Methods of making an apparatus for providing aerosol for medical treatment

• US 7,771,642 B2
• Filed: 04/01/2005
• Issued: 08/10/2010
• Est. Priority Date: 05/20/2002
• Status: Active Grant

• Current Assignee: Novartis Ag
• Original Assignee: Novartis Ag
• Inventors: Regan, Des, Power, John, Smith, Niall
• Primary Examiner(s): Daniels; Matthew J.
• Application Number:
  US11/097,488
• Publication Number:
  US 20050178847A1
• Time in Patent Office: 1,957 Days
• Field of Search: 264/259, 264/272.11, 264/272.13, 264/272.15, 264/272.16, 310/344, 310/340, 310/345, 310/369
• US Class Current: 264/272.16
• CPC Class Codes: A61M 11/005 using ultrasonics spraying or atomising liquids using ultrasonic vibrations in general B05B17/06
• CPC Class Codes: A61M 15/0085 using ultrasonics spraying or atomising liquids using ultrasonic vibrations in general B05B17/06
• CPC Class Codes: B05B 17/0646 Vibrating plates, i.e. plates being directly subjected to the vibrations, e.g. having a piezoelectric transducer attached thereto

Abstract

Embodiments of the present invention include apparatus and methods for aerosolizing liquid. One embodiment of the invention provides an apparatus for generating an aerosol. The apparatus includes an actuator having a first face and a second face and defining an opening therethrough, as well as a vibratory element in mechanical communication with the actuator, and a sealing member configured to isolate the vibratory element from a surrounding environment. In accordance with certain embodiments, the apparatus further comprises an aerosolization element mounted on the actuator and disposed substantially over the opening, wherein the aerosolization element defines at least one aperture therethrough. Hence, the vibratory element may be operated to vibrate to cause movement of the aerosolization element in such a manner that a liquid at the first face of the aerosolization element can be dispensed as an aerosol through the at least one aperture. Some embodiments feature an electrode coupled to the vibratory element.

Claims

1. A method of making an aerosol generator assembly, the method comprising:

providing an aerosol generator, wherein the aerosol generator comprises;

an annular vibratory element;

an actuator in mechanical communication with the vibratory element, wherein the actuator has a first face and a second face and defines an opening therethrough, and wherein the actuator is cup-shaped, having a substantially cylindrical side wall extending from an outer edge of the first face, and wherein the annular vibratory element is positioned proximate the first face, within the substantially cylindrical side wall and around the opening; and

an aerosolization element mounted on one of the faces of the actuator and disposed substantially over the opening, wherein the aerosolization element comprises a first face and a second face and defines at least one aperture therethrough;

placing the aerosol generator within a mold assembly formed to receive the aerosol generator;

placing a mold material into the mold assembly;

allowing mold material to form a sealing element about at least an annular peripheral portion of the aerosol generator, the sealing element covering the annular vibratory element and the cylindrical side wall and at least a portion of the second face of the actuator, leaving the at least one aperture unobstructed, and leaving the aerosolization element substantially free to vibrate; and

removing the aerosol generator from the mold assembly.

2. The method of claim 1, wherein the mold material comprises an elastomer.

3. The method of claim 2, wherein the elastomer comprises a rubber.

4. The method of claim 3, wherein the rubber is a synthetic rubber.

5. The method of claim 3, wherein the rubber is silicone.

6. The method of claim 1, wherein placing the mold material into the mold assembly comprises injection molding the mold material.

7. The method of claim 1, wherein:

the vibratory element comprises an inner surface and an outer surface;

the aerosol generator further comprises an adhesive disposed between the actuator and the vibratory element and further disposed adjacent to at least a portion of at least one of the inner and outer surfaces of the vibratory element; and

the sealing element and the adhesive form a substantially fluid-proof barrier around the vibratory element.

8. The method of claim 1, further comprising applying at least one layer of bonding material between the mold material and least one of the vibratory element and the actuator.

9. The method of claim 8, wherein the aerosol generator further comprises at least one electrode coupled to the vibratory element, and wherein applying at least one layer of bonding material comprises forming a relatively impervious barrier between the at least one electrode and a surrounding environment.

10. The method of claim 8, further comprising preparing at least one of the vibratory element and the actuator.

11. The method of claim 10, wherein preparing comprises chemical etching.

12. The method of claim 8, wherein applying at least one layer of bonding material comprises applying the bonding material at room temperature.

13. The method of claim 8, wherein applying at least one layer of bonding material comprises applying a layer of a first bonding material and applying a layer of a second bonding material.

14. The method of claim 13, wherein the first bonding material and the second bonding material are the same bonding material.

15. The method of claim 13, wherein at least one of the bonding materials comprises an adhesive situated between the vibratory element and the actuator.

16. The method of claim 15, wherein the vibratory element comprises an inner surface and an outer surface, and wherein the adhesive is further situated between the sealing element and at least a portion of at least one of the surfaces of the vibratory element.