Apparatus for delivery of pressurised gas

• US 8,985,105 B2
• Filed: 10/16/2006
• Issued: 03/24/2015
• Est. Priority Date: 10/21/2005
• Status: Active Grant

• Current Assignee: Compumedics Medical Innovation Pty Limited
• Original Assignee: Compumedics Medical Innovation Pty Limited
• Inventors: Burton, David, Wallace, Allan, Blochlinger, Fred, Freeman, Warwick, Parratt, Grant
• Primary Examiner(s): Anderson, Lynne
• Assistant Examiner(s): PHILIPS, BRADLEY H
• Application Number:
  US12/091,060
• Publication Number:
  US 20090301482A1
• Time in Patent Office: 3,081 Days
• Field of Search: 128/200.24, 128/203.12, 128/203.16, 128/203.17, 128/203.26, 128/204.18, 128/204.21, 128/204.23, 417/22, 417/45, 416/44, 318/768, 318/721, 31840037-4004, 31840032-40036
• US Class Current: 128/204.21
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 16/0069 the speed thereof being controlled by respiratory parameters, e.g. by inhalation
• CPC Class Codes: A61M 16/024 including calculation means, e.g. using a processor
• CPC Class Codes: A61M 16/0816 Joints or connectors
• CPC Class Codes: A61M 16/10 Preparation of respiratory gases or vapours
• CPC Class Codes: A61M 16/107 in the inspiratory path
• CPC Class Codes: A61M 16/1075 by influencing the temperature A61M16/1045 takes precedence
• CPC Class Codes: A61M 16/109 the humidifying liquid or the beneficial agent
• CPC Class Codes: A61M 16/16 Devices to humidify the respiration air A61M16/1045 takes precedence
• CPC Class Codes: A61M 16/161 with means for measuring the humidity
• CPC Class Codes: A61M 2016/0027 pressure meter
• CPC Class Codes: A61M 2016/0039 in the inspiratory circuit
• CPC Class Codes: A61M 2205/42 Reducing noise
• CPC Class Codes: A61M 2205/505 Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
• CPC Class Codes: A61M 2209/086 Docking stations

Abstract

The present invention provides a gas delivery device and system and methods for delivering humidified pressurized gas through a conduit to a subject. The configuration of the elements of the gas delivery device enable the device to be conveniently oriented from a horizontal to vertical position to suit the needs of a user. The gas delivery device may incorporate a Helmholtz resonator for dampening sound of the motor. The conduit may incorporate concentric tubes to allow it to conveniently engage the humidifier at a single aperture. The invention includes a method of operating a blower motor for a gas delivery device using a single Hall sensor.

Claims

1. A method for controlling a motor of a blower in a gas delivery device, the method being performed by a microcontroller to include the steps of:

determining a rotational position of an impeller connected to a rotor at a plurality of locations in a rotation of the impeller using a single rotor position sensor which generates rotor position data, wherein the rotor position data is normalized for determining a rotation period of the rotor,

determining a velocity of the impeller, and

adjusting a timing of winding excitations for controlling a speed of the impeller.

2. A method for delivering breathable gas to a subject, the method including the steps of:

pressurising ambient gas with an impeller connected to a rotor,

humidifying the ambient gas; and

directing the humidified gas to an airway of a subject;

wherein the pressurising step include as performed by a microcontroller, controlling a rotation of the impeller from rotor position data detected by detecting a position of the impeller at a plurality of locations in a rotation of the impeller with a single rotor position sensor, wherein the rotor position data is normalized for determining a rotation period of the rotor.

3. The method of claim 2 wherein the single rotor position sensor is a Hall effect sensor.