Patents by Inventor Duncan James Rumbold

Duncan James Rumbold 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).

  • Conduit overheating detection system
    Patent number: 7140367
    Abstract: This invention relates to respiratory humidifiers and heated breathing conduits used to couple a patient to the humidifier. A conduit overheating detection system for a conduit having heating wire or element is disclosed. The overheating detection system may be utilized with a in a single limb conduit system or dual limb system. In each of these systems the conduit overheating detection system monitors the current in the heating element(s) and alters the power to the heating element(s) to prevent the occurrence the heating element(s) and/or conduit from overheating.
    Type: Grant
    Filed: February 18, 2003
    Date of Patent: November 28, 2006
    Assignee: Fisher & Paykel Healtcare Limited
    Inventors: Craig Karl White, Duncan James Rumbold
  • Conduit overheating detection system
    Publication number: 20030154977
    Abstract: This invention relates to respiratory humidifiers and heated breathing conduits used to couple a patient to the humidifier. A conduit overheating detection system for a conduit having heating wire or element is disclosed. The overheating detection system may be utilised with a in a single limb conduit system or dual limb system. In each of these systems the conduit overheating detection system monitors the current in the heating element(s) and alters the power to the heating element(s) to prevent the occurrence the heating element(s) and/or conduit from overheating.
    Type: Application
    Filed: February 18, 2003
    Publication date: August 21, 2003
    Inventors: Craig Karl White, Duncan James Rumbold