Patents by Inventor Walter T. Grainger

Walter T. Grainger 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: 5758832
    Abstract: An apparatus and method for recycling glass waste comprising glass and non-glass materials. The apparatus has a device for receiving and presizing the glass waste to produce presized glass waste. A first conveyor receives the presized glass waste and transfers it to a storage hopper. The presized glass waste is then transported to an impact mill via a second conveyor. The rate of movement of the second conveyor is regulated by a control device located within the impact mill. In the impact mill, the glass component of the glass waste is beat off the non-glass component of the glass waste to produce a pulverized mixture. The pulverized mixture is then sent to a screening device via a third conveyor. In the screening device, the glass and non-glass material are separated from the pulverized mixture and collected for reuse.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: June 2, 1998
    Assignee: Grainger Associates
    Inventor: Walter T. Grainger