US 11,938,057 B2
Hydrodynamically actuated preservative free dispensing system
Yehuda Ivri, Newport Coast, CA (US)
Assigned to Bausch + Lomb Ireland Limited, Dublin (IE)
Filed by Bausch + Lomb Ireland Limited, Dublin (IE)
Filed on Oct. 25, 2021, as Appl. No. 17/509,383.
Application 17/509,383 is a continuation in part of application No. 17/233,105, filed on Apr. 16, 2021.
Claims priority of provisional application 63/011,808, filed on Apr. 17, 2020.
Prior Publication US 2022/0039998 A1, Feb. 10, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 9/00 (2006.01); A61B 17/00 (2006.01)
CPC A61F 9/0008 (2013.01) [A61B 2017/00057 (2013.01); A61B 2017/00889 (2013.01)] 18 Claims
OG exemplary drawing
 
1. Apparatus for delivering a liquid to an eye of a patient, the apparatus comprising:
a) a reservoir configured to contain the liquid;
b) a liquid dispenser in fluid communication with the reservoir, the liquid dispenser having i) a flexible aperture through which the liquid from the reservoir can be dispensed, and ii) a pin member for engagement with the flexible aperture to seal the flexible aperture;
c) an actuator designed to provide a mechanical excitation to the liquid dispenser that generates a corresponding hydrodynamic excitation of the liquid such that the liquid i) deforms the flexible aperture to disengage the pin member from the flexible aperture; and ii) ejects the liquid through the flexible aperture; and
d) a sensor positioned to measure frequency of the mechanical excitation and to provide feedback so that movement of the actuator can be adjusted to control its mechanical excitation.