Patents by Inventor Joseph C. Blum

Joseph C. Blum 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: 8162246
    Abstract: A displaceable drive ball safety element type torque limiter is installed in a variable speed AC motor drive crusher mill drive which can include a selective operable locking brake to hold the crusher components stationary during maintenance operations.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: April 24, 2012
    Inventors: Randall Long, Joseph C. Blum, Thomas F. Long, Mark W. Rudolph
  • Patent number: RE45889
    Abstract: A displaceable drive ball safety element type torque limiter is installed in a variable speed AC motor drive crusher mill drive which can include a selective operable locking brake to hold the crusher components stationary during maintenance operations.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: February 16, 2016
    Inventors: Randall Long, Joseph C. Blum, Thomas F. Long, Jr., Mark Wayne Rudolph