Drug injection control device having structure in which rod lock screw-coupled to piston rod can make linear motion under restricted rotation within rod holder
US12427263B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 2021 |
| Grant date | Sep 30, 2025 |
| Priority date | — |
| Expiry date | Sep 20, 2043 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/31585
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A drug injection control device has a structure in which a rod lock screw-coupled to a piston rod can make a linear motion under restricted rotation within a rod holder with the rotation of a rod guide and the sub-linear motion of the piston rod. When the injection amount of drug is preset through an injection amount setting module to make a rotational motion with a dose dial in a housing to set the amount of drug to be injected by storing the twisting moment in a torsion spring, in actuating a drug delivery module switchably coupled to the injection amount setting module, the rod lock can make a linear motion by the sliding motion of a lock protrusion through a lock guide formed through the rod holder along the lengthwise direction on the rotation of the rod guide and the sub-linear motion of the piston rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.