Liquid droplet spray device for an inhaler suitable for respiratory therapies
First Claim
1. Liquid droplet spray device, comprisinga substrate, a space within the substrate for containing a liquid substance an inlet channel for connecting a source of liquid with said space, an outlet structure comprising a tapered cavity, disposed in said space of said substrate and having a cut-off pyramid-shape with a top surface, at least one outlet and at least one output channel connecting said top surface of the tapered cavity to said at least one outlet, wherein said outlet and said output channel have a straight non-tapered shape, and a vibrating element disposed to vibrate liquid in said space and eject the liquid through the at least one outlet.
3 Assignments
0 Petitions
Accused Products
Abstract
The liquid droplet spray device (5) has a micromachined substrate (8, 18, 18a; 8a, 18, 18a), a space (9) within the substrate for containing a liquid substance (4), an inlet channel for supplying (7) the liquid (4) to the space (9), and outlet structure (13, 14, 15) for ejecting the liquid as a mono-dispersive droplet spray when the liquid undergoes a vibration. The outlet structure comprises a cut-off pyramid-shaped tapered cavity (13) which is micromachined in the space (9). The outlet structure further comprises at least one output (14) and output channel (15) connecting the tapered cavity (13) to the outlet (14), the outlet (14) and the output channel (15) having a non-tapered vertical shape. Thanks to such a device, the exact amount ejected may be determined accurately which allows for a predicted lung deposition of the droplets by using appropriate control means adapted to the kind of patient.
-
Citations
27 Claims
-
1. Liquid droplet spray device, comprising
a substrate, a space within the substrate for containing a liquid substance an inlet channel for connecting a source of liquid with said space, an outlet structure comprising a tapered cavity, disposed in said space of said substrate and having a cut-off pyramid-shape with a top surface, at least one outlet and at least one output channel connecting said top surface of the tapered cavity to said at least one outlet, wherein said outlet and said output channel have a straight non-tapered shape, and a vibrating element disposed to vibrate liquid in said space and eject the liquid through the at least one outlet.
Specification