Fence System and Method of Use

This application is a continuation of U.S. Nonprovisional application Ser. No. 18/383,017 filed Oct. 23, 2023, which is a continuation of U.S. Nonprovisional application Ser. No. 17/838,086 filed Jun. 10, 2022, abandoned, which is a continuation of U.S. Nonprovisional application Ser. No. 16/411,786 filed May 14, 2019 and issued as U.S. patent Ser. No. 11/384,492 on Jul. 12, 2022, which claims the benefit of priority to U.S. Provisional Application No. 62/671,223 filed May 14, 2018. The disclosure of each of these prior-filed applications is incorporated by reference herein in its entirety.

A silt fence, usually made of porous fabric, is often used as a material barrier for construction sites, landscaping operations, surface water ways (such as creeks and rivers), river banks or shores, etc. Silt, clay, sediment, and other ground material may be swept away by wind, water, and gravity. The fabric pools such ground material carried in the runoff and retain the material by the settling processes, e.g., in creeks, rivers, or still bodies of water. As such, traditional silt fences have been used to control the displacement of silt and its subsequent deposition in undesirable locations.

A traditional silt fence can be just a semi-permeable fabric installed vertically on the ground, e.g., by stapling the fabric on posts or stakes driven to the ground. These silt fences suffer several drawbacks. For example, the coupling between the fabric and the posts (or stakes) are not secure enough and can be easily undone or torn during use, resulting in weak or leaky areas which allow excessive silt to pass through. The fabric material and its construction in traditional silt fence is often of insufficient strength, resulting in excessive stretching and sagging of the fence, and failure to trap silt due to inadequate settling time. Also, installation of traditional silt fences often requires digging a trench to bury and anchor a bottom part of the fabric material to add stability for the fence, but such a procedure can be labor intensive.

In one aspect, the present disclosure provides a fence or fencing system. In some embodiments, the fence comprises a wall panel portion having an upper edge and a lower edge, an apron portion extending from the lower edge of the wall panel portion, the apron portion having a distal spaced from the lower edge, and a plurality of tubular pockets running across the wall panel between the upper edge and the lower edge, the tubular pockets each configured to receive a mounting post therein.

In other embodiments, the fence does not have a portion that is laterally positioned when installed. In the latter case, the fence can include a wall panel portion having an upper edge and a lower edge, wherein the wall panel comprises a first channel proximate the upper edge in which a first draw cord is threaded, and a second channel proximate the lower edge in which a second draw cord is threaded. The fence further includes a plurality of tubular pockets running across the wall panel between the upper edge and the lower edge, the tubular pockets each configured to receive a mounting post therein.

In some embodiments, the wall panel portion and/or the apron portion is formed of a flexible fabric material, such as a knitted polyethylene material. For example, for a fence system having an apron portion, the wall panel portion and the apron portion can be formed of a one-piece flexible fabric material.

The tubular pockets of the fence can be attached to the wall panel portion, or can be formed by a fold(s) of the wall panel portion. The fence can further comprise at least one grommet near the upper edge and proximate to at least one of the plurality of tubular pockets. The tubular pockets can each further include an inserted mounting posts, where the mounting posts can be coupled to the wall panel portion by a fastening mechanism, such as a zip tie, a knotted rope, etc.

The wall panel portion of the fence may include a channel proximate to the upper edge in which a first draw cord is threaded. For a fence with an apron portion, the apron portion may include a channel proximate its distal edge in which a second draw cord is threaded. For a fence without an apron portion, the wall panel portion can include a channel proximate the lower edge in which a second draw cord is threaded.

In another aspect, methods of installing a fence system is provided. For example, to install a fence having an apron portion, a plurality of mounting posts can be inserted each into one of the plurality of tubular pockets, axial positions of the mounting posts can be fixed relative to the tubular pockets, the plurality of the mounting posts are driven into the ground, and the apron portion is laid laterally on the ground. The distal edge of the apron portion can be further secured on the ground. To install a fence without an apron but has a channel near the lower edge of the wall panel with a drawing cord run therethrough, a similar method (except relating to the apron portion) can be used. The draw cord in the channel can be tensioned by using a plurality of securing stakes to secure it onto the ground, or wrapping around and/or tying the draw cord onto one or more of the mounting post(s).

