초록

Device and method for delivering small microliter volumes of liquid preparations to the eye or other body part utilizing a gas stream to induce a controlled, preselected volume of liquid into the gas stream and to deliver the liquid in the form of small droplets to the desired site.

대표청구항 ▼

[ What is claimed is:] [1.] An unitary apparatus for delivering a liquid as droplets which comprises:a cylindrical housing having a closed top;a compartment in an upper portion of the housing adapted to contain the liquid;a piston and cylinder assembly positioned within the housing proximate the com

[ What is claimed is:] [1.] An unitary apparatus for delivering a liquid as droplets which comprises:a cylindrical housing having a closed top;a compartment in an upper portion of the housing adapted to contain the liquid;a piston and cylinder assembly positioned within the housing proximate the compartment;a spring positioned within the housing;a cocking device operable to hold the piston within the cylinder against the spring to a cocked position;an eductor pump positioned proximate the housing and including an inlet and an outlet for the flow of gas through the pump and a port to enable said liquid to enter the pump from the compartment for mixing with the gas flow;a passageway interconnecting the cylinder with said inlet connection to enable gas to flow from the cylinder to said inlet in response to movement of the piston from said cocked position;a release mechanism operable to release the piston from said cocked position and thereby enable the piston to force a quantity of gas to flow through said passageway and said pump;a feeder interconnecting the port of the pump with the liquid in said compartment to thereby educt a quantity of said liquid in response to the flow of said gas through the pump;the piston displacement and the sizes of the pump and the feeder being interrelated such that said quantity of gas educts and delivers a predetermined volume of said liquid to as droplets through said outlet.