Field of the Invention The present invention relates to wall systems, and in particular, to modular wall systems made of a plurality of interconnecting, wall components.

Related Art As the demand for electrical power increases around the world, the development and use of nuclear reactors also increases. Accordingly, workers at such nuclear power plants have a great need for portable wall systems that prevent or minimize radiation emanating from a nuclear reactor itself and/or from activation products resulting from reactor operation because the workers often must go into areas of high radiation to perfonn required maintenance, inspections or repairs. Workers use such shielding wall systems as a means for protecting a designated work area within a nuclear power plant in order for the workers to work within the protected or shielded area without the worry of being exposed to high levels of radiation. In addition, federally required inspections of nuclear power plants necessitate open access to critical areas within the plant. Therefore, there is a need for a shielding system that is easily portable from one location to another while shielding persons within the protected area from unwanted radiation.

Early prior art shielding systems included lead sheets and concrete blocks, but neither of these were easily portable from one location to another. As a result, several patents were issued in attempts to solve the non-portability of these prior art systems. In U. S. Patent No. 4,090, 087 to Weissenfluh, a radiation shield is disclosed having= a bag filled with a liquid radiation attenuating material suspended from a mobile carrier. Although an arguable improvement over the early prior art, there are disadvantages with the'087 system. First, the system cannot fully protect an individual working behind the shield because the bag does not provide complete coverage. There are open areas on all sides of the bag between the mobile carrier and the bag as well as between the ground and the bag. Therefore, unwanted radiation will stream around the shield and compromise the area sought to be protected. The system continues in stating that the filler liquid can be any hydrogenous material which may have a boron compound as a neutron absorber. Therefore, if there is a shortage of such filler material, repairs, inspections, or other work may halt until such filler material is found and brought to the area. Third, the bags are hung from the mobile carrier, as shown in FIG. 11. Thus, the heavy weight of the filler material may compromise the hooks or fasteners holding the bag in place. If the hooks happen to fail, the bag would fall to the ground, perhaps even burst open.

In U. S. Patent No. 4,360, 736 to Weissenfluh, a radiation shield is disclosed which improves upon the shielding system of the'087 system. Specifically, an improved bag is disclosed which has a means for connecting opposing walls of the bag, thereby ensuring a uniform thickness of the bag throughout its length when filled with a radiation attenuating liquid and hung on a mobile carrier. Despite this improvement to the bag, the radiation shielding system has the same disadvantages as described with the'087 system above.

In U. S. Patent No. 4, 362, 948 to Weissenfluh, a radiation shield is disclosed being a free- standing container of a uniform thickness which is adapted to be used only with a radiation attenuating liquid. This shielding systems solves some of the problems with the prior'087 and '736 systems; however, it too has several disadvantages. First, the same problem exists in terms of having to use a radiation attenuating liquid. Second, the container has a fixed U-shape which cannot be altered according to the specific needs of the location sought to be protected. That is, if the target work area sought to be protected is in close proximity to walls, corners, stationary equipment, and the like, the pre-defined U-shape of the container may not work or fit within the confines of the target work area. Therefore, the'948 shielding system cannot be used.

In U. S. Patent No. 4,504, 739 to Weissenfluh, a method is disclosed for filling and emptying the shield system of the'948 patent. This method includes the introduction and emptying of both a gas and a radiation attenuating liquid to the container. Therefore, the same problem exists as with the other patented shielding systems described above.

Subsequent to these prior art patents, other commercially available shielding systems have been developed that use water as a filler material. However, as with the prior patented shielding systems, these conventional shielding systems all have a pre-defined shape such that each shape is targeted for a specific application. For example, there are hanging shields that operate as the container or bag of the'087 and'736 systems; there are U-shaped shields that operate as the free- standing container of'948 and'739 systems; and there are special form bags that conform to the exterior shape of a component or piece of equipment, e. g. , a section or intersection of pipes, and are intended to wrap and surround the target pipe or equipment.

The disadvantages with all of these prior art shield systems is that none of them are modular such that two or more components can be interconnected to form a unique shaped wall shielding system. By having predefined shapes, the use of the prior art shielding systems is limited. Therefore, there is a need for a portable and modular shielding system having component parts that interconnect to form a shielding wall of varying shapes and sizes.

