Syringe having needle isolation features
US5308330A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1992 |
| Grant date | May 3, 1994 |
| Priority date | — |
| Expiry date | Sep 16, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/287
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A syringe having structure to isolate fluid from the distal end of the syringe includes a barrel with a chamber therein. A stopper is slidingly disposed in the chamber and is provided with an aperture extending axially therethrough. A plug includes a head releasably engaged in a sealing portion of the aperture of the stopper. A rigid tail extends distally from the head and through the aperture in the stopper and projects outwardly from the distal end of the stopper. The tail is long enough so that it can be used to move the head out of the sealing portion of the aperture by applying force to the distal end of the tail. The tail has a cross-sectional shape which defines at least one fluid channel between the tail and the sealing portion of the stopper to allow fluid to flow from the chamber through the aperture in the stopper and out of the distal end of the barrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.