Ratchet systems for drug delivery devices
US11565052B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2018 |
| Grant date | Jan 31, 2023 |
| Priority date | — |
| Expiry date | Jul 28, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/43
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system comprises a first member, a second member, and a third member, wherein the first and second members are rotatable relative to the third member, wherein the first and second members are coupled to one another by a dead-angle follower coupling, wherein the dead-angle follower coupling is configured such that the first and second members are rotatable relative to one another, wherein the second and third members are rotationally coupled to one another by a switchable coupling mechanism, wherein the switchable coupling mechanism is switchable between two different states, a locked state and a non-locked state, wherein the maximum torque transferable between the second and third members via the switchable coupling mechanism in the locked state is greater than in the non-locked state, wherein the switchable coupling mechanism is in the locked state when the first member is in a locking position relative to the second member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.