Another disadvantage with the prior art shield systems is that there is no mechanism for interconnecting two or more shields while maintaining the shielding properties of the shields at the point of connection. For example, when placing two U-shaped shields next to each other in an attempt to protect a larger area, radiation may enter the protected area at the joint of the two adjacent shields. This is true whether the two shields overlapped each other (one placed in front of the other) or not. Therefore, there is a need for a portable and modular shielding system wherein two adjacent component shields maintain the integrity of the shield at their joint and prevent the protected area from seeing increased radiation levels.

Another prior art shielding system is shown in FIGs. 1 (A), (B) and 2. In this system, a prior art shield component 100 is designed having a main container 112 with a first end 102 and a second end 104. The first end 102 is a receiving end and the second end 104 is a locking end.

Specifically, the second end 104 has a cross-sectional shape that is generally circular wherein the diameter of the second end 104 is equal to the width or thickness of the main container 112. The first end 102 is concave in shape having a diameter and radius and is adapted to correspond to the generally circular shape of the cross section of the second end 104, such that the radius of the first end 102 is equal to the radius of the second end 104. In addition, the prior art shield component 100 is hollow so that it can be filled with any radiation attenuating material, e. g., water. Filling and draining of this prior art system is accomplished through an open port at the top of the shield section, making this an open system.

Using two or more prior art shield components 100, a user can build a prior art shielding wall 200 as shown in FIG. 2. For example, a first shield component 202, having a first (or receiving) end 206 and a second (or locking) end 208, is placed adjacent to a second shield component 204, also having a first (or receiving) end 210 and a second (or locking) end 212. As shown, the locking end 208 of the first shield component 202 is placed within the receiving end 210 of the second shield component 204, thereby creating a conventional"ball and socket"joint.

Once in the proper position, the first shield component 202 can be secured to the second shield component 204 by conventional means.

The main disadvantage with the prior art shield components 100 and a resulting prior art shielding wall 200 is readily apparent at the joint 216 of the first shield component 202 and the second shield component 204. As the first shield component 202 rotates in relation to the second shield component 204 (that is, as the locking end 208 of the first shield component 202 rotates within the receiving end 210 of the second shield component 204), a gap 214 is created thereby compromising the integrity of the shielding wall 200 at that location. That is, at the gap 214 in the j oint 216, there is less shielding protection for persons in the protected area because the level of protection is less than the width, or thickness, of each shield component 202,204.

Therefore, there is still a need for a modular wall component that provides the same level of protection against radiation at its joints of two adjacent components as it does along the length of each such component.

Summary of the Invention The present invention is a modular and portable shielding system that solves the problems of the prior art shielding systems. A portable and modular shielding system is disclosed having various modular wall components that can be interconnected to form a custom designed shielding wall configuration, wherein the resulting wall provides shielding from radiation at its joints of two adjacent modular wall components as well as along its entire length.

There are four types of modular wall components in the present invention. The principal modular wall component is a main container being generally rectangular in shape and having a connector container, being an elongated cylinder, e. g. , a tube, having a cross section that is generally circular in shape, integrally connected to the second end of the main container, thereby making it a locking end. The first end of the main container is concave in shape and adapted to correspond to the generally circular shape of the connector container, thereby making it a receiving end for the locking end of an adjacent modular wall component. A second modular wall component is a main container having a connector container on each of its ends. A third modular wall component is a main container wherein each of its ends is a receiving end for a connector container of an adj acent modular wall component. A fourth modular wall component is a main container wherein its first end is a receiving end for a connector container of an adjacent modular wall component and its second end is a straight end such that it can abut up to an existing flat wall or surface.

The modular wall components of the present invention may be hollow containers adapted to receive a filler material, e. g. , water, or may be solid, e. g. , concrete. Furthermore, one or more internal supports may be used to strengthen and ensure the shape of the modular wall components, as well as, one or more leg supports may be used to support a modular wall component in a free standing and upright position on a base surface, e. g., the ground.

