Patents by Inventor Curtis W. Shillingburg

Curtis W. Shillingburg 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: 8371086
    Abstract: A modular wall block is adapted for being assembled together with a number of other blocks in stacked courses to form a retaining wall. The wall block has a front and rear, top and bottom, and opposing sides. The top and bottom define respective substantially planar stacking surfaces. A shear lug projects from one of the planar stacking surfaces of the top and bottom. A block-locating jut is formed with at least one of the opposing sides, and projects from the side at a point intermediate the top and bottom towards one of the planar stacking surfaces. The block-locating jut defines a base surface substantially coplaner with the stacking surface, and a lug-engaging shoulder adapted for engaging a shear lug of a wall block located in an adjacent stacked course.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: February 12, 2013
    Assignee: RidgeRock Retaining Walls, Inc.
    Inventor: Curtis W. Shillingburg
  • Patent number: 8141315
    Abstract: A modular wall block is adapted for being assembled together with a number of other blocks in stacked courses to form a retaining wall. The wall block has a front and rear, top and bottom, and opposing sides. The top and bottom define respective substantially planar stacking surfaces. A shear lug projects from one of the planar stacking surfaces of the top and bottom. A block-locating jut is formed with at least one of the opposing sides, and projects from the side at a point intermediate the top and bottom towards one of the planar stacking surfaces. The block-locating jut defines a base surface substantially coplaner with the stacking surface, and a lug-engaging shoulder adapted for engaging a shear lug of a wall block located in an adjacent stacked course.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: March 27, 2012
    Assignee: Ridgerock Retaining Walls, Inc.
    Inventor: Curtis W. Shillingburg
  • Patent number: 6701687
    Abstract: A modular wall block is adapted for being assembled together with a number of other blocks in stacked courses to form a retaining wall. The wall block has a front and rear, top and bottom, and opposing sides. At least one of the opposing sides defines a generally L-shaped vertical slot. A course connector is received in the vertical slot, and includes first and second ends joined together by a setback spacer. The first end extends in an x-direction and a y-direction, and defines a generally L-shaped structure received in the L-shaped slot and restricting forward, rearward, and outward movement of the course connector. The second end of the course connector extends outwardly in a z-direction beyond one of the top and bottom of the wall block to engage one of the number of other blocks in an upper or lower course.
    Type: Grant
    Filed: May 8, 2003
    Date of Patent: March 9, 2004
    Assignee: Ridgerock Retaining Walls Inc.
    Inventor: Curtis W. Shillingburg
  • Patent number: 6622445
    Abstract: A modular wall block is adapted for being assembled together with a number of like blocks in stacked courses to form a retaining wall. The wall block includes a front and rear, top and bottom, and opposing sides. A generally J-shaped anchor has a connecting end and an anchoring end integrally joined by a setback spacer. The connecting end is adapted for being inserted into the wall block to secure the anchor to the block. The anchoring end extends outwardly from one of the top and bottom of the wall block to engage one of the number of like blocks in an upper or lower course. The spacer locates the anchoring end a spaced distance from the rear of the block. The anchor secures the block in the retaining wall at a predetermined setback relative to like blocks in the upper or lower course.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: September 23, 2003
    Assignee: Ridgerock Retaining Walls, Inc.
    Inventors: Curtis W. Shillingburg, James S. Martin
  • Patent number: 6474036
    Abstract: A (modular wall block is adapted for being assembled together with a number of like blocks in stacked courses to form a retaining wall. The wall block includes a front face and rear, top and bottom, and opposing sides. A locking shear key extends outwardly from either of the top or bottom of the wall block, and is adapted for residing between respective adjacent sides of like blocks in an adjacent upper or lower course to anchor the wall block in position. A severable area is formed with the shear key for being removed to accommodate placement and orientation of the wall block between respective adjacent sides of like blocks in an adjacent upper or lower course.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: November 5, 2002
    Inventors: James S. Martin, Curtis W. Shillingburg
  • Publication number: 20010004822
    Abstract: A modular wall block is adapted for being assembled together with a number of like blocks in stacked courses to form a retaining wall. The wall block includes a front face and rear, top and bottom, and opposing sides. A locking shear key extends outwardly from either of the top or bottom of the wall block, and is adapted for residing between respective adjacent sides of like blocks in an adjacent upper or lower course to anchor the wall block in position. A severable area is formed with the shear key for being removed to accommodate placement and orientation of the wall block between respective adjacent sides of like blocks in an adjacent upper or lower course.
    Type: Application
    Filed: December 29, 2000
    Publication date: June 28, 2001
    Inventors: James S. Martin, Curtis W. Shillingburg
  • Patent number: 6168354
    Abstract: A modular wall block is adapted for being assembled together with a number of like blocks in stacked courses to form a retaining wall. The wall block includes a front face and rear, top and bottom, and opposing sides. A locking shear key extends outwardly from either of the top or bottom of the wall block, and is adapted for residing between respective adjacent sides of like blocks in an adjacent upper or lower course to anchor the wall block in position. A severable area is formed with the shear key for being removed to accommodate placement and orientation of the wall block between respective adjacent sides of like blocks in an adjacent upper or lower course.
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: January 2, 2001
    Inventors: James S. Martin, Curtis W. Shillingburg
  • Patent number: D508739
    Type: Grant
    Filed: September 24, 2004
    Date of Patent: August 23, 2005
    Inventor: Curtis W. Shillingburg
  • Patent number: D509911
    Type: Grant
    Filed: September 24, 2004
    Date of Patent: September 20, 2005
    Inventor: Curtis W. Shillingburg
  • Patent number: D405543
    Type: Grant
    Filed: October 16, 1997
    Date of Patent: February 9, 1999
    Inventor: Curtis W. Shillingburg