Inhalator with aerosolizing unit

• US 6,889,687 B1
• Filed: 11/02/2000
• Issued: 05/10/2005
• Est. Priority Date: 11/02/1999
• Status: Expired due to Term

• Current Assignee: Shl Medical AG
• Original Assignee: SHL Medical AB (SHL Group AB)
• Inventors: Olsson, Thomas
• Primary Examiner(s): Dawson, Glenn K.
• Assistant Examiner(s): Erezo, Darwin P
• Application Number:
  US10/129,072
• Time in Patent Office: 1,650 Days
• Field of Search: 128/200.14, 128/200.15, 128/200.16, 128/200.17, 128/200.21, 128/200.23
• US Class Current: 128/200.14
• CPC Class Codes: A61M 11/007 Syringe-type or piston-type sprayers or atomisers
• CPC Class Codes: A61M 15/0091 mechanically breath-triggered
• CPC Class Codes: A61M 15/0093 without arming or cocking, e.g. acting directly on the delivery valve
• CPC Class Codes: A61M 15/06 Inhaling appliances shaped like cigars, cigarettes or pipes

Abstract

A portable, handheld breath actuated inhalator, to aerosolize and distribute a pressurised liquid, including a breath flow path defined between an air inlet (132) and a mouthpiece (131) outlet, a container (30) for the liquid, an aerosolizing element (115) for introducing the aerosolized liquid into the breath flow path, a valve element (113) between the container and the aerosolizing means for allowing fluid communication between the container and the aerosolizing element, and an actuator to regulate the valve element. The actuator is mechanical and is energized by the flow of inhaled air.

Claims

1. A portable, handheld breath actuated inhalator, to aerosolize and distribute a pressurised liquid, including, arranged in a housing,

a breath flow path defined between an air inlet and a mouthpiece outlet,

a container containing the liquid to be distributed,

mechanical pressurizing means for constantly applying a pressure on the liquid in said container,

a liquid conduit in flow communication with an interior of said container,

an aerosolizing membrane with through pores of microscopic size in said breath flow path and in flow communication with said liquid conduit, said aerosolizing membrane aerosolizing the pressurized liquid and introducing the aerosolized liquid into the breath flow path,

a mechanical valve means between said container and said aerosolizing membrane for controlling fluid communication between said container and said aerosolizing membrane, thereby controlling the introduction of the aerosolized liquid into the breath flow path, and

a mechanical actuating means in said breath flow path, said mechanical actuating means for opening said mechanical valve means when a first level of an inhalation flow parameter in said breath flow path is reached and for closing said mechanical valve means when a second level of the inhalation flow parameter is reached.

2. The inhalator according to claim 1, wherein said valve comprises a sleeve (113) surrounding a tubular conduit (118) for slidable, sealing movement along said conduit (118), said conduit having a first section (141) in fluid communication with the container (30) of the liquid, and said first section (141) having an outlet opening (144), and a second section (142), separate from said first section (141), in fluid communication with the aerosolizing membrane (115) and said second section (142) having an inlet opening (145),

wherein said sleeve (113) includes a channel (147) and a sealing section (146) arranged such that said sealing section (146) in a first position of said sleeve (113) seals said outlet (144) and inlet (145) openings, respectively, and in a second position of said sleeve (113) communication is opened between said outlet opening (144) and said inlet opening (145) via said channel (147);

and wherein said mechanical actuating means comprises a flange member (149) connected to said sleeve for moving therewith, said flange member (149) being arranged in the breath flow path to be movable by the action of the air flow to move the sleeve from said first position to said second position, and a spring means (148) for returning said sleeve to said first position.

3. The inhalator according to claim 1, wherein said inhalation flow parameter is selected from the group consisting of the inhalation flow rate and the inhalation air pressure within the breath flow path.

4. The inhalator according to claim 1, wherein the first level of inhalation flow parameter is substantially the same as the second level of inhalation flow parameter.

5. The inhalator according to claim 1, wherein the first level of inhalation flow parameter substantially differs from the second level of inhalation flow parameter.

6. The inhalator according to claim 1, wherein said valve (214) comprises a movable body (224) arranged in a passage (218), which passage is in fluid communication with the liquid container (30), the passage having a seat and the movable body and the seat having corresponding shapes as to form a sealing connection,

said mechanical actuating means comprises a body (228) rotationally arranged in said inhalator, the body comprises means (230, 262, 264) for urging said movable body against said seat, air flow directing means (206, 232, 234, 242) arranged to said body and said inhaler, arranged and designed such that, upon inhalation, a pressure difference is created over the flow directing means of said body (234), which pressure difference causes said body to rotate, thereby moving said urging means away from said movable body, and opening said valve means.

7. The inhalator according to claim 6, wherein the movable body of the valve comprises a magnetically affected material, and that said urging means comprises a magnet (230).

8. The inhalator according to claim 7, further comprising cam-shaped surfaces on which the rotationally arranged body rests, which cam-shaped surfaces transform the rotational movement of the body to a linear movement.

9. The inhalator according to claim 7, further comprising spring means (244) for urging the rotationally arranged body to its initial position after end of inhalation.

10. The inhalator according to claim 6, wherein said urging means comprises a holding member attached to said body and in contact with said movable body.

11. A breath actuated inhalator for aerosolizing and distributing a pressurised liquid, comprising:

a breath flow path defined between an air inlet and a mouthpiece outlet;

a container for the liquid;

an aerosolizing membrane for aerosolizing the liquid and introducing the aerosolized liquid into said breath flow path;

a valve controlling the introduction of the aerosolized liquid into said breath flow path, said valve being between said container and said aerosolizing membrane and allowing fluid communication between said container and said aerosolizing membrane;

a mechanical actuator regulating said valve and being energized by a flow of inhaled air;

wherein the valve means is a moveable sealing member for closing a conduit in communication with said container and comprising a first magnetic member and wherein said mechanical actuating actuator comprises a flexible membrane moveable in response to an air pressure created by the flow of inhaled air and a second magnetic member connected to said flexible membrane for moving therewith,

wherein said first and the second magnetic members are arranged in a repelling relationship to each other for urging said sealing member to close said conduit.