Injection device with deliver phase velocity regulator
US11344675B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 2018 |
| Grant date | May 31, 2022 |
| Priority date | — |
| Expiry date | Nov 11, 2038 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3152
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Disclosed is an injection device for delivering a medicament from a syringe contained within a housing, the device being configured to move the syringe through the housing to cause insertion of a needle of the syringe into a user's skin and move a syringe bung through a syringe body, delivering medicament through the needle. The device includes: a plunger engaging the bung; a sleeve around the plunger; an insertion spring biasing the sleeve to the housing; and a delivery spring biasing the plunger to the sleeve. A release mechanism releases the sleeve from the housing to commence insertion and release the plunger from the sleeve, following insertion, delivering medicament. A velocity regulator regulates the plunger upon release and disengages during delivery, and includes a screw thread associated with the sleeve or plunger and one or more thread engaging members formed on the other of the sleeve and the plunger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.