Patents by Inventor Douglas R. Leithauser

Douglas R. Leithauser 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).

  • Oxygen-delivery system with portable oxygen meter
    Patent number: 6394088
    Abstract: An oxygen-delivery system comprises a portable oxygen meter including a low-pressure oxygen inlet, a low-pressure oxygen outlet, and an exhale-inhale sensing port, an oxygen-supply source including a discharge outlet and configured to discharge low-pressure oxygen through the discharge outlet, a flexible supply tube arranged to conduct low-pressure oxygen from the oxygen-supply source into the portable oxygen meter through the low-pressure oxygen inlet, and a nasal cannula coupled to the low-pressure oxygen outlet and the exhale-inhale sensing port.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: May 28, 2002
    Inventors: Mark R. Frye, J. Fred Brown, Douglas R. Leithauser
  • Oxygen-conserving regulator assembly
    Patent number: 6116242
    Abstract: An apparatus is provided for controlling discharge of oxygen from an oxygen supply source to a patient. The apparatus includes an oxygen supply inlet, a pressure regulator coupled to the oxygen supply inlet and configured to reduce pressure of oxygen received from the oxygen supply inlet to a selected magnitude, a flow controller coupled to the pressure regulator and configured to meter oxygen received from the pressure regulator at a selected flow rate, and an oxygen distribution assembly including a pneumatic demand oxygen valve and a conduit conducting oxygen discharged from the flow controller through the pressure regulator to the pneumatic demand oxygen valve for delivery to a patient. The flow controller includes a chamber and a rotary valve for splitting oxygen discharged from the chamber into a first stream in an oxygen supply passageway for use by a patient and a second stream in a diaphragm supply passageway for controlling operation of pneumatic demand oxygen valve.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: September 12, 2000
    Assignee: Nellcor Puritan Bennett Incorporated
    Inventors: Mark R. Frye, John R. Grenaway, Richard A. Davis, Douglas R. Leithauser
  • Neck tube closure assembly for cryogenic containers
    Patent number: 4411138
    Abstract: A double walled nonpressurized cryogenic storage container having an elongated neck tube in combination with a closure assembly for the neck tube. The closure assembly includes a neck plug and a neck tube adapter having access means for sensor and fill lines. The neck tube adapter has an outer shell and an inner shell with a multiplicity of radially projecting spacer elements for establishing an annular space between the outer shell and the neck tube. The inner shell is preferably eccentric to the outer shell.
    Type: Grant
    Filed: August 17, 1982
    Date of Patent: October 25, 1983
    Assignee: Union Carbide Corporation
    Inventors: Douglas R. Leithauser, John K. Young