Injection syringe for injecting two liquids
US4465476A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 10, 1982 |
| Grant date | Aug 14, 1984 |
| Priority date | — |
| Expiry date | Dec 10, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/284
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The injection syringe for injecting two liquids has a cylinder within which there are displaceably arranged in a liquid-tight fashion a piston as well as a separator piston member. The separator piston member divides the internal space of the cylinder into a first front compartment and a second rear compartment and is provided with a spacer rod arranged to be displaced in a liquid-tight fashion within a bore of the piston. Retaining or holder means ensure that the separator piston member maintains a constant spacing from the piston while the first liquid in the first front compartment is being ejected, whereas the separator piston member and the piston are displaceable relative to each other during ejection of the second liquid. The dual-liquid injection syringe is particularly utilized in computerized tomography for injecting a contrast medium and a flushing medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.