Medication dispensing apparatus with spring-driven locking feature enabled by administration of final dose
US7517334B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2005 |
| Grant date | Apr 14, 2009 |
| Priority date | — |
| Expiry date | Mar 25, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/2407
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A medication dispensing apparatus with a spring-driven locking feature includes a drive member movable in a distal direction within a housing, and a fluid container with a piston that is advanceable by the drive member (60) when such drive member is moved distally by a driving means. The apparatus includes a latching element (180) having a skid (190) that is slidable along a surface of the drive member as the drive member passes distally during advancement. The drive member is arranged with the skid so as to maintain a latching lip of the latching element against a spring force in a first position free of the driving means during dose preparing and injecting prior to a final dose administration. The skid-engaging surface shifts distally of the skid such that the skid passes beyond a proximal end of that surface upon administration of a final dose, whereby the latching lip is urged by the spring force from the first position to a second position to physically lock the driving means to prevent further dose preparing and injecting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.