Patents by Inventor Dan E. Warkander

Dan E. Warkander 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).

  • Patent number: 7654262
    Abstract: The system of the present invention reduces hydrostatic imbalances acting on the diaphragm of a diver's open-circuit breathing apparatus' regulator. In general, the system applies a flexing force to the diaphragm based on the position of the diver's head relative to gravity when the mouthpiece is in the diver's mouth. The system can be realized by a simple mechanical pendulum assembly attached to the regulator.
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: February 2, 2010
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Dan E. Warkander
  • Patent number: 6165105
    Abstract: Apparatus for exercising the muscles of the respiratory system for improving endurance. The apparatus includes a bag which is inflatable for receiving a predetermined volume of expired air. A valve is closed during rebreathing of expired air in the bag and is adapted to open in response to deflation of the bag to admit fresh air to the air way. The valve is also adapted to open when the bag is fully inflated to release excess expired air. The breathing frequency is paced so that, in combination with the predetermined volume, the overall ventilation may be maintained over a period of time for increasing endurance. As endurance is increased over time, the bag may be replaced with incrementally larger volume bags or the bag volume may be incrementally increased. Guidance of the training schedule and central monitoring of the training are also provided.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: December 26, 2000
    Inventors: Urs Boutellier, Clas E. G. Lundgren, Dan E. Warkander