Two-component syringe assembly
US4599082A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 13, 1984 |
| Grant date | Jul 8, 1986 |
| Priority date | — |
| Expiry date | Aug 13, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3104
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A two-component syringe includes a barrel having a chamber for retaining fluid and a distal end of the barrel having a passageway therethrough communicating with the chamber. A by-pass stopper is slidably positioned in fluid-tight engagement inside the barrel. The stopper has a distal rib contacting the barrel, a recess on the proximal side of the rib and a groove in the rib for allowing fluid communication between the recess and the chamber. This groove is positioned angularly with respect to the longitudinal access of the barrel so that liquid passing therethrough is directed angularly with respect to the longitudinal axis of the barrel. The barrel also includes a raised peripheral portion serving as a by-pass and defining a by-pass zone. The by-pass zone is shorter than the length of the stopper along the longitudinal axis of the barrel. The by-pass is sufficiently long and raised enough to allow liquid to flow around the stopper between the proximal end of the stopper and the recess when the proximal end of the stopper is positioned in the by-pass zone. Also included is a piston slidably positioned in fluid-tight engagement inside the barrel. This piston is adapted to engage a …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.