Patents by Inventor Charles N. Klettenberg

Charles N. Klettenberg 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).

  • System and method for manufacturing concrete blocks
    Patent number: 7695268
    Abstract: A system and method for manufacturing an uncured concrete block using the dry-cast manufacturing process includes a mold box having a pair of side walls, a pair of side plates, an open top side and an open bottom side defining a mold cavity. One or more end liners are disposed within the mold cavity and are selectively shiftable within the mold cavity with hydraulic cylinders between a first position and a second position. The end liners can be provided with a three-dimensional textured face to impart a decorative face to a side surface of the concrete block formed in the mold or can also provide blocks with a tapered face when disposed in the second position while the mold is filled with concrete. Before the block is stripped from the mold, the end liners are returned to the first position, so that the side surfaces are not damaged as the block is released.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: April 13, 2010
    Assignee: Marshall Concrete
    Inventor: Charles N. Klettenberg
  • System and method for manufacturing concrete blocks
    Publication number: 20080258340
    Abstract: A system and method for manufacturing an uncured concrete block using the dry-cast manufacturing process includes a mold box having a pair of side walls, a pair of side plates, an open top side and an open bottom side defining a mold cavity. One or more end liners are disposed within the mold cavity and are selectively shiftable within the mold cavity with hydraulic cylinders between a first position and a second position. The end liners can be provided with a three-dimensional textured face to impart a decorative face to a side surface of the concrete block formed in the mold or can also provide blocks with a tapered face when disposed in the second position while the mold is filled with concrete. Before the block is stripped from the mold, the end liners are returned to the first position, so that the side surfaces are not damaged as the block is released.
    Type: Application
    Filed: April 19, 2007
    Publication date: October 23, 2008
    Inventor: Charles N. Klettenberg
  • Method of making a composite masonry block
    Publication number: 20040218985
    Abstract: A concrete mixture may be introduced to a mold. A compression head compresses the concrete mixture in the mold and imparts a decorative front face on the block. The motion of the compression head also urges the mixture into a notched region of the mold cavity to form a protrusion on the block.
    Type: Application
    Filed: May 29, 2003
    Publication date: November 4, 2004
    Inventors: Charles N. Klettenberg, John H. F. Miller
  • Ornamental face for retaining wall block
    Patent number: D500864
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: January 11, 2005
    Assignee: Marshall Concrete Products, Inc.
    Inventors: Charles N. Klettenberg, John H. F. Miller