Patents Assigned to Keystone Retaining Wall Systems, Inc.
  • Patent number: 6709201
    Abstract: Connectors for use in a retaining wall and a retaining wall having grooved blocks configured to receive the connector. Connectors can be used in various orientations within the grooves of the blocks. In a retaining wall, a flexible geosynthetic material fits into a channel of a channel connector, and is held in place by an elongate bar. The connector prevents abrasion of geosynthetic material. The connector can also be a plurality of spaced-apart projections for use with an apertured, relatively rigid geogrid. The connectors hold geogrid firmly in place, providing for increased connection capacity.
    Type: Grant
    Filed: February 4, 2003
    Date of Patent: March 23, 2004
    Assignee: Keystone Retaining Wall Systems, Inc.
    Inventor: Robert J. Race
  • Patent number: 6637981
    Abstract: A retaining wall block system is described. The block system includes blocks of different sizes that are configured to be compatible with each other in the construction of a retaining wall or free-standing wall. Each block has at least three faces which are textured to produce the appearance of natural stone. The faces have varying sizes based on variations in width.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: October 28, 2003
    Assignee: Keystone Retaining Wall Systems, Inc.
    Inventor: Robert A. MacDonald
  • Patent number: 6615561
    Abstract: A retaining wall block is provided with a core, pin receiving cavities, and pin holes. The pin receiving cavities and pin holes are arranged on the block symmetrically on the block and substantially outside of block corner segments, thus resulting in a stronger block and permitting optimal alignment of the wall block cores when constructing a retaining wall. Retaining walls made using the block have increased strength.
    Type: Grant
    Filed: June 7, 2001
    Date of Patent: September 9, 2003
    Assignee: Keystone Retaining Wall Systems, Inc.
    Inventors: Robert A. MacDonald, Robert J. Race
  • Publication number: 20030118410
    Abstract: Connectors for use in a retaining wall and a retaining wall having grooved blocks configured to receive the connector. Connectors can be used in various orientations within the grooves of the blocks. In a retaining wall, a flexible geosynthetic material fits into a channel of a channel connector, and is held in place by an elongate bar. The connector prevents abrasion of geosynthetic material. The connector can also be a plurality of spaced-apart projections for use with an apertured, relatively rigid geogrid. The connectors hold geogrid firmly in place, providing for increased connection capacity.
    Type: Application
    Filed: February 4, 2003
    Publication date: June 26, 2003
    Applicant: Keystone Retaining Wall Systems, Inc.
    Inventor: Robert J. Race
  • Patent number: 6536994
    Abstract: Connectors for use in a retaining wall and a retaining wall having grooved blocks configured to receive the connector. Connectors can be used in various orientations within the grooves of the blocks. In a retaining wall, a flexible geosynthetic material fits into a channel of a channel connector, and is held in place by an elongate bar. The connector prevents abrasion of geosynthetic material. The connector can also be a plurality of spaced-apart projections for use with an apertured, relatively rigid geogrid. The connectors hold geogrid firmly in place, providing for increased connection capacity.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: March 25, 2003
    Assignee: Keystone Retaining Wall Systems, Inc.
    Inventor: Robert J. Race
  • Publication number: 20020192035
    Abstract: A retaining wall block system is described. The block system includes blocks of different sizes that are configured to be compatible with each other in the construction of a retaining wall or free-standing wall. Each block has at least three faces which are textured to produce the appearance of natural stone. The faces have varying sizes based on variations in width.
    Type: Application
    Filed: August 15, 2002
    Publication date: December 19, 2002
    Applicant: Keystone Retaining Wall Systems, Inc.
    Inventor: Robert A. MacDonald
  • Patent number: 6447213
    Abstract: A retaining wall block system is described. The block system includes blocks of different sizes that are configured to be compatible with each other in the construction of a retaining wall or free-standing wall. Each block has at least three faces which are textured to produce the appearance of natural stone. The faces have varying sizes based on variations in width.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: September 10, 2002
    Assignee: Keystone Retaining Wall Systems, Inc.
    Inventor: Robert A. MacDonald
  • Patent number: 6149352
    Abstract: A retaining wall block includes blocks of different sizes that are configured to be compatible with each other in the construction of a retaining wall or free-standing wall. Each block has at least three faces which are textured to produce the appearance of natural stone. The faces have varying sizes based on variations in width.
