Patents by Inventor Larry E. Hubbard

Larry E. Hubbard 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).

  • Bearing failure indicator for rotating electric machines
    Patent number: 4379291
    Abstract: In a squirrel cage type of induction motor, conductive strips insulated from the stator are circularly spaced, ninety degrees apart, and project 0.003 inches into the rotor-to-stator clearance space. Upon excessive lateral rotor movement, it contacts a strip, closing a low voltage circuit triggering an alarm and de-energizing the motor. A reset button must be pressed to enable starting the motor.
    Type: Grant
    Filed: September 4, 1979
    Date of Patent: April 5, 1983
    Assignee: Texas Eastern Scientific Research, Inc.
    Inventors: Larry E. Hubbard, Clifford A. Rhorer