Nasal delivery device including spray nozzle

A nasal spray nozzle for use with a drug container such as a syringe for delivering liquid substances including drugs and vaccines into a nasal passage, comprising:

• a rigid cap body having a passage extending between a spray aperture at one end and an opening at a second end that is adapted to be attached to a syringe containing the substance for delivering the substance to the nasal passage;
• an internal valve supported within the passage adjacent the spray aperture and spaced from the opening, the valve only allowing the substance to flow through the spray aperture under pressure such that a spray mist of substance is delivered from the spray aperture;
• and
• the internal valve comprising a two way valve enabling a fluid to be drawn into the drug container.

A nasal spray nozzle for use with a drug container such as a syringe for delivering liquid substances including drugs and vaccines into a nasal passage, comprising:

• a rigid cap body having a passage extending between a spray aperture at one end and an opening at a second end that is adapted to be attached to a syringe containing the substance for delivering the substance to the nasal passage;
• and
• an internal valve supported within the passage adjacent the spray aperture and spaced from the opening, the valve only allowing the substance to flow through the spray aperture under pressure such that a spray mist of substance is delivered from the spray aperture;
• a sleeve extending from the cap body and having an open end adapted to receive an elongate syringe barrel.

A nasal delivery device for delivering liquid substances including drug and vaccines to a nasal passage, comprising:

• a syringe having a body with an outlet opening at one end;
• and
• a spray nozzle including
• a rigid cap body having an internal passage extending between an inlet opening at one end and a spray aperture at a distal end;
• said cap body being sealingly secured to the syringe body adjacent the outlet opening;
• and
• a valve operational in two directions and being supported in the passage of the cap body between the spray aperture and the inlet opening allowing only pressurized substance to flow through the passage into and out of the spray aperture while also preventing unpressurized substance from flowing through the spray aperture.

A nasal delivery device for delivering liquid substances including drug and vaccines to a nasal passage, comprising:

• a syringe having a body with an outlet opening at one end;
• and
• a separate spray nozzle including
• a rigid cap body having an internal passage extending between an inlet opening at one end and a spray aperture at a distal end;
• said cap body being sealingly secured to the syringe body adjacent the outlet opening;
• and
• a valve supported in the passage of the cap body between the spray aperture and the inlet opening that allows only pressurized substance to flow through the passage and out of the spray aperture while also preventing unpressurized substance from flowing through the spray aperture;
• the syringe includes an elongate barrel that defines a chamber for containing the substance prior to the delivery of the liquid and a plunger rod for pushing the liquid out of the barrel, and wherein the cap body includes a generally elongated sleeve disposed over the syringe barrel, the sleeve including a sleeve flange that extends radially to accommodate a finger of a user to facilitate grasping the cap body and pushing the plunger rod to deliver the substance from the syringe to the nasal passage.