    Type: Grant
    Filed: February 11, 1999
    Date of Patent: November 21, 2000
    Assignee: Keystone Retaining Wall Systems, Inc.
    Inventor: Robert A. MacDonald
  • Patent number: 5913790
    Abstract: A plantable retaining wall block having a plant-receiving cavity located in a top surface thereof. The block is constructed so that the plant-receiving cavity lies between portions of side walls which are generally parallel with a front face of the block. The shape of the block is such that a nearly vertical retaining wall may be constructed such that each plant-receiving cavity is substantially exposed to allow vegetation to be planted. The wall block may include a connection member or an alignment member to allow the block to be stabilized and aligned with blocks in adjacent rows of a retaining wall.
    Type: Grant
    Filed: February 27, 1997
    Date of Patent: June 22, 1999
    Assignee: Keystone Retaining Wall Systems, Inc.
    Inventor: William B. Dawson
  • Patent number: 5865006
    Abstract: A retaining wall block and wall construction are disclosed. The retaining wall block is characterized in that it includes a removable flange having pin apertures which pass through the flange and into the body of the block. Such blocks allow the construction of walls having flange connections between adjacent courses of blocks or, when the flange is removed, pin connections between adjacent courses of blocks. The latter connection system is particularly well-suited for constructing walls that require soil reinforcement systems such as geogrids.
    Type: Grant
    Filed: June 2, 1997
    Date of Patent: February 2, 1999
    Assignee: Keystone Retaining Wall Systems, Inc.
    Inventor: William B. Dawson
  • Patent number: 5779391
    Abstract: A revetment block for use in a revetment system, the block having top and bottom surfaces and pairs of opposed and substantially parallel side surfaces. One of the side surfaces in each of the opposed pairs has first and second projections and the other of the side surfaces in each of the opposed pairs has first and second recesses. The projections and recesses are sized and configured so that they mate with projections and recesses on the side surfaces of adjacent blocks. The bottom surface of the block may be provided with projections to enhance the frictional stability of the blocks. The blocks are connected together by cables which pass through tunnels between the side surfaces of the blocks. A sleeve fitted into each opening of the tunnel in the side surface is provided to protect the cables from breakage.
    Type: Grant
    Filed: November 19, 1996
    Date of Patent: July 14, 1998
    Assignee: Keystone Retaining Wall Systems, Inc,
    Inventor: David W. Knight
  • Patent number: 5771631
    Abstract: The invention includes a block for use in landscaping and other applications. The block may have a lip on one or both sides that may function as a mowing strip. The block may have grooves on the bottom for receiving an anchoring strip or defining a conduit. Also, one or both ends of the block may be angled to create a straight, curved, or curvilinear border.
    Type: Grant
    Filed: October 29, 1996
    Date of Patent: June 30, 1998
    Assignee: Keystone Retaining Wall Systems, Inc.
    Inventor: William B. Dawson
  • Patent number: D479342
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: September 2, 2003
    Assignee: Keystone Retaining Wall Systems, Inc.
    Inventor: William B. Dawson
  • Patent number: D488242
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: April 6, 2004
    Assignee: Keystone Retaining Wall Systems, Inc.
    Inventor: Robert A. MacDonald
  • Patent number: D381086
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: July 15, 1997
    Assignee: Keystone Retaining Wall Systems, Inc.
    Inventor: Paul J. Forsberg
  • Patent number: D384168
    Type: Grant
    Filed: October 23, 1995
    Date of Patent: September 23, 1997
    Assignee: Keystone Retaining Wall & Systems, Inc.
    Inventor: J. Michael Stevenson
  • Patent number: D387434
    Type: Grant
    Filed: January 3, 1996
    Date of Patent: December 9, 1997
    Assignee: Keystone Retaining Wall Systems, Inc.
    Inventor: William B. Dawson
  • Patent number: D397230
    Type: Grant
    Filed: October 22, 1996
    Date of Patent: August 18, 1998
    Assignee: Keystone Retaining Wall Systems, Inc.
    Inventor: Paul J. Forsberg
  • Patent number: D397451
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: August 25, 1998
    Assignee: Keystone Retaining Wall Systems, Inc.
    Inventor: J. Michael Stevenson
  • Patent number: D397808
    Type: Grant
    Filed: July 25, 1995
    Date of Patent: September 1, 1998
    Assignee: Keystone Retaining Wall Systems, Inc.
    Inventor: William B. Dawson