Patents by Inventor James F. Guthrie

James F. Guthrie 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).

  • Turbine flowmeter
    Patent number: 4134298
    Abstract: A turbine wheel is insertable in a line to intercept fluid flowing therethrough. A pickup coil senses the rotation of the turbine wheel. Responsive to the pickup coil, the speed of rotation of the turbine wheel is reduced when it exceeds a predetermined safe limit. Preferably, the speed reduction is accomplished by turning the turbine wheel 90.degree. to the direction of fluid flow.
    Type: Grant
    Filed: May 25, 1977
    Date of Patent: January 16, 1979
    Assignee: Flow Technology, Inc.
    Inventor: James F. Guthrie
  • Turbine flowmeter
    Patent number: 4111043
    Abstract: A turbine wheel is insertable in a line to intercept fluid flowing therethrough. A pickup coil senses the rotation of the turbine wheel. Responsive to the pickup coil when the rotational speed of the turbine wheel exceeds a predetermined safe limit, it is reduced to zero by closure of a gate that prevents further fluid flow through the passage in which the turbine wheel resides. Preferably, the gate comprises a sleeve that covers the housing in which the turbine wheel resides. In one embodiment, two turbine wheels having different rotational characteristics responsive to fluid flow are alternately gated open and closed, depending upon the fluid velocity.
    Type: Grant
    Filed: May 25, 1977
    Date of Patent: September 5, 1978
    Assignee: Flow Technology, Inc.
    Inventors: James F. Guthrie, Richard E. Zimmerman