In operation, a shielding wall is designed and built by interconnecting two modular wall components. That is, a connector container of a first modular wall component is fit and secured into a receiving end of a second modular wall component. This interconnection of two adjacent modular wall components is similar to a"ball and socket"joint. Therefore, an advantage of the present invention is that a custom-designed shielding wall may be built according to the restrictions of the area sought to be protected-the target area. The design simply uses the modular wall components needed for the specific target area. In addition, because a connector container can rotate within a receiving end of another modular wall component, two adjacent modular wall components can be interconnected at any angle up to 90 degrees in either direction.

A mechanical fastener also can be used to further secure the two adjacent modular wall components.

Another advantage of the present shielding system is that the resulting shielding wall prevents radiation streaming at its joints. There are no open seams in the resulting shielding wall which would allow the unwanted radiation to penetrate. Also, the shielding wall has a uniform thickness along its entire length, even at its joints of two adjacent modular wall components.

Therefore, the modular wall components of the present system provide a better shielded target area for workers.

Another advantage of the present invention is that a means to fill and drain the modular wall components may be positioned on the front face of the modular wall components. This allows for a first modular wall component to be stacked on top of a second modular wall component wherein the fill and drain means of the two modular wall components are connected.

Description of Figures The present invention is described with reference to the accompanying drawings. In the drawings, like reference numbers indicate identical or functionally similar elements.

Additionally, the left-most digit (s) of a reference number identifies the drawing in which the reference number first appears.

FIG. 1 (A) is a perspective diagram of the exterior of a prior art shield component; FIG. 1 (B) is a perspective diagram of the interior construction of the prior art shield component; FIG. 2 is a perspective diagram of a prior art shielding wall using two prior art shield components; FIG. 3 is a perspective diagram of the exterior of a principal modular wall component of the present invention; FIG. 4 is a perspective diagram of the interior construction of the principal modular wall component of the present invention; FIG. 5 (A) is a perspective diagram of a second modular wall component of the present invention; FIG. 5 (B) is a planar diagram showing the front view of the second modular wall component; FIG. 5 (C) is a planar diagram showing the top view of the second modular wall component; FIG. 6 (A) is a perspective diagram of a third modular wall component of the present invention; FIG. 6 (B) is a planar diagram showing the front view of the third modular wall component; FIG. 6 (C) is a planar diagram showing the top view of the third modular wall component; FIG. 7 (A) is a perspective diagram of a fourth modular wall component of the present invention; FIG. 7 (B) is a planar diagram showing the front view of the fourth modular wall component; FIG. 7 (C) is a planar diagram showing the top view of the fourth modular wall component; FIG. 8 is a perspective diagram showing a shielding wall of the present invention; FIG. 9 is a planar diagram showing the top view of the shielding wall; FIG. 10 is a perspective diagram showing an alternative shielding wall of the present invention; FIG. 11 is a planar diagram showing the top view of the alternative shielding wall; FIG. 12 is a perspective diagram showing a second alternative shielding wall; and FIG. 13 is a planar side view of an alternative locking pin assembly of the present invention.

Detailed Description The shielding system of the present invention is comprised of one or more modular wall components that can be interconnected to form a shielding wall of varying shape and size. The preferred modular wall component 300 is shown in FIGs. 3 and 4, wherein FIG. 3 shows the exterior of a modular wall component 300 and FIG. 4 shows the interior construction of a modular wall component 300. The modular wall component 300 is the principal modular wall component of the present invention and has a main container 302 being generally rectangular in shape having a first end 304, a second end 328, and a width, or thickness, 330. The rectangular shape of the main container 302 is for convenience, and it would be readily apparent to use another shape according to the target area sought to be protected, e. g., U-shaped.

The main container 302 is hollow such that it has an internal cavity 344 adapted to store a filler material. Possible filler material includes, but is not limited to, water, sand, concrete, composite material, or any radiation attenuating liquid. As a means for supporting the main container 302, one or more internal cross supports 314 and/or one or more cross panels 326 may be used to secure a front face 332 to a back face 334 of the main container 302. The preferred cross supports 314 are elongated bars or rods whereas the preferred cross panels 326 are rectangular panels. Both the cross supports 314 and the cross panels 326 secure the front face 332 to the back face 334 via conventional means (e. g. , welding, adhesive, fasteners, clips, etc.), thereby making the main container 302 stronger during use and transport. The number and location of cross supports 314 and cross panels 326 is determined by the size of the modular wall component 300 being designed and built. Therefore, once the modular wall component 300 is filled with filler material, the main container 302 retains its intended shape.

