Static structures (e.g. – buildings) – Processes – Barrier construction
Reexamination Certificate
2000-12-13
2003-06-03
Friedman, Carl D. (Department: 3635)
Static structures (e.g., buildings)
Processes
Barrier construction
C052S504000, C052S603000, C052S604000
Reexamination Certificate
active
06571529
ABSTRACT:
The present invention relates to a retaining wall block that is resistant to damage and wear caused by the environment it is placed into. The deterioration resistant block is generally a hollowed frame or shell of a deterioration resistant material that is light-weight and is configured to accept and retain any type of filling material. The filling material provides weight and stability to the retaining wall block and also provides weight, stability and security to a retaining wall constructed of such blocks.
BACKGROUND OF THE INVENTION
The use of retaining walls to protect and beatify property in all types of environmental settings is a common practice in the landscaping, construction and environmental protection fields. Walls constructed from various materials are used to outline sections of property for particular uses, such as gardens or flower beds, fencing in property lines, reduction of erosion, and to simply beautify areas of a property.
Numerous methods and materials exist for the construction of retaining walls. Such methods include the use of natural stone, poured in place concrete, masonry, landscape timbers or railroad ties. In recent years, segmental concrete retaining wall units, sometimes known as keystones, which are dry stacked (i.e., built without the use of mortar), have become a widely accepted product for the construction of retaining walls. Examples of such units are described in U.S. Pat. No. RE 34,314 (Forsberg) and in U.S. Pat. No. 5,294,216 (Sievert).
However, many of the materials utilized in the construction of retaining walls are susceptible to deterioration and/or are not very aesthetically appealing. The ability of these retaining walls to withstand sunlight, wind, water, general erosion and other environmental elements is a problem with most retaining wall products.
A particular concern is the utilization of erosion protection materials in water shorelines. Leaving the shoreline natural can lead to erosion, cause an unmanageable and unusable shoreline, create high maintenance, and inhibit an aesthetically pleasing property. Many materials utilized in retention of shorelines are subject to immediate deterioration and/or are not as aesthetically appealing as one would desire. Furthermore, many materials utilized on shoreline structures are difficult to maintain due to the awkward location in the water and also the prevalent growth and presence of organic materials that can get caught and flourish in such a structure. For example, many lakeshore or ocean side properties utilize riprap as a retention device for prevention of erosion. Riprap is a configuration of large to medium size stones placed along the shoreline. A problem with waterfront properties that use a continuous wall of typical riprap is the shoreline will retain some organic material or will accumulate additional organic material brought in by the water. This usually leads to an unmanageable and aesthetically displeasing shoreline or higher maintenance. Furthermore, the riprap is never uniform in color and size and therefore does not as provide the most aesthetically pleasing shoreline or complete coverage of the shoreline. The lack of uniform shoreline coverage allows for some erosion, collection of various materials and the growth of weeds.
Another problem with materials normally utilized in the construction of retaining walls, such as poured in place concrete, masonry, landscape timbers, railroad ties or keystones is that regulations in most states and counties prohibit their use in or near bodies of water because of the crumbling or deterioration of the material into the body of water over time. Many of these retaining wall materials dissolve, crumble, break apart and/or float into the body of water for which they line causing problems with the shoreline and pollution of the water. For example, the average life of a concrete block or keystone in water is approximately a couple of years. A need exists for a retaining wall, which would be resistant to such deterioration.
An additional concern that exists in the construction of retaining walls is the weight of the materials. Concrete blocks, large stones, timbers or keystones can be heavy to move into the wall location and maneuver when constructing the wall. Many locations for which retaining walls are constructed are positioned in awkward terrain. Heavy building materials are difficult to move into the location and furthermore are difficult to position when constructing the retaining wall thereby adding additional cost and labor for installation. However, the heavy materials are needed once the wall is constructed to provide stability and security to the structure. Therefore, the easy to install light-weight units used for the construction of a retaining wall, which can be weighted once placed into position thus retaining the block in position and stabilizing the completed retaining wall, would be beneficial to construction of such structures.
SUMMARY OF THE INVENTION
As previously mentioned the present invention relates to a retaining wall block that is resistant to damage and wear caused by the environment it is placed into. The deterioration resistant block is generally a hollowed frame or shell of a deterioration resistant material that is light-weight and is configured to accept and retain any type of filling material. The filling material provides weight and stability to the retaining wall block and also ultimately provides stability and security to the retaining wall constructed of such blocks. More specifically, the deterioration resistant block comprises a top panel, a bottom panel, a wall assembly and an optional anchoring device. One or more chambers are created by adjoining the top panel, bottom panel and wall assembly. The chambers are adapted for receiving and retaining fill materials, such as sand, dirt, gravel, pea rock, or any other similar material, which provides the permanent weighting and stability of the retaining wall block.
Embodiments of the present invention are comprised of a deterioration resistant retaining block for use in constructing retaining walls on a number of property terrains, such as along waterfront properties. The deterioration resistant blocks are particularly useful for terrains near water or underwater due to their resistance to degradation. However, the deterioration resistant blocks could also be used for land applications for those that want a light-weight retaining wall block that can be filled on-site to add weight and stability and doesn't require heavy equipment for moving. Therefore, the deterioration resistant retaining wall block could be utilized to construct any form of wall or fence structure.
One unique feature of the present invention is the lightweight characteristic of the block before it is filled. As previously mentioned, embodiments of the present invention can be waterproof and may be filled with any type of fill material located at the site, such as rocks, sand, gravel, soil, pea rock or similar materials. The filling characteristic of the deterioration resistant block means that when the block is not filled it is very light-weight. The light-weight feature provides individuals constructing such walls the advantage of easily moving large numbers of the blocks to the site of construction with relative ease. Furthermore, the lightweight characteristic of the blocks allows for easy maneuvering of the blocks into final position when constructing the wall and still allows for the stability of a heavy block after it is filled. These characteristics are met by the block being made of a lightweight material and also configured to receive a heavy fill material once it is about to be placed or has been placed in its final position on the retaining wall.
Embodiments of the present invention further fills an unmet landscaping need for shorelines in that the deterioration resistant blocks are easily manufactured. Examples of possible manufacturing methods include but are not limited to injection-molding and blow-molding. Also any high volume application for production may b
Dolan John Fitzgerald
Knudson Edward Alan
Friedman Carl D.
New Technology Resources, Inc.
Thissell Jennifer I.
LandOfFree
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