Dual chambered syringe
US4655747A · kind A · utility
61Cited by
3References
7Claims
0Family size
Inventor
Key dates
| Filing date | Jan 30, 1986 |
| Grant date | Apr 7, 1987 |
| Priority date | — |
| Expiry date | Jan 30, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/284
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A dual chambered syringe of the type having concentric barrels. The inner barrel can be formed of a generally conventional syringe, and the outer barrel is formed of a modified conventional syringe. A sealing ring of resilient rubber spaces the two barrels apart and forms a liquid seal between the two barrels. A passageway through the sealing ring is alignable with a hole in the inner barrel to allow communication between the two chambers. A rear plate is fixed to the inner barrel and rotatable on the outer barrel so the two barrels can be rotated to align the hole with the passageway when desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.