A connector container 306 is an elongated cylinder, such as a tube, having a cross section that is generally circular in shape with a diameter 336 and radius 338, thereby making it a "locking end"ofthe main container 102. Preferably, the diameter 336 of the connector container 306 is greater than the width 330 of the main container 302. In addition, in the preferred embodiment, the ratio of the width 330 of the main container 302 to the diameter 336 of the connector container 306 is 1: 1.42. This ratio is for convenience purpose only. It would be readily apparent to one of ordinary skill of the relevant art to use any diameter 336 of the connector container 306 as long as the diameter 336 is greater than the width 330 of the main container 302.

The connector container 306 is integrally connected to the second end 328 of the main container 302 such that an internal cavity 344 of the main container 302 is in communication with the internal cavity 346 of the connector container 306. Therefore, the connector container 306 also is adapted to store the filler material. As seen on FIGs. 3 and 4, the connector container 306 is attached to, or made an integral part of, the main container 302 such that the front face 332 and the back face 334 of the main container 302 each are in contact with the external surface of the connector container 306. In addition, the connector container 306 is connected to the main container 302 such that the entire length of the second end 328 of the main container 302 is positioned within the connector container 306, thereby ensuring that the entire width of the main container 302 is in contact with the connector container 306. Thus, in this embodiment, the modular wall component 300 is made of the main container 302 and the connector container 306.

On the top surface 354 of the modular wall component 300 at the connector container 306, a locking pin 310 is centrally located. The locking pin 310 is a circular protrusion that is used as a means for interconnecting two adjacent modular wall components 300. The locking pin 310 is centrally located on the connector container 306 for convenience purpose only. It can easily be positioned at any location on the top surface 354. In addition, the locking pin 310 may be fixed to the top surface 354 permanently, or may be removable. The use of the locking pin 310 is described in greater detail below.

The first end 304 of the main container 302 is preferably concave in shape with a diameter 340 and a radius 342, and adapted to correspond to the generally circular shape of the cross section of the connector container 306, such that the radius 338 of the connector container 306 is about equal to the radius 342 of the first end 304 of the main container 302. Therefore, the first end 304 becomes a"receiving end"for a connector container 306 of a second modular wall component 300.

The modular wall component 300 is preferably made from 3/16 of an inch thick airplane grade aluminum but this is for convenience purpose only. It is possible to make this modular wall component 300 using plastic, a composite material, steel, rubber, and any comparable material. In addition, the cross supports 314 and cross panels 326 are made of the same material as the main container 102 and the connector container 106. Also, the preferred dimensions of the modular wall component 300 are about 7 feet in height, about 77 inches in length, and about 12 inches in width (its thickness). These materials and dimensions are described for convenience purpose only. It would be readily apparent to one of ordinary skill in the relevant arts to design, manufacture and use a modular wall component 300 of the present invention using comparable materials and different dimensions.

The modular wall component 300 also has a means for lifting the modular wall component 300 for transport. A first way of lifting the modular wall component 300 is a lifting assembly 308 secured to the top surface 3 54 of the modular wall component 300. In the preferred embodiment, the lifting assembly 308 is a flat base 348 having on its top surface a vertical support structure 350 with one or more holes 352. Thus, in transport, a hook can be removably attached to the hole (s) 352 such that a crane can lift the modular wall component 300 and move it.

Also, in the preferred embodiment, the lifting assembly 308 is made of metal and is bolted to the top surface 354 of the modular wall component 300. The use of metal and bolts for the lifting assembly 308 is for convenience purpose only. It would be readily apparent to one of ordinary skill in the relevant art to use a comparable material and means for securing the base 348 to the modular wall component 300.

A second way of lifting a modular wall component 300 of the present invention is to engage the one or more lifting points 316 on the bottom of the modular wall component 300.