In one aspect, the present invention relates to a fence system that can be used to control the movement of silt and filter out undesirable substances from a water ecosystem. The fence system can be installed in various sites that are susceptible to problems caused by the silt carried by storm water, such as in construction sites, lakes, creeks, rivers, and other waterways. The silt fence system is environment friendly and safe for wildlife, fish and other aquatic habitats. Therefore, some embodiments of the silt fence of the present invention are particularly useful for in-water work and/or perimeter control to safeguard water quality of the work location. In addition to silt fence application, the fence system disclosed herein can also be used to control the undesired migration of other solid material, such as snow.

is a schematic perspective view (looked from downstream) of one embodiment of a fenceof the present disclosure.is a schematic perspective view (looked from upstream) of one embodiment of a fenceof the present disclosure. Referring to both, the fencehas a wall panel portion. The wall portionhas an upper edgeand a lower edge, and a vertical length Ldefined between the upper edgeand the lower edge. An apron portionextends from the lower edgeof the wall panel. The apron portionhas a lateral length of L, and a distal edge. The fenceincludes a plurality of tubular pockets(only three are shown) running cross the wall panel portion between the upper edgeand the lower edge. The tubular pocketsare attached to the wall portion. The apron portionis not attached with the tubular pockets.

As shown in, the three tubular pocketscan define two subarcas,on the wall panel portion. The width of the subareas, Wand W(or the spacing between each neighboring two pockets) can be the same or different, and can be selected based on the specific applications of the fence and the location in which the fence is to be installed. For example, the width of each subarea can vary between about 0.5 m to about 20 m.

The vertical lengths (or height) Lof subareasandof the wall panel portioncan be the same or different, and can be selected based on the specific applications of the fence and the location where the fence is to be installed. For example, the vertical length Lof a subarea of the wall panel portioncan be from about 0.5 m to about 2 m. The vertical length of each of the tubular pocketscan be same or different, and can be greater or smaller than, or about the same as L. The lateral length Lof the apron portion can be selected based on specific applications. For example, Lcan be from 0.5 m to about 2 m.

Each of the wall portion, apron portion, and tubular pocketscan be formed from a same material or from different materials. The materials may be selected based upon the desired strength, longevity, overall cost of the fence, the location of the installation of the fence (e.g., flowing speed and silt content of the water in a water system), etc. In some embodiments, the material used to construct the wall portion, the apron portion, and/or the tubular pockets can be a flexible fabric material. In some embodiments, the flexible fabric material can be a mesh, woven, braided, or knitted form, although other forms can also be employed herein. In particular embodiments, the flexible fabric material can be a knitted fabric. The flexible fabric may have a single layer or more than one layer. For example, the fabric can have a two-layer forming a pocket structure therebetween, with one or more filter media inserted into the pocket structure. The filter media can be in the forms of powders, fibers, particulates and other forms, and can be made of porous silica, glass, polymeric materials, and other materials with suitable packing density to filter solid matters exceeding certain size thresholds, and/or those materials having appropriate chemical compositions suitable to absorb certain pollutants or contaminants such as heavy metals or toxic chemicals. In some embodiments, the fabric may have a basis weight of about 4-5 oz per square yard. Preferably, the fabric material does not leach any undesirable substance into a water system where it is installed. In some embodiments, the flexible fabric is made of knitted polyethylene fibers. Such material will not unravel if torn, unlike traditional silt fence products, and therefore provide better reliability in preventing contamination by undesired silt migration to sensitive areas.

In some embodiments, the wall panel portionand the apron portionare formed from a one-piece flexible material. In some embodiments, the apron portionand the wall panel portion are made separately by the same or different material, and are then joined together. For example, the apron portion may be formed by a heavier and tightly woven geotextile material, and is then sewn to the wall panel portion. Additionally, the apron portion may be attached with additional weights to ensure good contact with the installation ground.

