Portable liquid drug delivery device
US10967120B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 23, 2019 |
| Grant date | Apr 6, 2021 |
| Priority date | — |
| Expiry date | Apr 12, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/14573
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A portable liquid drug delivery device has a reservoir part and a driving part, and the driving part has a drive that produces a torque. The reservoir part has a reservoir that retains liquid drug and an outlet port is in fluid communication with the reservoir. An engagement member has an inner thread that engages the thread of a piston rod in an engaged position and is disengaged from the thread of the piston rod in a disengaged position. The engagement member is prestressed in the disengaged position to thereby bias the engagement member toward the engaged position. The engagement member only converts the torque of the drive into a linear movement of the piston rod when the engagement member is in the engaged position. The piston is configured, upon the linear movement of the piston rod, to deliver the liquid drug to the outlet port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.