Abstract:
A garbage disposal installation tool for installing garbage disposal units under sinks providing two degrees of height adjustment that consists of a flat base portion, a hollow cylindrical housing portion that has an operable locking system attached to the base portion, a hollow cylindrical shaft portion sliding longitudinally inside the housing portion, wherein sliding position temporarily secured and locked by the locking system, a flat top platform portion having an externally threaded rod portion extending perpendicular to the top platform, and a rotatable lever bar nut having an internally threaded center through hole with screw threads matchingly corresponding with the threaded rod portion, wherein rotation of the lever bar nut causes axial motion of the externally threaded rod portion resulting in raising and lowering of the top platform portion.

Description:
RELATED APPLICATIONS 
   This application is a Continuation-in-Part of pending U.S. patent application Ser. No. 11/751,248 filed May 21, 2007 entitled GARBAGE DISPOSAL INSTALLATION TOOL, which is incorporated herein by reference in its entirety, and claims any and all benefits to which it is entitled therefrom. 

   FIELD OF THE INVENTION 
   This invention relates to a device for installation of a garbage disposal unit under a kitchen sink or other sink more efficiently and safely. 
   BACKGROUND OF THE INVENTION 
   A garbage disposal unit is an electrically-powered device typically installed under a kitchen sink between the sink&#39;s drain and the u-trap. It shreds food waste into very small pieces so that they can be passed through the plumbing and drain pipes without clogging. 
   Traditionally, in one method of use, garbage disposal unit installation consists of the following steps: 
   1. Removing existing drainpipe, p-trap and strainer body from the sink 
   2. Installing a new sink flange into the drain opening and secure by the mounting ring and/or snap ring. Then tightening the mounting screws. 
   3. Removing the plate on the bottom of the garbage disposal unit to expose the wiring. Move the garbage disposal under the sink and connect the wires from the disposal to the power source. Lastly, connecting the ground wire from the disposal to the ground on the disposal. Replacing the plate to cover the wires. 
   4. Aligning the garbage disposal unit with the three mounting ears on the sink mounting assembly. Holding the garbage disposal unit in place, turning the lower mounting ring until all three mounting ears are locked into the mounting assembly. 
   5. Installing the discharge tube and its gasket to the garbage disposal unit. Turning the garbage disposal unit until the discharge tube aligns with the drain trap. If using a dishwasher, connecting the dishwasher tube to the garbage disposal unit. 
   6. Once it is installed, locking the garbage disposal unit to the sink mounting assembly using the special wrench that came with the unit. 
   Due to the limiting space under the kitchen sink and the usually closed structure, garbage disposal installation is typically a one-person task. Installers usually have to hold a relatively heavy garbage disposal unit in one hand and try to complete Step 3 to Step 6 with the free hand. See in particular Insinkerator™ Food Waste Disposer Installation, Care &amp; Use Manual, Part No. 73104A-3/31/02, drawing FIG. 6-2 and related descriptive text on page 3 of the manual. Frequently installers find it difficult to maintain a secured position while trying to hold a heavy garbage disposal unit in one hand. As a result, some installers let the unit slip off their grip and drop it on the floor and causes damage to the unit or accident. Also, often installers suffer from muscle strain from holding the heavy garbage disposal unit for too long. Moreover, since the unit has to be held in a secured position throughout while installers are on their knees or squatting down, most installers tend to rush the installation process. Consequently, the garbage disposal unit might not be attached to the sink as secured as it should be. 
   Some installers use a stool or other sturdy subject to act as a platform to hold the garbage disposal unit during installation. However, the height of these objects is not adjustable, installers still have to hold the unit while attaching it to the bottom of the sink (Step 3 to Step 6), or raising it or lowering it. Also, it might even become a clutter that further hinders the task in a already clammed working area. 
   U.S. Pat. No. 7,401,392, issued Jul. 22, 2008 to Ramsey, entitled “JACK FOR SINGLE-HANDED GARBAGE DISPOSER INSTALLATION” discloses a lever jack with a platform for garbage disposal installation. Ramsey however does not teach two degrees of height adjustment, i.e. coarse and fine, as with the present invention. 
   U.S. Pat. No. Des. 261,794, issued Nov. 10, 1981 to Bechtel, entitled “RIFLE PEDESTAL FOR SHOOTING RANGES AND THE LIKE” discloses an height adjustable pedestal for shooting ranges and not for garbage disposal unit installation. 
