Patents by Inventor David Grant Middleton

David Grant Middleton 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).

  • Screening apparatus
    Patent number: 7364652
    Abstract: Screening apparatus (101,901) for use at an overflow weir (301, 902) in a sewerage system. The apparatus comprises a continuous moving screen band (201, 902) and a band cleaning mechanism (608). A first portion (801) of the screen band is configured to move along the weir towards one of its ends, and a second portion (803) of the screen band is configured to move along the weir towards its opposite end. A steeper portion (805) of the screen band extends to an elevated position (806) above the first and second portions, and the band cleaning mechanism is arranged to remove solid matter from the screen at said elevated position.
    Type: Grant
    Filed: March 3, 2004
    Date of Patent: April 29, 2008
    Assignee: Three Star Environmental Ltd.
    Inventor: David Grant Middleton
  • Screening apparatus
    Publication number: 20040262242
    Abstract: Screening apparatus (101,901) for use at an overflow weir (301, 902) in a sewerage system. The apparatus comprises a continuous moving screen band (201,902) and a band cleaning mechanism (608). A first portion (801) of the screen band is configured to move along the weir towards one of its ends, and a second portion (803) of the screen band is configured to move along the weir towards its opposite end. A steeper portion (805) of the screen band extends to an elevated position (806) above the first and second portions, and the band cleaning mechanism is arranged to remove solid matter from the screen at said elevated position.
    Type: Application
    Filed: March 3, 2004
    Publication date: December 30, 2004
    Inventor: David Grant Middleton