Syringe needle isolation device
US5893842A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 1997 |
| Grant date | Apr 13, 1999 |
| Priority date | — |
| Expiry date | Mar 20, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/5046
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A syringe assembly having needle isolation features includes an elongate 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 include communication with the chamber. A valve housing extends outwardly from the tip portion of the barrel having a conduit therethrough in communication with the passageway. A needle cannula having a proximal end, a distal end and a lumen therethrough is provided. The proximal end of the needle is connected to the housing so that the lumen is in fluid communication with the conduit. The housing includes internal valve for allowing liquid under pressure in the chamber to flow distally through the conduit and the lumen while preventing unpressurized liquid in the chamber from flowing through the aperture. The internal valve includes a one-way valve structure for preventing liquid flow through the conduit in a proximal direction toward the chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.