   ADVANTAGES AND SUMMARY OF THE INVENTION 
   The present invention is a device and method to enhance the efficiency and safety in the garbage disposal unit installation process. 
   One object of the present invention is to minimizes the possibility of misalignment of garbage disposal unit and the sink mounting assembly by providing a secure and sturdy platform. 
   Another object of the present invention is to release the burden of holding the garbage disposal unit with one hand during installation. It will also prevent potential risks of garbage disposal unit falling off or bodily strain to installers. 
   Yet another object of the present invention is to increase efficiency of installation since both hands of installers are free to perform the required tasks. 
   Yet another object of the present invention is the adjustable height which elevates garbage disposal unit of any size to the exact position for installation. 
   Yet another object of the present invention is the adaptation of for all depths of sinks. Sinks ranging from 6 inches in depth, 7 inches in depth, 8 inches in depth and 10 inches in depth. The adjustable sleeve and the adjusting lever of the present invention allows two degree of control, i.e. coarse and fine, on height and can accommodate different sizes of heights of garbage disposals from 12 inches high to 13 inches high. 
   The present invention provides a more efficient, effective and safer way to install garbage disposal units of any size so it is useful to professional plumbers. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a representative top side isometric view of an embodiment of the garbage disposal installation tool  100  of the present invention. 
       FIG. 2  is a representative bottom side isometric view of an embodiment of the garbage disposal installation tool  100  of the present invention. 
       FIG. 3  is a top side expanded view of an embodiment of the garbage disposal installation tool  100  of the present invention showing the elevation system  300 . 
       FIG. 4  is a bottom side expanded view of an embodiment of the garbage disposal installation tool  100  of the present invention showing the elevation system  300 . 
       FIG. 5  is a representative top side isometric view of an alternative embodiment of the garbage disposal installation tool  100 ′ of the present invention. 
       FIG. 6  is a representative exploded view of an alternative embodiment of the garbage disposal installation tool  100 ′ of the present invention. 
       FIGS. 7A and 7B  are representative isometric view of an alternative embodiment of the garbage disposal installation tool  100 ′ in the engaging and disengaging mode respectively.  FIG. 7C  is a representative cross sectional view with operational dimensions of an alternative embodiment of the garbage disposal installation tool  100 ′. 
       FIG. 8  shows a method of use of the garbage disposal installation tool  100 ′ of the present invention. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
   The description that follows is presented to enable one skilled in the art to make and use the present invention, and is provided in the context of a particular application and its requirements. Various modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principals discussed below may be applied to other embodiments and applications without departing from the scope and spirit of the invention. Therefore, the invention is not intended to be limited to the embodiments disclosed, but the invention is to be given the largest possible scope which is consistent with the principals and features described herein. 
   It will be understood that in the event parts of different embodiments have similar functions or uses, they may have been given similar or identical reference numerals and descriptions. It will be understood that such duplication of reference numerals is intended solely for efficiency and ease of understanding the present invention, and are not to be construed as limiting in any way, or as implying that the various embodiments themselves are identical. 
     FIG. 1  is a representative top side isometric view of an embodiment of the garbage disposal installation tool  100  of the present invention.  FIG. 2  is a representative bottom side isometric view of an embodiment of the garbage disposal installation tool  100  of the present invention. 
   As shown in  FIGS. 1 and 2 , the garbage disposal installation tool  100  of the present invention consists of a top platform  111  with a cord notch  102  carved on its surface. In one embodiment, top platform  111  has the primary function for providing a balanced, sturdy and level support surface for any garbage disposal unit  99 . In one embodiment, cord notch  102  provides a space to gather and accommodate electric code, adaptor and/or disposal cord  502  during installation. 
   In one embodiment, the garbage disposal installation tool of the present invention  100  provides a sturdy platform to rest the disposal unit  99  on during installation. The adjustable height of the garbage disposal installation tool of the present invention  100  ensures the garbage disposal unit  99  is at the exact position right underneath the sink (not shown) for attachment to the sink at the three mounting ears on the sink mounting assembly. 
