Patents by Inventor Darrell St Clair Townsend

Darrell St Clair Townsend 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).

  • Roll forming structural steel profiles with galvanised coating
    Patent number: 6042891
    Abstract: Structural steel profiles such as channels, having a material thickness greater than 2 mm, are roll-formed to a preform profile with corners partial bent, in-line galvanized, and then further roll-formed to final shape. The preform profile has upwardly facing convex surfaces allowing rapid shedding of excess galvanising material. By preforming corners before galvanising, surface elongation in the galvanising layer is minimized and cracking eliminated. This is enhances by constant length bending of corners over preform and final roll-forming operations.
    Type: Grant
    Filed: January 9, 1998
    Date of Patent: March 28, 2000
    Assignee: Tubemakers of Australia Limited
    Inventors: Brian Roy Crossingham, Andrew Robert Dickson, Rodney Matthew Langford, Douglas Ian Moore, Darrell St Clair Townsend