Patents Assigned to Heras Holding Company B.V.
  • Gate
    Patent number: 4610109
    Abstract: A gate for closing a passage comprising a support post and a gate hingedly mounted on the post, said gate comprising a horizontal girder supporting spaced vertically extending spikes, the means extending longitudinally through the girder, passing through all of the spikes, secured to opposite ends of the girder and subsequently tensioned thereby exerting sufficient compression in the girder to resist bending thereof and normally preventing the spikes from engaging the ground surface.
    Type: Grant
    Filed: May 29, 1984
    Date of Patent: September 9, 1986
    Assignee: Heras Holding Company B.V.
    Inventor: Franciscus B. M. Ruigrok