   As best shown in  FIG. 2 , top platform  111  is secured to the elevation system  300  by plate  211  which is secured by a plurality or 4 bolts  118  and nuts  210 . Plate nut  212  is located in the center of plate  211  and its main function is to secure and fasten threaded rod portion  117  to the entire top platform  111  of the garbage disposal installation tool  100  of the present invention. In one alternative embodiment, top platform  111 , plate  211  and plate nut  212  can be manufactured into one integral portion without assembly by molding or other manufacturing processes. In that case, bolts  118  and nuts  212  will not be necessary. 
     FIG. 3  is a top side expanded view of an embodiment of the garbage disposal installation tool  100  of the present invention showing the elevation system  300 .  FIG. 4  is a bottom side expanded view of an embodiment of the garbage disposal installation tool  100  of the present invention showing the elevation system  300 . As shown, base platform  115  is a flat structure made of sturdy materials such as but not limited to wood, steel, aluminum, plastic, composite or equivalent rigid material, with surface area similar but not less than that of top platform  111  to avoid toppling. 
   As best shown in  FIGS. 3 and 4 , in one embodiment the elevation system  300  consists of threaded rod portion  117 , adjusting lever  112  and supporting housing  113 . As shown in  FIGS. 3 and 4 , threaded rod portion  117  is perpendicularly erected and secured at the support flange  116 . Support flange  116  is secured on a flat base platform  115  by a plurality or 4 base bolts  119  and nuts  114 . As shown in  FIG. 4 , threaded rod portion  117  is fastened to nut  212  which is part of plate  211  that is firmly secured at the bottom of top platform  111  by a plurality or 4 bolts  210 . In one alternative embodiment, supporting housing  113  and flat base platform  115  can be manufactured as one integral portion, no assembly and therefore no bolts  210  will be required. 
   As shown in  FIGS. 3 and 4 , the length of threaded rod portion  117  may or may not exceed the length of support housing  113  by a large margin. In one embodiment, the length of support housing  113  is in the approximate range of 5 inch to 20 inch to be able to fit under most kitchen sinks and their surrounding structure. In one embodiment, support housing  113  takes shape of a hollow cylinder made of sturdy materials such as but not limited to steel or aluminum. The support housing  113  is optionally internally threaded. In one embodiment, threaded rod portion  117  takes the shape of an external thread which has inclined plane wrapper around the shaft. In one embodiment, threaded rod portion  117  is made of sturdy materials such as but not limited to steel or aluminum alloys and its outer circumference is less than inner circumference of support housing  113 . In one embodiment, adjusting lever  112  takes shape of a square tube or bar stock made of a sturdy, rigid material. As best shown in  FIG. 3 , in one embodiment there is a center hole  302  in the middle of adjusting lever  112  which has the matching circumference and threads to threaded rod portion  117 . Adjusting lever  112  has an operable length and thickness as may be desired. In one embodiment, adjusting lever  112  should have a minimum width of the outer diameter of support housing  113 . 
   As best shown in  FIGS. 3 and 4 , adjusting lever  112  is fastened to threaded rod portion  117 . In one embodiment, adjusting lever  112  is able to travel smoothly along the entire length of threaded rod portion  117  by being rotated clockwise and anti-clockwise. Once adjusting lever  112  is fastened to threaded rod portion  117 , the remaining shaft of threaded rod portion  117  is inserted in the hollow support housing  113  which inner circumference is larger than the outer circumference of threaded rod portion  117  and accommodates threaded rod portion  117 . As best shown in  FIGS. 3 and 4 , adjusting lever  112  also acts as a stopper to prevent the entire shaft of threaded rod portion  117  from being completely inserted inside support housing  113 . 
