Patents by Inventor Ruth L. Starr

Ruth L. Starr 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).

  • Vital signs monitor pumping system
    Patent number: 4958636
    Abstract: A pump supplies a variable pressure to an occluding cuff of a blood pressure monitor. This pump includes a pumping member that is driven through a stroke in response to a drive signal having a fixed frequency but a variable duty cycle such that the length of the stroke is variable in response to variations in the duty cycle. The drive signal is generated at a selected driving frequency which is outside of and greater than the measuring frequency range of the blood pressure monitor. In this way, strokes of the pump do not cause pressure variations in the cuff within the measuring frequency range.
    Type: Grant
    Filed: October 5, 1988
    Date of Patent: September 25, 1990
    Assignee: Criticare Systems, Inc.
    Inventors: Thomas Blandino, Ruth L. Starr