. The stopper is displaced, to release injection fluid, by operation of the syringe plunger. One or more slots in the walls of the needle holder shaft and the rear face of the needle holder neck conduct fluid around the displaced stopper. The stopper substantially fills the shaft of the needle holder but does not cover the ends of the slots which adjoin the barrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.