The lifting points 316 are recessed areas sized and adapted such that the prongs of a conventional fork lift can be inserted into the lifting points 316. Thus, in transport, the fork lift inserts its prongs into the lifting points 316, then raises the prongs with the modular wall component 300 on top thereof, and moves the modular wall component 300 to a new location.

The modular wall component 300 also has a means for supporting the modular wall component 300 while it is free-standing on a base surface, e. g., the ground. One such means is one or more removable base leg supports 318 that can be placed on one or both sides of the modular wall component 300 as shown in FIGs. 3 and 4. In this embodiment, the base leg supports 318 are removable from the modular wall component 300 such that they can be removed during transport. In an alternative embodiment, the base leg supports 318 may be secured to the modular wall component 300 by conventional means, e. g. , welding, fasteners, clips, and the like.

The modular wall component 300 also includes a means for filling and draining the modular wall component 300 with filler material. In the preferred embodiment, this means for filling and draining comprises a fill and drain valve 312, a sight tube 320 for looking into the internal cavity 344 of the main container 302 of the modular wall component 300, and a pressure release valve 322 for use during filling and draining of the modular wall component 300. In operation, a user would open the pressure release valve 322 and fill the internal cavity 344 of the main container 302 and the internal cavity 346 of the connector container 306 with filler material by conventional means through the fill and drain valve 312. While checking the level of filler material in the internal cavity 344 visually through the sight tube 320, the user stops the flow of filler material when the desired level of filler material is reached. Once the modular wall component 300 is filled, the user closes the pressure release valve 322 and the fill and drain valve 312.

To drain the filler material from the modular wall component 300, the user opens the pressure release valve 322 then opens the fill and drain valve 312. The location of the fill and drain valve 312 dictates how the actual draining takes place. For example, as shown on FIGs.

3 and 4, the fill and drain valve 312 is located on the top surface 354 of the modular wall component 300, therefore, a conventional pump assembly is needed to pump the filler material out of the modular wall component 300. However, as shown on FIG. 5, one or more fill and drain valves 502 may be located on the front face 332 of the main container 302. For example, a fill and drain valve 502 may be positioned near the bottom of the main container 302.

Therefore, upon opening the bottom fill and drain valve 502 and a pressure release valve 322, gravity will drain the filler material from the modular wall component 500.

FIGs. 5-7 show different configurations for different components of the modular wall system of the present invention. The above description of modular wall component 300 and its features are equally applicable to each of these other components described below. In addition, these components are those of the preferred embodiment. It would be readily apparent to one of ordinary skill in the relevant art to use comparable components to design and build a portable shielding system of the present invention.

In FIGs. 5 (A)- (C), a second modular wall component 500 has a connector container 306 at both the first end 304 and the second end 328 of the main container 302. In FIGs. 6 (A)- (C), a third modular wall component 600 has a main container 602 wherein both its first end 604 and its second end 606 are receiving ends adapted for receiving a connector container 306 of another modular wall component, such as the principal modular wall component 300, as well as, the second modular wall component 5 00. In FIGs. 7 (A)- (C), the fourth modular wall component 700 has a main container 702 wherein a first end 704 is a receiving end adapted for receiving a connector container 306 of another modular wall component 300, and the second end 706 is a straight edge. This configuration of a second end 706 allows the fourth modular wall component 700 to be placed against a wall or other flat surface.

FIGs. 8 and 9 show a portable shielding system of the present invention in which different modular wall components are joined together to form a shielding wall barrier 800. FIG. 8 is a perspective view, and FIG. 9 is a top view, of the shielding wall barrier 800. For example, as shown in these two figures, the shielding wall barrier 800 is composed of joining together, in the following order, a fourth modular wall component 700, a second modular wall component 500, a third modular wall component 600, a second modular wall component 500, and a fourth modular wall component 700. An alternative shielding wall barrier 1000 is shown in FIGs. 10 and 11, wherein a second fourth modular wall component 700 is added to a convector container 306 at joint 1002. Thus, it is readily apparent that the modularity of the wall components of the present invention provide the means for a user to build a custom designed wall according to his/her specific shielding needs.

