Patents by Inventor Carl W. Pfeil

Carl W. Pfeil 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).

  • DRAGHEAD SYSTEM FOR USE IN DREDGING OR THE LIKE
    Publication number: 20140250742
    Abstract: A draghead visor is configured to attach to an armature along a rotation axis. A biasing assembly attached to the draghead visor is configured for attachment to the armature such that the biasing assembly is positioned to apply a force on the visor in a manner such that a rotational force is applied to the visor around the rotation axis. The biasing assembly may include one or more spring subassemblies, wherein a spring subassembly may include one or more compression spring, extension spring, or torsion spring. The draghead visor may be part of a draghead pulled by a marine vessel.
    Type: Application
    Filed: March 11, 2013
    Publication date: September 11, 2014
    Applicant: GREAT LAKES DREDGE & DOCK COMPANY, LLC
    Inventors: Paul C. LaMourie, Carl W. Pfeil