Pre-filled ampule and non-invasive hypodermic injection device assembly
US4941880A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 12, 1988 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Dec 12, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3132
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pre-filled ampule and a powered, non-invasive injection device assembly wherein the device includes a housing having an ampule-receiving chamber, a gas charge, and means for delivering a predetermined amount of gas to an ampule-receiving chamber. The device includes an injection-counting ring which is received in a groove extending about the housing wherein the ring includes a counting mechanism thereon and is constructed to allow one-way only rotation thereof relative to the housing. The ampule includes an elongate ampule body having a medication holder located at one end thereof, a transfer area located adjacent the other end thereof and a bypass area located adjacent an end of the transfer area. A plunger is provided and has one end thereof received in and closing one end of the medication holder with the other end of the plunger being received in the ampule-receiving chamber of the injection device. A floating seal is received and encloses the other end of the medication holder. Orifice means are provided for forming a skin-piercing injection stream. Attachment means are provided for securing the ampule to the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.