Multiple precision dose, preservative-free medication delivery system
AssigneeAllergan Sales, Inc.
InventorsJohn J. Cogger, David S. Haffner
Life of this patent
Estimating the term…
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.
Claims37
Apparatus for instilling a medicament into an eye, said apparatus comprising:
- a medicament;
- rigid housing means containing a reservoir of the medicament;
- nozzle means for instilling a dose of the medicament into an eye;
- displacement means, sealing a front end of said rigid housing means and in fluid communication with said reservoir, for metering doses of medicament from said reservoir to said nozzle means and for forcing each metered dose through said nozzle means;
- and
- stopper means, slidably disposed within a rear end of said rigid housing means, for gradually decreasing a housing volume containing the medicament reservoir.
Apparatus for instilling a medicament into an eye, the apparatus comprising:
- a medicament;
- rigid housing means containing a reservoir of the medicament;
- displacement means, sealing a front end of said rigid housing means and in fluid communication with said reservoir, for metering doses of medicament from said reservoir to a nozzle means and for forcing each metered dose through said nozzle means;
- and
- stopper means, slidably disposed within a rear end of said rigid housing means, for preventing vacuum creation within said rigid housing means due to metering of doses from said reservoir, said stopper means sliding within said rigid housing means under the force of atmospheric pressure.
Apparatus for instilling a medicament into an eye, the apparatus comprising:
- a medicament;
- rigid housing means containing a reservoir of the medicament;
- nozzle means for instilling a metered amount of the medicament from the reservoir into an eye;
- reciprocating means, disposed in a front end of said housing means and in fluid communication with said reservoir, for transferring metered amounts of medicament from the reservoir to said nozzle means and for forcing each metered amount of medicament through said nozzle means;
- stopper means, slidably disposed within a rear end of said rigid housing means, for preventing vacuum creation within said rigid housing means due to metering of doses from said reservoir, said stopper means sliding within said rigid housing means under the force of atmospheric pressure.
Dependencies are inferred from the claim text.