Patents by Inventor Thomas Rak

Thomas Rak 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: 4869102
    Abstract: A method and apparatus for providing a previously unattainable yet desirable function of monitoring, at a remote location and/or in a remote (non-intrusive) manner, the condition of a valve operator to signal a need for more thorough inspection and for possible maintenance of the valve or valve operator; the method and apparatus including the relating of output power (motor load) of the valve operator motor to the valve operator stem load, setting up a threshold value for the power parameter based on a maximum allowable operator thrust depletion; and periodically monitoring actual power parameter values at a remote location for comparison to the threshold value.
    Type: Grant
    Filed: September 3, 1987
    Date of Patent: September 26, 1989
    Assignee: Movats Incorporated
    Inventors: Stanley N. Hale, Thomas Rak, Duane H. Rowicki, Chin P. Ho