Multiple dosage injector with rotating screw dosage system
US10300207B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2014 |
| Grant date | May 28, 2019 |
| Priority date | — |
| Expiry date | Nov 8, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F11/027
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A dispensing mechanism for delivering a dosage of medicament including a housing having a proximal-distal axis; a plunger rod having a screw thread and configured to advance along the proximal-distal axis relative to the housing; a user-operable push button moveable along the proximal-distal axis relative to the housing; a twist driver threadably engaged with the push button such that movement of the push button towards the distal end of the housing causes rotation of the twist driver about the proximal-distal axis; and a driver engaged with the twist driver such that rotation of the twist driver causes rotation of the driver, the driver also engaged with a portion of the plunger rod such that rotation of the driver causes rotation of the plunger rod, advancing the plunger rod along the proximal-distal axis relative to the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.