Patents by Inventor Philip Worrall

Philip Worrall 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).

  • Crawler track shoe with multiple roller paths and multiple drive lugs
    Patent number: 7530650
    Abstract: A shoe (10) for a crawler track has two roller paths (16, 17) thereon, upon which a dual rim roller travels in use. The roller paths (16, 17) are aligned with leading and trailing lugs (11, 12) respectively, of the shoe 10. Drive lugs (18, 19) are provided on the outside of the roller paths (16, 17). In use, the drive lugs (18, 19) are engaged by sprocket teeth to drive the crawler track. The drive lugs (18, 19) stand proud of the roller paths (16, 17), but may also be recessed below the roller paths.
    Type: Grant
    Filed: July 5, 2002
    Date of Patent: May 12, 2009
    Inventors: Keith Hannan, Philip Worrall
  • Crawler track shoe with multiple roller paths and multiple drive lugs
    Publication number: 20040178676
    Abstract: A shoe (10) for a crawler track has two roller paths (16, 17) thereon, upon which a dual rim roller travels in use. The roller paths (16, 17) are aligned with leading and trailing lugs (11, 12) respectively, of the shoe 10. Drive lugs (18, 19) are provided on the outside of the roller paths (16, 17). In use, the drive lugs (18, 19) are engaged by sprocket teeth to drive the crawler track. The drive lugs (18, 19) stand proud of the roller paths (16, 17), but may also be recessed below the roller paths.
    Type: Application
    Filed: January 2, 2004
    Publication date: September 16, 2004
    Inventors: Keith Hannan, Philip Worrall
  • Track shoe
    Patent number: 6543863
    Abstract: A track shoe for a crawler track has a hollow body with top and bottom sections and perimeter side walls defining a void therebetween. A supporting pillar is located in the void and extends between the top and bottom sections. The pillar is located in the main loadbearing region of the shoe and bears most of the load on the shoe. This enables the thickness of the side walls to be minimized. The shoe can be manufactured more efficiently by complementing foundry methods.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: April 8, 2003
    Assignee: The ANI Corporation Limited
    Inventors: Keith Hannan, Philip Worrall, Steven Hall