Valve with self-sealing internal cannula
US5065783A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 1990 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | Sep 20, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/88062
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A valve insert includes an elongated cannula with first and second sharp ends. First and second elongated, flexible, elastomeric covers are respectively disposed over the first and second sharp ends of the cannula. Each cover is secured to an intermediate part of the cannula and is made of a material penetrable by the sharp ends of the cannula as the cannula moves longitudinally relative to the covers. The insert is mounted in an elongated bore through a valve body so that when a hypodermic syringe nozzle is inserted inito one end of the bore, the cannula and covers are displaced longitudinally, causing the sharp ends of the cannula to pierce the covers and open the cannula for fluid flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.