Advancing mechanism for an injection device
US5496293A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 12, 1994 |
| Grant date | Mar 5, 1996 |
| Priority date | — |
| Expiry date | May 12, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/3156
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A feed mechanism for an injection device having an ampoule casing (13) includes an outer casing (2), an inner casing (3) protruding rearwardly from the outer casing and a toothed rack (4) longitudinally displaceable with the inner casing against the force of a spring (8). The rack has teeth (5) of which the length L corresponds to one full injection dose. The inner casing is longitudinally movable by a length L between two stops (6, 7) in the inner and outer casings. The inner casing has a latch (9, 10) which detachably locks the inner casing at its extreme forward position into an aperture (11) of the ampoule casing. A pawl prevents return movement of the rack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.