Patents Assigned to Benboid Pty Ltd.
  • Ladder means and method of production
    Patent number: 4655320
    Abstract: A ladder comprises a pair of spaced stiles, each having a channel shaped cross-section with the flanges of each stile directed towards those of the other, and a plurality of rungs interconnecting the stiles, each rung also being of general channel section, the tread portion of the rung defining an acute angle with one flange and an obtuse angle with the other flange, and weld beads joining the outer surface of the acute angled rung with one flange of each stile and the inner surface of the obtuse angle rung with the web of each stile.
    Type: Grant
    Filed: December 10, 1985
    Date of Patent: April 7, 1987
    Assignee: Benboid Pty Ltd.
    Inventor: John C. Good