Patent ID: 7678089
Filing Date: 2010-03-16
Classification: A61F,A61M,B05B

Abstract:
1. An ophthalmic delivery device comprising: a body defining a fluid reservoir; a dosage chamber for holding a dosage of fluid; a nozzle including a valve seat and a valve cover, wherein the valve cover extends about the valve seat and forms an interface therebetween, and the interface defines an inlet in fluid communication with the dosage chamber and an outlet for dispensing fluid therethrough; and a pump in fluid communication with the reservoir and dosage chamber; wherein at least part of the valve cover is movable between (i) a closed position with the valve cover engaging the valve seat to close the interface and form a fluid-tight seal therebetween, and (ii) at least one open position with at least part of the valve cover spaced away from the valve seat in response to fluid flowing from the dosage chamber and into the inlet of the interface at a pressure greater than a valve opening pressure to allow the passage of pressurized fluid between the valve cover and valve seat; wherein the dosage chamber defines a first cross-sectional area and the valve seat defines a second cross-sectional area at the inlet to the interface with the valve cover greater than the first cross-sectional area to dispense each dosage of fluid through the interface at a velocity of less than approximately 10 meters per second.