   As best shown in  FIGS. 3 and 4 , in one embodiment user can simply rotate adjusting lever  112  in direction A to travel upward on the shaft of threaded rod portion  117 . Consequently, it will increase the length of the portion of shaft of threaded rod portion  117  that is hidden inside the support housing  113  and subsequently decrease or lower the entire height of the top platform  111  of the garbage disposal installation tool  100  of the present invention. Conversely, to raise the top platform, user can rotate adjusting lever  112  in direction B to travel downward on the shaft of threaded rod portion  117 , which will decrease the amount of the shaft of threaded rod portion  117  that is remaining inside the support housing  113  and subsequently increase the overall height of the top platform  111  of the garbage disposal installation tool  100  of the present invention. When the ideal or desired height of the top platform  111  of the garbage disposal installation tool  100  of the present invention is achieved, user can just leave the adjusting lever  112  alone and it will automatically remain in a fixed, locked position to retain the desired height of the top platform  111  of the garbage disposal installation tool  100  of the present invention. As best shown in  FIG. 4 , in one alternative embodiment, a center hole  402  is drilled on the upper surface of flat base platform  115  and positioned right at the base of the support housing  113 . In one embodiment, center hole  402  has a depth of approximately half of the thickness of flat base platform  115  and an inside diameter and threaded inner surface matchingly corresponding with threaded rod portion  117 . In one embodiment, the main function of center hole  402  is to provide a secured anchor for threaded rod portion  117  when it reaches the flat base platform  115 . 
     FIG. 5  is a representative top side isometric view of an alternative embodiment of the garbage disposal installation tool  100 ′ of the present invention.  FIG. 6  is a representative exploded view of an alternative embodiment of the garbage disposal installation tool  100 ′ of the present invention. As shown in  FIG. 6 , threaded rod portion  117 ′ is fastened to nut  212  which is part of nut plate  211  that is firmly secured at the bottom of top platform  111  by a plurality or 4 bolts  210 . In one alternative embodiment, top platform  111 , nut  212  and nut plate  211  can be manufactured as one integral portion, no assembly and therefore no bolts  210  will be required. 
   As best shown in  FIGS. 5 and 6 , the key difference and improvement of the alternative embodiment of garbage disposal installation tool  100 ′ is the two-level elevation system  300 ′. The two-level elevation system  300 ′ consists of threaded rod portion  117 ′, adjusting lever  112 , adjustment housing  113 ′ and the additional element, adjustable sleeve  500 . As shown in  FIGS. 5 and 6 , adjustment housing  113 ′ is erected and secured by support flange  116 ′ which subsequently is secured on flat base platform  115  by a plurality or four sets of nuts and bolts  114  and  119 . In one alternative embodiment, supporting housing  113 ′, support flange  116 ′ and flat base platform  115  can be manufactured as one integral portion, no assembly and therefore no sets of nuts and bolts  114  and  119  will be required. 
   As shown in  FIG. 5 , the two-level elevation system  300 ′ consists of threaded rod portion  117 ′, adjusting lever  112 , adjustment housing  113 ′ and the additional element, adjustable sleeve  500 . Adjustment housing  113 ′ takes shape of a hollow cylinder made of sturdy materials such as but not limited to steel or aluminum. In one embodiment, there is a threaded through hole  504  on the side of adjustment housing  113 ′. As best shown in  FIG. 6 , adjustable sleeve  500  is a hollow tubular structure having an outer circumference that allows its entire structure to fit snugly but slide freely inside adjustment housing  113 ′. By sliding adjustable sleeve  500  along the length of the adjustment housing  113 ′, it provides the first degree of height adjustment of the entire garbage disposal installation tool  100 ′. The desirable position of adjustable sleeve  500  is locked by key  502 . In one embodiment, key  502  has a threaded shaft  506  having a threading pattern matchingly to that of the threaded through hole  504 . By turning the key  502 , threaded shaft  506  will go deeper through threaded through hole  504  until its tip touches the side of adjustable sleeve  500  and locks its position by friction. The locked position can be easily released by turning the key  502  in the opposite direction. The height adjustment by sliding adjustable sleeve  500  provide a rough adjustment to attain a desirable height of the entire garbage disposal installation tool  100 ′. In one embodiment, the lower tip of the cylindrical shaft portion viz. adjustable sleeve  500  has scale  620  embossed to indicate height. 
   In one embodiment, adjusting lever  112  takes shape of a square tube or bar stock made of a sturdy, rigid material. As best shown in  FIG. 6 , in one embodiment there is a center hole  302  in the middle of adjusting lever  112  which has the matching circumference and threads to threaded rod portion  117 ′. Adjusting lever  112  has an operable length and thickness as may be desired. In one embodiment, adjusting lever  112  should have a minimum width of the outer diameter of adjustable sleeve  500 . As best shown in  FIG. 6 , adjusting lever  112  is fastened to threaded rod portion  117 ′. Adjusting lever  112  is able to travel smoothly along the entire length of threaded rod portion  117 ′ by being rotated clockwise and anti-clockwise. Once adjusting lever  112  is fastened to threaded rod portion  117 ′, the remaining shaft of threaded rod portion  117 ′ is inserted in the hollow adjustable sleeve  500  which inner circumference is larger than the outer circumference of threaded rod portion  117 ′ and accommodates threaded rod portion  117 ′. As best shown in  FIG. 5 , adjusting lever  112  also acts as a stopper to prevent the entire shaft of threaded rod portion  117 ′ from being completely inserted inside adjustable sleeve  500 . 
