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Liquid droplet spray device for an inhaler suitable for respiratory therapies

  • US 6,196,219 B1
  • Filed: 11/19/1998
  • Issued: 03/06/2001
  • Est. Priority Date: 11/19/1997
  • Status: Expired due to Term
First Claim
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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.

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