Autoinjector with shock reducing elements
US10722655B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2015 |
| Grant date | Jul 28, 2020 |
| Priority date | — |
| Expiry date | Aug 5, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3143
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An injection device, method, and system for drug delivery includes a primary container for storing a drug, the container having a stopper movably disposed in the container for expelling the drug, an injection drive mechanism comprising a plunger for acting on the stopper and an energy source for exerting a force on the plunger to cause the plunger to act on the stopper to expel the drug, the force causing the plunger to accelerate to a velocity prior to acting on the stopper, and a damping mechanism for reducing the velocity of the plunger prior to acting on the stopper. The damping mechanism can include a dashpot or an energy absorbing material associated with the plunger. Alternatively or additionally, the damping mechanisms can include absorbing material disposed between support members of an outer casing of the injection device and the primary container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.