Durable needle-less jet injector apparatus and method
US6648850B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 2001 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Jul 2, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3125
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A gas-powered, durable, needle-less hypodermic jet injection device (10, 110) includes a hand-held injector (12, 112) which provides a volume of liquid medication to be injected, an injection orifice, and an injection piston. Forceful movement of the injection piston causes an injection jet of medication to be expelled from the injection orifice. The injection device also includes a hermetically sealed gas pressure cartridge (28) which is opened in preparation to effecting a jet injection, and which powers the jet injection, but from which pressurized gas is not allowed to flow in volume until a user of the device shifts a valving spool (24).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.