Sidestream aerosol generator and method in variable positions

• US 5,533,497 A
• Filed: 03/27/1995
• Issued: 07/09/1996
• Est. Priority Date: 03/27/1995
• Status: Expired due to Fees

• Current Assignee: Steven L. Ryder
• Original Assignee: Steven L. Ryder
• Inventors: Ryder, Steven L.
• Primary Examiner(s): Burr, Edgar S.
• Assistant Examiner(s): RACITI, ERIC
• Application Number:
  US08/410,876
• Time in Patent Office: 470 Days
• Field of Search: 128/200.14, 128/200.18, 128/200.21, 128/200.12, 128/200.13, 128/204.14, 261/78.2, 261/DIG. 65, 239/392, 239/338, 239/346
• US Class Current: 128/200.21
• CPC Class Codes: A61M 11/06 of the injector type
• CPC Class Codes: A61M 15/00 Inhalators drug delivery in endotracheal tubes A61M16/04
• CPC Class Codes: B05B 7/0012 Apparatus for achieving spraying before discharge from the apparatus
• CPC Class Codes: B05B 7/2435 the carried liquid and the main stream of atomising fluid being brought together by parallel conduits placed one inside the other

Abstract

A device and method for the aerosolization of a liquid, includes a liquid reservoir having a three dimensional geometric shape within a hollow cylindrical housing and a gas nozzle in the liquid reservoir. An internal component having a three dimensional geometric shape conforming to the internal walls of the liquid reservoir, having a liquid conduit and a liquid orifice, and minimally spaced from the internal walls of the liquid reservoir and the gas nozzle. The gas nozzle coupled to pressurized gas source, produces a high velocity gas stream which exits through the liquid orifice. A subatmospheric pressure is created within the minimal space between the liquid conduit, and gas nozzle. The liquid is aspirated from the minimal space between the internal component and the internal walls of the liquid reservoir, to the minimal space between the liquid conduit, and gas nozzle and out the liquid orifice. A removable threaded cap with an aerosol outlet on the cylindrical housing, provides a seal between the inner surface of the cap, and the region of the minimal space between the internal component, and the internal walls of the liquid reservoir. The seal reduces the quantity of air aspirated from the minimal space, with improved aerosol output. As a result of the geometrical shape of the internal component conforming to the internal geometrical shape of the liquid reservoir, the device will generate an aerosol in any orientation from the vertical to above the horizontal positions.

Claims

1. An apparatus for aspirating and aerosolizing a liquid in a flow of gas under pressure comprising:

a housing defining a liquid reservoir with walls of a predefined three dimensional geometric shape, an aerosol outlet located at a first axial end of said reservoir and a gas nozzle formed at a second axial end of said reservoir, said nozzle having means for connecting to a pressurized gas source;

an internal component having an operative position and being formed of a substantially flat member having an axial dimension and shaped along same to conform substantially with said reservoir along a bisecting cross section thereof, said internal component having a cylindrical liquid conduit with a first axial end connected to said internal component and a second axial end distal therefrom, said liquid conduit surrounding said gas nozzle when in said operative position;

wherein said internal component and said cylindrical liquid conduit form a minimal capillary space between, respectfully, said walls of said liquid reservoir and said gas nozzle, said cylindrical liquid conduit having a liquid orifice at said second axial end, wherein said gas nozzle and said liquid orifice are in fluid communication with said minimal capillary space.

2. The apparatus of claim 1 wherein the liquid reservoir has an open end and a closed end, and wherein the walls of said liquid reservoir define a substantially U-shaped configuration in at least one spatial dimension.

3. The apparatus of claim 1 wherein the liquid reservoir has an open end and a closed end, and wherein a portion of the walls of said liquid reservoir proximate said open end have a cross section defined by a plane parallel to the plane of the open end, said cross section comprising an internal and an external surface, said internal and external surfaces each comprising a vertex defined by a substantially equal inward angle.

4. The apparatus of claim 1 wherein the internal component further comprises a spacer means for maintaining said minimal capillary space between the internal component and the liquid reservoir.

5. The apparatus of claim 1 further comprising a thin annular disk supported proximate to the second axial end of said cylindrical liquid conduit.

6. The apparatus of claim 1 wherein said means for connecting to a pressurized gas source further comprises a triangular gas conduit.

7. The apparatus of claim 1 wherein the liquid reservoir has an open end and a closed end, and the walls of said liquid reservoir define a substantially V-shaped configuration in at least one spatial dimension.

8. The apparatus of claim 7 wherein the V-shaped configuration is further modified by parallel portions extending from the ends of each leg of the V-shape opposite the vertex and extending away from the vertex.

9. The apparatus of claim 1 wherein the housing comprises a cylindrical shell having an upper and a lower end.

10. The apparatus of claim 9 wherein said housing further comprises at least one window in a lateral surface thereof.

11. The apparatus of claim 9 wherein said cylindrical shell comprises an upper end wall substantially perpendicular to the wall of said shell at said upper end, said upper end wall being slightly conically angled.

12. The apparatus of claim 11 further comprising a threaded end cap, wherein said upper end wall is matingly threaded to receive said threaded end cap.

13. The apparatus of claim 12 wherein said cap further comprises a seal means for sealing the reservoir, the minimal capillary space and the internal component from the ambient.

14. The apparatus of claim 12 further comprising a thin annular disk supported proximate to the second axial end of said cylindrical liquid conduit, said washer having an internal diameter.

15. The apparatus of claim 14, wherein said threaded end cap further comprises a central hollow cylinder having a lateral wall, a first axial end in communication with the open end of said liquid reservoir, and a second axial end having an end wall, at least one opening through said lateral wall proximal to said end wall of said second axial end, a hemispherical projection having an outer diameter approximately equal to said internal diameter of said washer to define a diffuser, and a rotating baffle fitting within the internal diameter of the washer.