As illustrated in, the tubular pocketseach are configured to receive a mounting post. The mounting post can be generally cylindrical, but can take other cross section shapes, such as oval, multilateral, T-shape, etc., The mounting postcan have a vertical length Lthat is greater than that of the tubular pocket where it is fitted. The lower end of the mounting postcan be generally pointed to facilitate the installation of the mounting post into the ground. The mounting post can be made from any suitable material such as wood, metal, and plastics.

In some embodiments, the fabric material along the upper edgeof the wall panel portioncan be folded onto itself, and the two layer of the fabric material can be sewn, riveted, buttoned up, or otherwise joined to create a channelin which a draw cordmay run through, as illustrated in.also shows the sewing linesfor closing the channel, as well as grommetsdisposed near the upper edge of the wall panel portion, and openingon the wall panel portion exposing a section of the draw cord. The grommets may be used to facilitate the coupling between mounting posts and the fence. The openingcan be used for coupling between reinforcing ropes with the fence via the draw cord.

In some embodiments, the fabric material along the distal edgeof the apron portioncan be similarly folded and closed to form a channelin which a draw cordmay be threaded, as shown in. The channelmay have openingsexposing sections of draw cord, which may be used as access points for coupling a fastening rope for further securement of the apron portion. Alternatively, the draw cordmay be directly pinned the ground by stakes with a hook or grabbing portion to hold down the draw cord.

The draw cords as used with the fabric of the present disclosure can be made from synthetic engineering plastics, such as Nylon 6 or Nylon 66, and can have a gauge of 5 mm or greater and a strength sufficient to hold the fabric in an uptight position when tensioned properly. While not shown, it is understood that sections of the draw cordcan also be used to wrap around or tie the top of the mounting posts.

In some embodiments, and as illustrated in, the tubular pocketcan be formed separately and coupled to the wall panel portionby a coupling mechanism, e.g., by sewing, riveting or otherwise joining a portion of the pocket to one side of the wall panel portion. In other embodiments, and as illustrated in, the tubular pocketbe formed by folding a portion of flexible material of the wall panel portion, and closing the folded portionby a coupling mechanism, e.g., by sewing, riveting or otherwise joining the base sectionsof the folded portion, thereby forming the tubular pocket.

The mounting posts can be inserted into the tubular pockets before installation of the fence. When a desired insertion position is obtained, it is necessary to prevent further axial movement between the mounting posts and the tubular pockets. This can be accomplished in a variety of ways. For example, as illustrated in(showing a cylindrical mounting post) andB (showing a mounting post with a T-shaped cross section), a portion of a mounting postexposed above the tubular pocketcan have a through hole, and fastening mechanism (e.g., a zip tie or a wire)can have an elongated elementthreaded therethrough and passing a rivet holenear the upper edgeof the wall panel portionand proximate the tubular pocket, thereby securing the mounting postrelative the tubular pocket. The tubular pocketnear its upper end may also be provided with rivet hole(s) to facilitate the securement of the mounting posts. In addition to or in the alternative to a through hole, the mounting post can have other features, such as hooks, loops, grooves that may be used to facilitate its coupling with the wall panel and/or the tubular pocket.

In some embodiments, the wall panel portion, the apron portion, and the tubular pockets are all formed from a one-piece flexible fabric material as described herein.

The fencecan be installed by inserting the mounting postsinto the respective pockets, and then driving the mounting postsgenerally vertically into the ground(see). In such a manner, the wall panel portionis substantially vertical to the ground after installation. The apron portioncan be laid laterally upstream (i.e., extending against the direction in which the silt tends to migrate) on the ground. The distal edgeof the apron portion can be fixed to the ground by stakes(see) that are driven through the apron material directly. Alternatively or additionally, the distal edgecan be secured on the ground by using ropesextending out from the openingsand coupled to the draw cord, and the distal end of the ropesare tethered to stakeswhich can be driven to the ground (see). This extended mode of securement allows the installation of the apron portion where the ground proximate the distal edge of the apron portion does not offer sufficient support. In some instances, the distal edgecan be secured to the ground by fixing the two outer ends of the draw cordto the ground, by fixing the exposed segments of the draw corddirectly to the ground by stakes. In certain instances, e.g., when the fence is installed in a water system (a bottom portion of the wall panel portion are submerged in water), the distal edgeof the apron can be laid laterally in water without fixation by stakes. The moving silt can quickly bury and immobilize the apron portion.

