Actuator for device for delivery of ophthalmic lenses
US9326848B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 2013 |
| Grant date | May 3, 2016 |
| Priority date | — |
| Expiry date | Apr 10, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2/1672
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The actuator comprises a barrel and a plunger received within the barrel. A clutch mechanism is operable between the plunger and the barrel. The clutch mechanism includes a driven member and a fixed member having respective castellations. The driven member carries pins which engage a three-start thread on the plunger. The castellations are urged into engagement by three annular springs. In the engaged condition of the clutch, the plunger is advanced by rotation relative to the barrel. An axial load on the plunger disengages the clutch mechanism, allowing the plunger to be advanced axially while rotating the driven member. Two-handed or one-handed operation according to a user's choice is therefore possible. The actuator can be used in combination with a lens delivery device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.