Patents by Inventor William J. Rotariu

William J. Rotariu 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: 4971049
    Abstract: A flow control device for supplying oxygen to a medical patient using provides pulses of oxygen only when the patient inhales, using a flow valve unit that receives a pressurized oxygen supply and delivers a controlled oxygen supply output through a cannula to a patient. A pressure sensor detects breathing changes and output signals that are amplified and automatically corrected for signal errors, such as those caused by offset voltage and temperature drift, by use of a negative integral feedback module that includes automatic correction circuits and a switch for selectively disconnecting the feedback. The amplified sensor signal generates control signals, including an output pulse delivered to the flow valve, having a pulse width that is a user adjustable for control of the opening and closing of a valve, such as a three-way solenoid valve, for outputting time selectable pulses of oxygen to the patient when patient inhalation is detected by the pressure sensor.
    Type: Grant
    Filed: November 6, 1989
    Date of Patent: November 20, 1990
    Assignee: Pulsair, Inc.
    Inventors: William J. Rotariu, Darold Wobschall
  • Patent number: D322480
    Type: Grant
    Filed: May 18, 1989
    Date of Patent: December 17, 1991
    Assignee: Pulsair Anstalt
    Inventor: William J. Rotariu