Two adjacent modular wall components are secured together with a means for locking, which is best shown and described in FIGs. 6-11. Referring to FIGs. 8 and 9, in the preferred embodiment, a modular wall component, such as fourth modular wall component 700, has a means for locking, e. g. , a locking pin assembly, pivotally attached to its top surface 708. As shown, the means for locking is a locking arm 608 pivotally connected to the top surface 708 of the fourth modular wall component 700 in proximity to the first end 704 of the fourth modular wall component 708 adapted to be a receiving end for receiving a connector container 306. The locking arm 608 has a hole 610 at its distal end. The connector container 306 of the adjacent second modular wall component 500 has a locking arm pin 310 located at about the center point of the top surface of the generally circular connector container 306 of one end of the second modular wall component 500. Therefore, in operation, the connector container 306 ofthe second modular wall component 500 is placed within the first end 704 of the fourth modular wall component 700. Once in position, the locking arm 608 of the fourth modular wall component 700 is swung over the connector container 306 of the fourth modular wall component 700 and the hole 610 of the locking arm 608 is placed over the locking arm pin 310, thereby securing the fourth modular wall component 700 with the second modular wall component 500. The locking arm 608 has a preferred length that is slightly larger than the radius of a connector container 306 in order to prevent the connector container 306 of the second modular wall component 500 from rotating too freely within the first end 704, or receiving end, of the fourth modular wall component 700.

The principal advantage of the present invention is that when a shielding system 800 is assembled, the joints of the shielding system 800, which is the location where each connector container 306 is fit within a receiving end of another modular wall component, has the same thickness or depth of protection as the main containers 302. This"ball and socket"design also allows a shielding system 800 to be quickly and easily deployed in almost any pattern or configuration while maintaining maximum protection at the joints. The"ball and socket"joints allow two adjacent modular components to rotate as much as 90 degrees to each other-enabling virtually any angle between the two components. This is an advantage when using the shielding system 800 as a radiation shield to protect workers from unwanted nuclear radiation. Although described in terms of radiation protection, the shielding system of the present invention can also be used as a highway water barrier, construction, or in any other area requiring a portable wall.

FIGs. 10 and 11 are a perspective and planer top view diagrams of an alternative shielding system 1000 showing two first ends 704, or receiving ends, of two different fourth modular wall components 700 connected with the same connector container 306 of a second modular wall component 500, thereby creating a"Y-shaped"joint 1002. In this embodiment, both locking arms 608 (the locking arm 608 of the first fourth modular wall component 700 and the locking arm 608 of the second fourth modular wall component 700) are secured to the locking pin 310 of the connector container 306 of the second modular wall component 500. This feature of being able to construct Y-shaped joints, e. g. , joint 1002, allows a user to design and build a shielding system 1000 of almost any imaginable pattern.

In an alternative shielding system of the present invention, each of the modular wall components, such as components 300,500, 600, and 700, is not adapted to receive a filler material, but rather, each wall component is made of a solid material, e. g. , concrete, a stone composition, or a composite material, having radiation attenuating properties. This alternative embodiment of wall components eliminates the need for containers (or any outer shell), internal supports, such as cross supports 314 and the cross panels 326, and external supports, such as leg supports 318, because the components are free-standing, solid forms. However, this embodiment preferably has one or more internal supports forthe internal structure ofthe components, e. g. , one or more re-bar supports as used in conventional concrete construction.

FIG. 12 is a perspective diagram showing a second alternative shielding wall 1200 wherein a first principal modular wall component 1202 is stacked on top of a second principal modular wall component 1204. In this embodiment, the lifting assembly 308 described above is not attached to the top surface 354 of the second principal modular wall component 1204, thereby allowing the first principal modular wall component 1202 to be placed on top. Also, in this embodiment, the first and second principal modular wall components 1202,1204 have atop fill and drain valve 1206 and a bottom 611 and drain valve 1208, both of which are positioned on the front faces 1212,1214 of the principal modular wall components 1202,1204.

