초록 ▼

A syringe nasal sprayer includes an elongate barrel having an open proximal end, a chamber for retaining fluid and a tip portion extending from a distal end of the barrel having a passageway therethrough communicating with the chamber. A stopper is slidably positioned in fluid-tight engagement insid

A syringe nasal sprayer includes an elongate barrel having an open proximal end, a chamber for retaining fluid and a tip portion extending from a distal end of the barrel having a passageway therethrough communicating with the chamber. A stopper is slidably positioned in fluid-tight engagement inside the barrel. An elongate plunger rod projects proximally from the stopper and extends outwardly from the open proximal end of the barrel. A spray nozzle extends outwardly from the tip portion and includes a conduit therethrough in fluid communication with the passageway. A distal end of the nozzle includes a spray aperture in fluid communication with the conduit. The nozzle also includes an internal valve for allowing liquid under pressure in the chamber to flow distally through the conduit and through the aperture while preventing unpressurized liquid in the chamber from flowing through the aperture.

대표청구항 ▼

A syringe sprayer comprising: an elongate barrel having an open proximal end, a chamber for retaining fluid and a tip portion extending from a distal end of said barrel having a passageway therethrough communicating with said chamber; a stopper slidably positioned in fluid-tight engagement inside sa

A syringe sprayer comprising: an elongate barrel having an open proximal end, a chamber for retaining fluid and a tip portion extending from a distal end of said barrel having a passageway therethrough communicating with said chamber; a stopper slidably positioned in fluid-tight engagement inside said barrel; an elongate plunger rod projecting proximally from said stopper and extending outwardly from said proximal end of said barrel; a spray nozzle extending outwardly from said tip portion of said barrel having a conduit therethrough in fluid communication with said passageway, a distal end of said nozzle having a spray aperture in fluid communication with said conduit; said nozzle including internal valve means for allowing liquid under pressure in said chamber to flow distally through said conduit and said aperture while preventing unpressurized liquid in said chamber from flowing through said aperture; and dose limiting means for preventing delivery of a pre-determined amount of liquid in said chamber through said passageway by limiting said distal motion of said plunger rod with respect to said barrel, said dose limiting means also including override means for allowing removal of said dose limiting means from said syringe sprayer and delivery of all of the liquid in said chamber.