Patents by Inventor Gerrit Martinus Hertgers

Gerrit Martinus Hertgers 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).

  • Positioning a sinking tunnel section
    Patent number: 8496406
    Abstract: A positioning apparatus includes a frame and two substantially vertically extending legs. The frame includes a suspension device adapted to suspend a sinking tunnel section. The legs include upper ends connected by a substantially horizontally extending beam and lower ends vertically movable relative to the sinking tunnel section. The legs include clamping members for engaging opposite transverse sides of the tunnel section that are settable substantially in a plane defined by the legs and beam of the frame. The frame is devised for extending with its legs outwardly of the two opposite transverse sides of the tunnel section and extending with the beam above a roof of the tunnel section.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: July 30, 2013
    Assignee: Strukton Civiel Projecten B.V.
    Inventor: Gerrit Martinus Hertgers
  • POSITIONING A SINKING TUNNEL SECTION
    Publication number: 20100310318
    Abstract: A positioning apparatus includes a frame and two substantially vertically extending legs. The frame includes a suspension device adapted to suspend a sinking tunnel section. The legs include upper ends connected by a substantially horizontally extending beam and lower ends vertically movable relative to the sinking tunnel section. The legs include clamping members for engaging opposite transverse sides of the tunnel section that are settable substantially in a plane defined by the legs and beam of the frame. The frame is devised for extending with its legs outwardly of the two opposite transverse sides of the tunnel section and extending with the beam above a roof of the tunnel section.
    Type: Application
    Filed: December 20, 2007
    Publication date: December 9, 2010
    Applicants: STRUKTON CIVIEL PROJECTEN B.V., DAEWOO ENGINEERING & CONSTRUCTION CO., LTD.
    Inventor: Gerrit Martinus Hertgers