US 12,343,467 B2
Spray nozzle chip and a medicament delivery device comprising the same
Niclas Roxhed, Bromma (SE); Torben Last, Osterode am Harz (DE); and Göran Stemme, Lidingö (SE)
Assigned to SHL Medical AG, Zug (CH)
Appl. No. 17/418,380
Filed by SHL MEDICAL AG, Zug (CH)
PCT Filed Dec. 27, 2019, PCT No. PCT/EP2019/087074
§ 371(c)(1), (2) Date Jun. 25, 2021,
PCT Pub. No. WO2020/151897, PCT Pub. Date Jul. 30, 2020.
Claims priority of application No. 19153766 (EP), filed on Jan. 25, 2019.
Prior Publication US 2022/0072241 A1, Mar. 10, 2022
Int. Cl. A61M 11/00 (2006.01); A61F 9/00 (2006.01); B05B 11/00 (2023.01); B05B 15/40 (2018.01)
CPC A61M 11/003 (2014.02) [A61F 9/0008 (2013.01); B05B 11/007 (2013.01); B05B 11/0072 (2013.01); B05B 15/40 (2018.02); A61M 2207/00 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A spray nozzle chip comprising:
a first layer provided with a first layer orifice; and
a mechanically flexible nozzle layer provided with a nozzle orifice,
wherein the first layer has a valve seat arranged to be aligned with the nozzle orifice, wherein the spray nozzle chip has a valve functionality obtained by movement of the nozzle layer relative to the valve seat due to pressure changes,
wherein the nozzle layer is arranged at a distance from the valve seat when the nozzle layer is in a default non-pressurised state, whereby a gap with a gap length (L) is formed between the nozzle layer and the valve seat,
wherein a valve seat intermediate layer is between the nozzle layer and the valve seat,
wherein the first layer and the nozzle layer are connected by means of an intermediate layer, such that the valve seat intermediate layer is thicker than the intermediate layer,
wherein the valve seat intermediate layer comprises a bonding layer,
wherein the bonding layer is a Parylene, and
wherein the bonding layer is configured to rupture when a liquid product is pressurised for a first delivery of an aerosol through the spray nozzle chip.