Patents by Inventor Leslie C. Knopp

Leslie C. Knopp 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).

  • Apparatus and apparatus for mixing and cooling molding sand
    Patent number: 5330265
    Abstract: A process using an improved apparatus for mixing and cooling molding sand.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: July 19, 1994
    Assignee: Hartley Controls Corporation
    Inventors: James P. Keating, Jr., Leslie C. Knopp
  • Automatic bond determinator
    Patent number: 4930354
    Abstract: A device for testing the quality of foundry green sand is described including a delivery structure with an invertible riddle, a testing structure with a compaction plunger, and sensors for measuring the compaction and moisture content of the sample, another testing structure with a sensor for measuring the green compressive strength of the sample, and a specimen tube mounted on carriage which traverses between delivery and testing structures. A strike off device levels the sample within the specimen tube. The floor of the specimen tube can be raised to eject the sample after testing and the same strike off device cleans the raised floor. A control panel activates and coordinates the operation of the device. A data processor analyzes the information yielded by the testing apparatus and automatically initiates the correct addition of any additives as needed.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: June 5, 1990
    Assignee: Hartley Controls Corporation
    Inventors: Leslie C. Knopp, Kenneth M. Baumgartle