Patents by Inventor Douglas C. Haisch

Douglas C. Haisch 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).

  • Patent number: 5819494
    Abstract: A truss connector utilizing a first relatively flexible plate which has a first side and an opposite second side. A plurality of teeth extend from the second side of the first relatively flexible plate and are capable of penetrating the truss, which may be composed of softer material such as wood and the like. The second relatively rigid plate is fixed to the flexible plate such that the first side of the rigid plate contacts the second side of the flexible plate to form a unit. Apertures pass through the connected first and second plates to accept fasteners which bear on the relatively rigid plate and are capable of passing through the truss. Pairs of connectors may be employed in a truss assembly.
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: October 13, 1998
    Inventor: Douglas C. Haisch
  • Patent number: 5649403
    Abstract: A truss structure utilizing three open channeled rigid members or chords which are preferably made of metallic material. A web constructed of at least two spanning members that are angularly attached to one another, are connected to the first, second, and third channel members. First and second open channel members are each connected to one another at one end and to the third rigid open channel member at the other end to form a triangular structure with the web portion in between. Structural elements are connected to the web and are capable of lying within the open channel members to permit interlinkage between the web and the chords to complete the truss structure.
    Type: Grant
    Filed: January 4, 1995
    Date of Patent: July 22, 1997
    Inventor: Douglas C. Haisch
  • Patent number: 5622022
    Abstract: An architectural truss having a connector utilizing first, second, third, and fourth plate structures which lie adjacent three chords. The first plate structure engages an outer first chord while the second plate structure engages the outer first chord and a central second chord. A third plate structure engages the central second chord and a third outer chord. A fourth plate structure engages the third outer chord. Each plate structure resists movement relative to an adjacent chord under shear stress. An interconnecting member engages and holds each of the plate structures. The central second chord may extend outwardly from the first and third chords at an angle to form a corner of a triangular structure constituting a portion of a truss.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: April 22, 1997
    Inventor: Douglas C. Haisch