Disposable safety syringe
US5163918A · kind A · utility
Inventors
Key dates
| Filing date | Jul 10, 1991 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Jul 10, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/919
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A disposable safety syringe includes a barrel (1), an injection needle (4) fitted on the fore end of barrel (1), and a plunger (6) slidable in the barrel (1) from a syringe-filling utmost retracted position to a syringe emptying forwardmost position. The barrel is fitted with a manually driven stem (7) protruding from the rear end of barrel (1). A longitudinally slidable protective sleeve (12) is slidably fitted on the outside of barrel (1) so as to be movable from a retracted rest position in which the needle (4) is exposed into an advanced safety position in which the protective sleeve (12) extends around the needle (4) and entirely covers the same. A locking device (23, 25) is provided for automatically retaining in a not retractile manner the protective sleeve (12) to the barrel (1) in its advanced safety position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.