Auto-flushing medical fluid injection system
US5643218A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1996 |
| Grant date | Jul 1, 1997 |
| Priority date | — |
| Expiry date | Aug 20, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3223
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A syringe for the sequential withdrawal of a first liquid and a second liquid. The syringe has a barrel, a proximal piston moveable along the barrel to define a variable volume chamber intermediate the piston and the end of the barrel, and a distal chamber divider piston for separating the variable volume chamber into primary and secondary reservoirs. A flow channel is defined along the syringe for providing flow connection between the primary and secondary reservoirs. An element links the two pistons so that as the proximal piston is moved away from the distal piston, the first liquid enters the first reservoir and thereafter the second liquid enters the secondary reservoir.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.