NOSE CONE VENT DESIGN FOR INHALATION DEVICE
A pharmaceutical drug delivery device. The drug delivery device includes a device body, a fluid outlet nose cone attached to the drug delivery device body, and a fluid jet ejection cartridge containing a liquid pharmaceutical drug is disposed in the drug delivery device body. A fluid ejection head is attached to the fluid jet ejection cartridge and the fluid ejection head is in fluid flow communication with the fluid outlet nose cone. The fluid outlet nose cone has a plurality of air flow channels open to an ambient atmosphere for providing a pressure differential between an inner area of the fluid outlet nose cone adjacent to the fluid ejection head and the ambient atmosphere.
1 . A pharmaceutical drug delivery device comprising:
a drug delivery device body;
a fluid outlet nose cone attached to the drug delivery device body;
a fluid jet ejection cartridge containing a liquid pharmaceutical drug is disposed in the drug delivery device body, wherein a fluid ejection head is attached to the fluid jet ejection cartridge and the fluid ejection head is in fluid flow communication with the fluid outlet nose cone,
wherein the fluid outlet nose cone comprises a plurality of air flow channels open to an ambient atmosphere for providing a pressure differential between an inner area of the fluid outlet nose cone adjacent to the fluid ejection head and the ambient atmosphere.
2 . The pharmaceutical drug delivery device of claim 1 , wherein the pressure differential ranges from about 5 to about 10 kPa at an air flow rate of from about 50 to about 100 L/min.
3 . The pharmaceutical drug delivery device of claim 1 , wherein the plurality of air flow channels are adjacent to an exterior surface of the fluid outlet nose cone.
4 . The pharmaceutical drug delivery device of claim 1 , wherein the plurality of air flow channels extend along a long axis of the fluid outlet nose cone.
5 . The pharmaceutical drug delivery device of claim 1 , wherein the plurality of air flow channels comprise elongate channels in an exterior surface of the fluid outlet nose cone.
6 . The pharmaceutical drug delivery device of claim 5 , wherein the elongate channels are partially covered by an outer nose cone structure.
7 . The pharmaceutical drug delivery device of claim 1 , wherein the plurality of air flow channels have a combined air flow area ranging from about 8.0 to about 17.5 mm 2 .
8 . The pharmaceutical drug delivery device of claim 1 , wherein the nose cone further comprises a twistable closure configured to provide a variable air flow rate ranging from about 50 to about 100 L/min.
9 . A method for reducing a pressure differential on a fluid jet ejection head for a nasal spray device, the method comprising:
providing a fluid outlet nose cone attached to a body for the nasal spray device; a fluid jet ejection cartridge disposed in the body, the fluid jet ejection cartridge containing the fluid ejection head in fluid flow communication with the fluid outlet nose cone and a pharmaceutical drug in the fluid jet ejection cartridge;
providing a plurality of air flow channels open to an ambient atmosphere for providing a pressure differential between an inner area of the fluid outlet nose cone adjacent to the fluid ejection head and the ambient atmosphere; and
activating the nasal spray device while flowing air through the air flow channels when the fluid outlet nozzle is inserted into the nasal passage of a user thereby preventing fluid from drooling from the fluid ejection head upon inhalation by a user of the nasal spray device.
10 . The method of claim 9 , wherein the pressure differential ranges from about 5 to about 10 kPa at an air flow rate of from about 50 to about 100 L/min.
11 . The method of claim 9 , wherein the plurality of air flow channels are adjacent to an exterior surface of the fluid outlet nose cone.
12 . The method of claim 9 , wherein the plurality of air flow channels extend along a long axis of the fluid outlet nose cone.
13 . The method of claim 9 , wherein the plurality of air flow channels comprise elongate channels in an exterior surface of the fluid outlet nose cone.
14 . The method of claim 13 , wherein the elongate channels are partially covered by an outer nose cone structure.
15 . The method of claim 9 wherein the plurality of air flow channels have a combined air flow area ranging from about 8.0 to about 17.5 mm 2 .
16 . The method of claim 15 , wherein the nose cone comprises a twistable closure, further comprising twisting the twistable closure to increase or decrease the combined are flow area.
17 . A nose cone for a nasal spray device, comprising a fluid inlet adjacent to a fluid jet ejection head and a fluid outlet for delivery of a pharmaceutical drug to a nasal cavity of a user, wherein the nose cone comprises a plurality of air flow channels in an exterior surface thereof for providing a pressure differential between the fluid inlet and the ambient atmosphere.
18 . The nose cone of claim 17 , wherein the pressure differential ranges from about 5 to about 10 kPa at an air flow rate of from about 50 to about 100 L/min.
19 . The nose cone of claim 17 , wherein the plurality of air flow channels extend along a long axis of the nose cone.
20 . The nose cone of claim 17 , wherein the plurality of air flow channels comprise elongate channels.
21 . The nose cone of claim 20 , wherein the elongate channels are partially covered by an outer nose cone structure.
22 . The nose cone of claim 17 , wherein the plurality of air flow channels have a combined air flow area ranging from about 8.0 to about 17.5 mm 2 .
23 . The nose cone of claim 17 , wherein the nose cone further comprises a twistable closure configured to provide a variable air flow rate ranging from about 50 to about 100 L/min.