US 12,220,719 B2
Spray nozzle chip
Daniel Säll, Segeltorp (SE); and Rasmus Renstad, Stockholm (SE)
Assigned to SHL Medical AG, Zug (CH)
Appl. No. 17/772,447
Filed by SHL MEDICAL AG, Zug (CH)
PCT Filed Oct. 6, 2020, PCT No. PCT/EP2020/077990
§ 371(c)(1), (2) Date Apr. 27, 2022,
PCT Pub. No. WO2021/089263, PCT Pub. Date May 14, 2021.
Claims priority of application No. 19207343 (EP), filed on Nov. 6, 2019.
Prior Publication US 2022/0395849 A1, Dec. 15, 2022
Int. Cl. B05B 12/00 (2018.01); B05B 1/14 (2006.01); B05B 15/40 (2018.01); B65D 83/28 (2006.01)
CPC B05B 12/008 (2013.01) [B05B 1/14 (2013.01); B05B 15/40 (2018.02); B65D 83/28 (2013.01)] 18 Claims
OG exemplary drawing
 
16. A spray nozzle chip comprising:
a substrate having a spray side and a sieve side;
a sieve membrane comprising a sieve orifice that is provided on the sieve side; and
a spray membrane provided on the spray side, where the spray membrane comprises,
a spray orifice;
a pressure sensing device that measures deformation of the spray membrane to obtain a measure of pressure on the spray membrane; and
a reference pressure sensing device that measures deformation of a reference pressure region associated with reference pressure sensing device,
wherein the substrate has a fluid channel which connects the spray orifice with the sieve orifice, and
wherein the substrate comprises a closed cavity operatively associated with the reference pressure region.