Device for dosing a liquid preparation
US5679111A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1995 |
| Grant date | Oct 21, 1997 |
| Priority date | — |
| Expiry date | Mar 10, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/31578
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An injection device is provided for a continuously variable metering and administering of a liquid preparation and having a holder device for a multi-dose injection cartridge, the rear piston of which may be moved forward by means of a piston rod. The piston rod is provided with releasable locking means having at least one longitudinal groove having a wedge-shaped cross section and at least one locking lug having a cross section adapted to that of the groove, and means for urging the locking lug into said grooves to lock the movement of the piston rod, or to release the locking lug from said groove to free the movement of said piston rod. At its rear end, the piston rod is connected to a spring device for moving the piston rod forward and to a device for determining the stroke of the piston rod when the preparation is administered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.