Automatic injector
US4822340A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1986 |
| Grant date | Apr 18, 1989 |
| Priority date | — |
| Expiry date | Oct 9, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3132
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An automatic injector for injecting one or more different injection liquids, comprising a combination of a substantially cylindrical means containing a discharge mechanism and a plurality of cartridge elements. The cartridge elements comprise a piston in the substantially cylindrical means, a sealing stopper, a number of separating stoppers equal to one less than the number of the liquids, and a needle holder with injection needle. The needle holder comprises a stopper that is movable in the substantially cylindrical means and comprises a longitudinal bore. The injector comprises a by-pass means for injection liquid in front of the sealing stopper. In another embodiment the injection comprises a combination of a discharge mechanism, a cartridge holder and a cartridge, the cartridge comprising a barrel including the plurality of cartridge elements, wherein the by-pass for injection liquid comprises at least one duct recessed in the wall of the shaft of the needle holder, the needle holder being connected to the barrel, at least one aperture being recessed in the front of the shaft of the needle holder. In yet another embodiment, the injector is suitable for accommodating a solid and…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.