Needle-free injectors and design parameters thereof that optimize injection performance
US9662449B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2016 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Jan 15, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/30
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A needle free injector system and a method for delivering a formulation using this system are disclosed. The method comprises actuating a needle free injector to pressurize a liquid formulation and force the formulation through an orifice in a skin puncture phase followed by injection of the formulation during a delivery phase. The skin puncture phase is defined by a pressure profile vs. time curve after actuation which has a main pressure peak with a maximum pressure. The delivery phase occurs at a lower pressure than the maximum pressure of the main peak pressure. The device may have one or more orifices and pressurizing the formulation during the puncture phase and delivery phase to extrude the formulation through each orifice is structured so as to improve characteristics of needle free delivery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.