Patents by Inventor Andrew D. Craghan

Andrew D. Craghan 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 for screeding
    Patent number: 6719486
    Abstract: A screed where the installation is laid out with hollow ended pointed rods. The rods have markings on them to indicate the proper excavation depth for application s such as patio/walkway or d driveway. A grade pin or a jackhammer pin is inserted into the hollow ends of each rod to vertically position the rods to the proper elevation determined by surveying techniques. The pins are then replaced with U shaped rail supports. Rails are then inserted between supports. A screed board notched to ride on each rail is then used to smooth the surface of sub-base materials.
    Type: Grant
    Filed: August 8, 2002
    Date of Patent: April 13, 2004
    Inventor: Andrew D. Craghan
  • APPARATUS FOR SCREEDING
    Publication number: 20040028473
    Abstract: A screed where the installation is laid out with hollow ended pointed rods. The rods have markings on them to indicate the proper excavation depth for application s such as patio/walkway or d driveway. A grade pin or a jackhammer pin is inserted into the hollow ends of each rod to vertically position the rods to the proper elevation determined by surveying techniques. The pins are then replaced with U shaped rail supports. Rails are then inserted between supports. A screed board notched to ride on each rail is then used to smooth the surface of sub-base materials.
    Type: Application
    Filed: August 8, 2002
    Publication date: February 12, 2004
    Inventor: Andrew D. Craghan