illustrate another embodiment of the fence systemof the present invention without an apron portion that is laid horizontally or laterally when the fence is erected. As shown in, similar to what have been described in connection with, the fenceincludes wall panel portionand a plurality of tubular pocketsattached in each of which a mounting postis inserted. However, this fence system does not include an apron portion. The wall panel portion near the upper edgehas a channel, which can be formed by folding the fabric material of the wall panel at the upper edge, in which a draw cordis threaded. The wall panel portion near the lower edgealso has a channel, in which a draw cordis threaded. The draw cordsandcan be tensioned to provide extra support to the wall panel portion, thereby added stability to the fence system. For example, an end portionof the draw cordcan be wrapped and/or tied up at an outermost mounting post(e.g., at an exposed portion of the post above the tubular pocketas shown), and an end portionof the draw cordcan also be wrapped and/or tied up at an outermost mounting post(e.g., at a portion lower than the tubular pocketas shown). Alternatively, such securement between the draw cordsandcan be between intermediate exposed loops of the cords and intervening mounting posts between the outermost mounting posts.

illustrate an alternative embodiment of securing the bottom of the wall panel portion, which has near its lower edgealso a channel, in which a draw cordis threaded. Here, a plurality of securing stakesare used along the channelto hold down the draw cordon the ground. The securing stakescan each include a bottom portionhaving a pointed tip for penetrating into the ground, and a top portionwhich can include a bend to hook or grab the draw cord. When the securing stakes are driven down the ground, they can hold the draw cordtightly onto the ground, thereby providing a better closure between the bottom edge of the wall panel and the ground. The distance between neighboring securing stakescan be the same, e.g., every 1 foot, every 2 feet, every 3 feet, or it can be varied depending on the installation location and condition.

The securement by the draw cords are especially important at the foot of the wall panel which is primarily responsible for blocking the migrating silt and other ground material. Tensioning the bottom part of the wall panel, e.g., by securing the draw cord in the bottom channel of the wall panel to the mounting posts and/or to the securing stakes as shown inallows an easy installment of the fence system without the need to dig a trench. The lower edge of the wall panel can be simply left to rest on the ground without being buried because the lower edge is sufficiently reinforced by the properly tensioned draw cord to withstand the impact of the migrating silt, thereby reducing chance of damage or leak.

The fence systems described herein can be installed on the ground in a way where all the installation locations of the mounting posts form a straight line, as shown in/B and. Alternatively, the mounting posts can be installed in any other geometry as required or desired for any specific applications, e.g., a curved arrangement for protecting a particular area of a water system (shown in).

In some embodiments, to improve the ability of the fence systems of the present invention (e.g.,or) to withstand the impact of high flow of silt, such as a water systemhaving a bank, as illustrated in, reinforcing ropescan be used to tie the mounting poststo anchoring stakesinstalled on the solid ground on the bankand away from the installation location of the fence. Additionally or alternatively, one end of reinforcing ropescan be coupled to the draw cordnear the upper edge of the wall panel portion(e.g., through openingshown), and the other end of reinforcing ropesare tethered to anchoring stakesinstalled on the solid ground on the bank. A similar configuration of tying ropes and anchoring stakes can be used for installing the fence system in other locations (and not in water), such as a construction site, the foot of a slope where soil erosion is underway or expected.

In some embodiments, reflective tags or indicators can be included in the fence system described herein to increase visibility of the fence system, especially at low light condition. The reflective tags or indicators can be in the form of tapes, ribbons, a reflective coating, etc., which can be installed, attached, applied, or otherwise secured on the fabric, the anchoring stakes, the securing ropes, and/or other parts of the fence system.

The description provided herein is not to be limited in scope by the specific embodiments described which are intended as single illustrations of individual aspects of certain embodiments. The methods, compositions and devices described herein can comprise any feature described herein either alone or in combination with any other feature(s) described herein. Indeed, various modifications, in addition to those shown and described herein, will become apparent to those skilled in the art from the foregoing description and accompanying drawings using no more than routine experimentation. Such modifications and equivalents are intended to fall within the scope of the appended claims.