Single-use needle-less hypodermic jet injection apparatus and method
US6783509B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2000 |
| Grant date | Aug 31, 2004 |
| Priority date | — |
| Expiry date | Sep 13, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3132
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A needleless injector system including: a first injector assembly; a gas capsule disposed within the first injector assembly and containing pressurized gas, with a pierceable surface at the forward end thereof to provide an injection source; a gas capsule piercing member disposed within the first injector assembly, where the piercing member and the gas capsule are movable relative to each other; a second injector assembly containing a medical treatment fluid and having a forward facing injection orifice for injecting the medical treatment fluid into a patient; and a resilient seal mounted between the gas capsule and the first injector assembly to contain all pressurized gas within a forward end of the first injector assembly after pressurized gas is released from the gas capsule following piercing of the gas capsule, in order to cause an immediate increase in pressure in the medical treatment fluid contained within the second injector assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.