   As best shown in  FIG. 5 , user can simply rotate adjusting lever  112  in direction A to travel upward on the shaft of threaded rod portion  117 ′. Consequently, it will increase the length of the portion of shaft of threaded rod portion  117 ′ that is hidden inside the adjustable sleeve  500  and subsequently decrease or lower the entire height of the top platform  111  of the garbage disposal installation tool  100 ′ of the present invention. Conversely, to raise the top platform, user can rotate adjusting lever  112  in direction B to travel downward on the shaft of threaded rod portion  117 ′, which will decrease the amount of the shaft of threaded rod portion  117 ′ that is remaining inside the adjustable sleeve  500  and subsequently increase the overall height of the top platform  111  of the garbage disposal installation tool  100 ′ of the present invention. In one embodiment, height markers  512  can be embossed or printed on the side of the adjustable sleeve  500  to indicate elevation height. To provide a better finger grip on the adjustable sleeve  500  during height adjustment, the upper tip of the adjustable sleeve  500  can be knurled on the outer surface. This rotation movement of the adjusting lever  112  provides a finer and second degree of height adjustment of the entire garbage disposal installation tool  100 ′. When the ideal or desired height of the top platform  111  of the garbage disposal installation tool  100 ′ of the present invention is achieved, user can just leave the adjusting lever  112  alone and it will automatically remain in a fixed, locked position to retain the desired height of the top platform  111  of the garbage disposal installation tool  100 ′ of the present invention. In summary, user will attain a rough height adjustment by sliding adjustable sleeve  500  along adjustment housing  113 ′ and lock the position by key  502 . Then user will rotate adjustment lever  112  in either direction A or B for fine adjustment until the optimal height of garbage disposal installation tool  100 ′ is achieved. 
     FIGS. 7A and 7B  are representative isometric view of an alternative embodiment of the garbage disposal installation tool  100 ′ in engaging and disengaging mode respectively.  FIG. 7C  is a representative cross sectional view with dimensions of an alternative embodiment of the garbage disposal installation tool  100 ′. As best shown in  FIG. 7A , garbage disposal installation tool  100 ′ of the present invention can be stored as one piece. In one alternative embodiment, users can take the threaded rod portion  117 ′ out of adjustable sleeve  500  and store the unit  100 ′ in 2 separate pieces. 
   As best shown in  FIG. 7C , the proposed height of the adjustable sleeve  500  should be in the approximate range of 4 to 5 inches which will make the entire garbage disposal installation tool  100 ′ accommodate most sinks in conventional kitchen ranging from 6 to 10 inches in depth and most commercial garbage disposal units  99  with height ranging from 12 to 13 inches usually. In one embodiment, operational dimensions of key parts of the garage disposal installation tool  100 ′ are best shown in  FIG. 7C . However, operation of the garbage disposal installation tool  100 ′ will not be affected for other reasonable dimensions within the approximate range. 
     FIG. 8  shows an embodiment of a method of use of the garbage disposal installation tool  100 ′ of the present invention. Four adjustable or fixed-length legs  504  can be added under base platform  115  to ensure the levelness of top platform  111  of garbage disposal installation tool  100 ′ during installation. In one embodiment of a method of use, user should put the garbage disposal installation tool  100 ′ of the present invention under the sink  508  and directly underneath sink flange  506 . Subsequently, user can be conservative and rotate adjusting lever  112  in direction A until most of the threaded rod portion  117  is inside support housing  113  and hence achieve the minimum height of garbage disposal installation tool  100 ′ of the present invention. In an alternative embodiment, if user can estimate the height of garbage disposal unit  99  that to be installed, user can adjust the height of garbage disposal installation tool  100 ′ of the present invention by rotating adjusting lever  112  in either directions to achieve a desirable distance between sink flange and top platform  111  of garbage disposal installation tool  100 ′ of the present invention. Subsequently, user can put the heavy garbage disposal unit  99  securely on the flat surface of top platform  111  of garbage disposal installation tool  100 ′ of the present invention. 
