Patents by Inventor Douglas C. Layman

Douglas C. Layman 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: 5712795
    Abstract: A power management system automatically manages the power to operate a biomedical device, such as an infusion pump containing an internal battery. When external power is available, the management system operates the biomedical device from the external power and controls a recharger to maintain the battery at full charge. The power management system automatically calculates battery charge status and use and provides a run time display of the calculated amount of time that the battery can operate the biomedical device under current power requirements of the biomedical device. The power management system automatically updates the calculated charge status of the battery as well as the calculated capacity of the battery based on environmental factors and battery characteristics. The power management system automatically and periodically performs a deep discharge/recharge cycle to refresh the battery.
    Type: Grant
    Filed: October 2, 1995
    Date of Patent: January 27, 1998
    Assignee: Alaris Medical Systems, Inc.
    Inventors: Douglas C. Layman, Oliver J. Smith
  • Patent number: 4460355
    Abstract: Method and apparatus for detecting occlusions in a parenteral administration system of a type having a peristaltic pump for pumping a fluid through a feeding tube to a patient. A pressure transducer measures the cyclicly varying pressure of the fluid in the feeding tube and produces a corresponding pressure signal, and a comparator compares the pressure signal to a selected one of several thresholds, depending on the current stage of the pumping cycle. An occlusion alarm is actuated whenever the selected threshold is exceeded.
    Type: Grant
    Filed: June 11, 1982
    Date of Patent: July 17, 1984
    Assignee: IVAC Corporation
    Inventor: Douglas C. Layman