Patents by Inventor Craig Jonathan Madden

Craig Jonathan Madden has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Flexible valve for administering constant flow rates of medicine from a nebulizer
    Patent number: 6070573
    Abstract: A nebulizer is improved by placing a flexible valve in the ambient air inlet tube. Inhalation suction and Venturi effect shut down the flexible valve in proportion to the strength of the inhalation. Thus, the same output flow rate is obtained even with variable strength inhalations. Medications can be properly administered by controlled inhalation flow rates.
    Type: Grant
    Filed: March 27, 1997
    Date of Patent: June 6, 2000
    Inventors: Harvey James Howe, Craig Jonathan Madden, Richard Raphael Rosenthal
  • Flexible valve for administering constant flow rates of medicine from a nebulizer
    Patent number: 5655520
    Abstract: A nebulizer is improved by placing a flexible valve in the ambient air inlet tube. Inhalation suction and Venturi effect shut down the flexible valve in proportion to the strength of the inhalation. Thus, the same output flow rate is obtained even with variable strength inhalations. Medications can be properly administered by controlled inhalation flow rates. In an alternate embodiment a metered dose inhaler (MDI) is outfitted with a similar flexible valve. Once again the patient is forced to inhale at a constant flow rate, thus causing the medication to seep deeply into the lungs. In both embodiments the flexible valve is preferably shaped in a duck billed fashion with air flow flowing toward the narrow end of the duck bill.
    Type: Grant
    Filed: August 23, 1993
    Date of Patent: August 12, 1997
    Inventors: Harvey James Howe, Craig Jonathan Madden, Richard Raphzel Rosenthal