Two compartment mixing syringe
US4693706A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 11, 1986 |
| Grant date | Sep 15, 1987 |
| Priority date | — |
| Expiry date | Aug 11, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/31598
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A mixing syringe having an inner cylindrical barrel open at one end, and closed at its other end by a thin, tough, membrane bonded thereto. The barrel may contain a first liquid. A plunger inserted in the barrel has a sliding, sealing head which applies pressure to the liquid to rupture the membrane when the plunger is advanced. The barrel is slidably inserted in an open end of an outer barrel in sealing relationship therewith, and has a tip on the other end of the outer barrel. The outer barrel contains a liquid or other material to mix with the first liquid when the membrane is ruptured. The mixture is discharged from the outer barrel via the tip when the inner barrel is advanced axially in the outer barrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.