Patents Assigned to Reid Construction Systems Pty Limited
  • Screws and threadforms
    Patent number: 6371709
    Abstract: A screw thread having a threadform including a ridge rising from root to crest with the crest having two peaks, separated by a trough the depth of which is less than the height of the ridge from root to crest. It has particular use as a screw for timber, and is especially suited to fixing railway rails to sleepers.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: April 16, 2002
    Assignees: Hanstock Fasteners Pty Limited, Reid Construction Systems Pty Limited
    Inventors: Fotios Papafotiou, David Ian Kershaw