In operation, the bottom fill and drain valve 1208 of the first principal modular wall component 1202 is connected to the top fill and drain valve 1206 of the second principal modular wall component 1204 via a conventional hose. A user then attaches a conventional hose to the bottom fill and drain valve 1208 of the second principal modular wall component 1204 to fill both principal modular wall components 1202,1204 with water. To disassemble the shielding wall 1200, the user opens the bottom fill and drain valve 1208 of the second principal modular wall component 1204 to drain both principal modular wall components 1202,1204.

In addition, the means for lifting a principal modular wall component 1202,1204 in this shielding system 1200 is one or more attachment flanges 1210 secured to the front face 1212 of the first principal modular wall component 1202 and the front face 1214 of the second principal modular wall component 1204. Using a hook and line, a crane attaches to the hole 1218 in one or more of the attachment flanges 1210 in order to lift and transport the principal modular wall component 1202,1204.

Also shown in FIG. 12 is an alternative means for supporting a principal modular wall component 1204 while it is free standing on a base surface, e. g., the ground. This means is one or more removable leg support bars 1216 that can be placed on one or both sides of the principal modular wall component 1204. In this embodiment, the top end of each leg support bar 1216 is connected to the attachment flanges 1210 on the front face 1214 of the principal modular wall component 1204 via a mechanical fastener, e. g. , a bolt or pin. The bottom end of each leg support bar 1216 is connected to the distal end of a leg support base 1212 also by a mechanical fastener, e. g. , a bolt or pin. The leg support base 1212 is secured to a leg support plate 1214 which is welded or otherwise secured to the front face 1214 of the principal modular wall component 1204. These leg support bars 1216 and leg support bases 1212 are removable from the principal modular wall component 1204, such as for transport, by simply removing the fasteners.

FIG. 13 is a planar side view of an alternative locking pin assembly of the present invention for locking together two adjacent modular wall components, such as two modular wall components 300, with a locking pin 1302 having a first end 1324 and a second end 1326. In this embodiment, the top surface 354 of a modular wall component 300 is shown. On one end, such as on the first end 304, or receiving end, of the modular wall component 300, a lock fastener 1312 is bolted to the top surface 354 by one or more bolts 1314. A lock fastener support 1316 is secured to the underside of the top surface 354 under the lock fastener 1312 in order to provide additional strength and support to the lock fastener 1312. The second end 1326 of a locking arm 1302 is secured to the lock fastener 1312 by a bolt, pin or other mechanical fastener. An engaging member 1304 with a hole 1306 is located on the first end 1324 of the locking pin 1302.

The locking pin 1302 is an elongated bar 1310 having a locking member 1308 centrally disposed on the elongated bar 1310. The engaging member 1304 is used to interconnect and secure one modular wall component, such as modular wall component 300, to an adjacent one.

Also on the top surface 354 of the modular wall component 300 is a removable locking pin 1318. The removable locking pin 1318 is threaded on its bottom so that it can be removably secured within a locking pin hole 1322 in a locking pin hole base 1320 secured underneath the top surface 354 of the modular wall component. The locking pin 1318 is used to interconnect and secure the one modular wall component, such as modular wall component 300, to a second adjacent one. The lock fastener 1312 and removable locking pin 1318 are removable from the top surface 354 so that the modular wall components 300 can be vertically stacked.

In operation, a connector container 306 of a first modular wall component 300 is positioned within the receiving end 304 of a second modular wall component 300. After the second end 1326 of a locking arm 1302 is secured to the lock fastener 1312 of the second modular wall component 300, the engaging member 13 04 of the locking arm 1302 is slipped over the removable locking pin 1318 of the first modular wall component 300. The diameter of the hole 1306 in the engaging member 1304 is slightly larger than the diameter of the locking pin 1318. Once the locking arm 1302 is in place, the locking member 1308 is tightened by turning it, thereby securing the first modular wall component 3 00 to the second modular wall component 300.

The present invention is described in these terms for convenience purpose only. It would be readily apparent for one of ordinary skill in the art to design and manufacture a comparable shielding system. Also, enough detail is provided herein to allow one of ordinary skill in the art to make and use the present invention.

Conclusion While various embodiments of the present invention have been described above, it should be understood that they have been presented by the way of example only, and not limitation. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined. Thus, the breadth and scope of the present invention should not be limited by any of the above-described exemplary embodiments.