Patents by Inventor Herman L. Grant

Herman L. Grant 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).

  • Heat exchanger for pre-heating intake air for rotary dryer
    Patent number: 4279592
    Abstract: A pre-heating chamber of transversely arcuate shape adapted to be mounted above a longitudinal portion of a rotary dryer chamber adjacent the combustion chamber of a drying apparatus for drying aggregate, such as used in the manufacture of asphalt paving composition, in which ambient air is circulated through the pre-heating chamber and then discharged through a duct means to the air intake of the combustion chamber.The pre-heating chamber is preferably divided into a radially outer air intake passage communicating at one end with a radially inner air discharge passage to provide a more effective heat transfer between the pre-heating chamber and the rotary dryer chamber.
    Type: Grant
    Filed: January 2, 1980
    Date of Patent: July 21, 1981
    Assignee: Herman Grant Co., Inc.
    Inventor: Herman L. Grant