Injection syringe and disposal container for injection needle units
US6969374B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2001 |
| Grant date | Nov 29, 2005 |
| Priority date | — |
| Expiry date | Mar 24, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/581
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An injection syringe has a housing for a medicament ampule and a plunger movable longitudinally in the housing. A holder is connected to the syringe housing for detachably mounting an injection needle unit having a cannula support. The cannula support has a rearward end provided with a radial outer flange ring. A spreading sleeve is provided that is fastened with a cylinder ring on the syringe housing and has several elastic spreading tongues provided with forward ends remote from the cylinder ring and forming an annular cage. The spreading tongues have radial inner noses engaging the flange ring when the injection needle unit is inserted into the holder. An outer sliding sleeve surrounds the spreading sleeve and is movable against a spring force rearwardly. The front end of the sliding sleeve has an annular adjusting element that, upon rearward movement of the sliding sleeve, pushes the spreading tongues radially outwardly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.