Automatic injection device with reduced residual volume
US11224694B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2017 |
| Grant date | Jan 18, 2022 |
| Priority date | — |
| Expiry date | May 6, 2038 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3125
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An automatic injection device including an injection syringe equipped with a syringe body and with a piston rod mounted movably in this syringe body so as to cover an injection stroke, a piston control member capable of changing between a configuration in which it is in engagement with the piston rod and a configuration in which it is disengaged from this piston rod, mechanism for moving the piston control member between its two configurations with respect to the piston rod. The mechanism for moving the control member between its two configurations includes a camway carried by a disengagement member and a cam carried by the control member. The disengagement member is movable with respect to the piston rod and the syringe body after the end of the injection stroke, in such a way as to cause the camway to interact with the cam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.