Multiple precision dose, preservative-free medication delivery system
US6254579A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1999 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Nov 8, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2210/0004
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Apparatus for instilling a medicament into an eye includes a rigid housing for containing a reservoir of medicament and a nozzle for instilling a dose of the medicament into an eye. A displacement pump, sealing a front end of the rigid housing and in fluid communication with the reservoir, provides for metering doses of medicament from the reservoir to the nozzle and for forcing each metered dose through the nozzle. A stopper, slidably disposed within a rear end of the rigid housing, provides for gradually decreasing the housing volume containing the medicament reservoir. A diaphragm provides for accommodating transient decreases in the volume containing the medicament reservoir during metering of doses therefrom by the displacement pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.