Exchangeable cartridge for an injection device
US11707575B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2020 |
| Grant date | Jul 25, 2023 |
| Priority date | — |
| Expiry date | Oct 22, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/273
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An exchangeable cartridge for an injection device is disclosed. The cartridge (3) comprises a container (4) and a plunger (10) connectable with a plunger rod (9). The container receives the plunger rod from its rear end. The plunger comprises a rod connector (12) connectable with a front portion (13), and the rod connector has a base portion (24), an outer wall section (15), an inner wall section (16), and a rod stop portion (17) encircled by the inner wall section. The inner wall section comprises several tongues (22) protruding rearwards from the base portion and defining an entrance opening (18) for the plunger rod. The inner wall section receives a front portion (13) of the plunger rod through the entrance, and the tongues are provided with retaining portions arranged to retain the front end portion during retraction of the plunger rod within the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.