   As best shown in  FIG. 8 , power cable and disposal cord  502  can be gathered and secured temporarily at notch  102  to minimize hindrance during installation. User can then rotate adjusting lever  112  in direction B to elevate the top platform  111  of the garbage disposal installation tool  100 ′ of the present invention and garbage disposal unit  99  until the top of garbage disposal unit  99  is immediate underneath sink flange  506  for installation. User can also shift garbage disposal unit  99  horizontally on surface of top platform  111  to ensure an accurate fit at the sink flange  506  and complete necessary steps to finish installation. During the entire installation, the weight of the garbage disposal unit  99  is supported and maintained at the exact height by garbage disposal installation tool  100 ′ of the present invention and user have both free hands to complete the installation efficiently and safely. After installation, user can rotate adjusting lever  112  in direction A to lower the top platform of garbage disposal installation tool  100 ′ of the present invention for an inch or so. Subsequently, while garbage disposal installation tool  100 ′ of the present invention is still underneath garbage disposal unit  99 , user can examine whether garbage disposal unit  99  is installed properly and securely. If the examination result is satisfactory, user can further rotate adjusting lever  112  in direction A to lower the top platform until the entire garbage disposal installation tool  100 ′ of the present invention can be retracted from under the kitchen sink  508 . 
   Installation steps in details as follows: 
   Step 1: Users install the garbage disposal unit  99  connecting the flange  506  to the bottom of the sink  508 . 
   Step 2: Then users measure the distance from the bottom of the flange  506  to the bottom of the cabinet  510  and the height of the disposal unit  99 . Then you subtract the difference and set the garbage disposal unit  99  approximately ½ to ¾ inch below the flange  506 . 
   Step 3: Then users proceed to make sure the garbage disposal unit  99  has the electric cord attached to the garbage disposal unit  99  and the top platform portion  111  of the present invention  100 ′ has a cord notch  102  for the cord. 
   Step 4: Users also make sure that the plug is knocked at the side of the garbage disposal unit  99  for a dish washer connection if applicable. Users may also attach the drain adapter to the garbage disposal unit  99  making sure it is at the correct height to receive the P tap to the drain line. After the Steps 1 through 4 preparation users then place the garbage disposal unit  99  on the top platform portion  111  and move it to the center disposal flange aligning it to the connecting ears on the disposal flange  506  to the sink  508 . And then users raise the garbage disposal unit  99  by turning the adjustable lever  112  about half inch to engage the flange  506  and lock the disposal unit  99  to the flange  506  and turning the flange  506  by the ears provided on the flange  506 . Then users lower the top platform portion  111  approximately half inch and remove the garbage disposal installation tool  100 ′. Also if users are removing the old disposal unit, they should follow the same procedure as installing the disposal  99 . Users disconnect the flange  506  putting the weight on the garbage disposal installation tool  100 ′. In this method users only have to lift the disposal unit  99  one time setting it on the top platform portion  111 . This is a novel way to accomplish the task of installing and removing a garbage disposal unit  99 , manually installing it. 
   It will be understood that the threaded rod portion  117  and the adjusting lever  112  can be replaced with similar structure such as a worm gear, i.e., a gear consisting of a spirally threaded shaft and a wheel with marginal teeth that mesh into it. 
   This device is not only a novelty and it is a true and handy way to complete the installation of a sink garbage disposal. The present invention is a very simple method and not complicated. It is novel and the rather inexpensive and very much needed to install the disposal to the sink of a kitchen cabinet. 
   Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Although any methods and materials similar or equivalent to those described can be used in the practice or testing of the present invention, the preferred methods and materials are now described. All publications and patent documents referenced in the present invention are incorporated herein by reference. 
   While the principles of the invention have been made clear in illustrative embodiments, there will be immediately obvious to those skilled in the art many modifications of structure, arrangement, proportions, the elements, materials, and components used in the practice of the invention, and otherwise, which are particularly adapted to specific environments and operative requirements without departing from those principles. The appended claims are intended to cover and embrace any and all such modifications, with the limits only of the true purview, spirit and scope of the invention.