Patent Abstract:
A short turn rotary fastener that comprises a helical prong, a fastenable material that comprises a prong receptor, a fastener system that comprises a short turn rotary fastener and a fastenable material, and a storage system comprised of a short turn rotary fastener and fastenable materials in the form of a shelf and a support. The prong can be self-tapping to allow for the absence of a prong receptor in a material. A prong can have a thickened portion to limit the penetration of the fastener into the material. Multiple prongs may be joined by a connector. The fastener may have a rotating mechanism such as a shape change metal or a lever to engage or disengage the fastener. A fastenable material can be a variety of items such as a block, a bar, a connector, or a support piece.

Full Description:
BACKGROUND OF THE INVENTION  
       [0001]     A common type of rotary fastener is the inclined plane wrapped around a central shaft. This fastener usually requires many full rotations to fasten. One of these, commonly called a wood screw, has a taper.  
         [0002]     There are fasteners that utilize a tooth or non-helical prong. They may require a backing piece to deform them into a rounded non-helical shape.  
         [0003]     There is a design for the male members of a fastener that uses hooks for surface mounting, and, while rounded, are not helically shaped.  
         [0004]     Other rotary fasteners are short turn types, designed so that they can be engaged or disengaged with a short rotation about their insertion axis, frequently a quarter turn. Some fasteners require the fastener to engage a backing piece to hold the materials together. Some require a thick shaft. Some fasteners utilize a mixture of flexible or resilient appendages attached to a carrier such as a key, stud, pin, or bolt that goes through an opening in the joinable material. This opening is sometimes referred to as a keyway, passage, cavity, or socket. These openings in the materials to be fastened are large in size compared to the appendage to allow for the carrier.  
         [0005]     A washer, grommet, or similar device is frequently used to spread the compression load and keep the fastener from crushing the materials being fastened, while the carrier sustains the transverse forces.  
         [0006]     Some of the problems of the prior art are that some fasteners can require multiple turns. Some are not scalable. Some require a backing piece. Some are for surface to surface connection only. Many require a large opening in the material to be fastened to allow for the carrier.  
       SUMMARY AND BRIEF DESCRIPTION  
       [0007]     This discovery solves one or more of the problems of the prior art. Other advantages will be apparent.  
         [0008]     The present disclosure teaches a scalable, short turn rotary fastener employing a helical prong subject to the definitions below. The term “short turn” means a rotation of 360 degrees or less. Thus, the term “short turn rotary fastener” means a fastener that requires a rotation of 360 degrees or less to fully engage or disengage and typically is a quarter-turn fastener. Also disclosed is a material having a receptor for a prong. The prong and the material with a prong receptor comprise a fastener system.  
         [0009]     A helix can be defined as a curve for which the tangent makes a constant angle with a fixed line. One skilled in the art could deviate from an exact helix and still be within the teachings of this disclosure. The terms “helix” and “helical” in reference to the subject of the present teaching, throughout this disclosure including claims and descriptions of the drawings, unless otherwise noted, means a shape within about 25% of the maximum value of an exact helix. While an exact helix will have an exact constant angle, the constant angles in the subject of the present disclosure may have a variation.  
         [0010]     For example, the formula for an exact helix centered upon the z axis is x=a cos Θ, y=a sin Θ and z=b Θ where a and b are constants and Θ is in radians. For real dimensions, we will use the absolute values of the trigonometric functions. For a quarter-turn fastener, the sine and cosine vary from 0 to 1. Since a is a constant, the maximum value of x and y is therefore a. For a quarter-turn fastener, Θ varies from 0 to π/2 radians. Hence the maximum value of z is b*π/2. Similarly, for a ⅓ turn fastener, Θ=2π/3 radians, the maximum cosine is 1 and the maximum sine is 1. For a full turn fastener, Θ=2π radians, and the maximum sine and cosine are 1.  
         [0011]     For a given amount of rotation, Θ, the constant angle the prong makes is related to the depth of the prong (z) and the distance from the axis of the helix (x and y). For a given z, increasing the length of the prong, that is increasing the maximum x and y, reduces the constant angle.  
         [0012]     The amount of rotation required to engage a rotary fastener is dependent upon the length the prong must travel and the constant angle of the prong receptor.  
         [0013]     Some of the considerations in determining the length of the prong are the depth of the materials to be fastened, the strength required of the prong, and the amount of rotation of the prong. The strength of the materials themselves can be the main sources of support. Over rotation of a fastener can be prevented by use of a prong connector. A thickened portion on a prong can limit the compression on a fastened material.  
         [0014]     The term “prong” in reference to the subject of the present teaching, throughout this disclosure including claims and descriptions of the drawings, means a short turn, helical prong. The short turn rotary fastener can have a single prong or a plurality of prongs. The short turn rotary fastener can be a separate prong or be an integral part of the materials to be fastened. A plurality of prongs can be separate or connected to each other.  
         [0015]     A fastenable material is a material that has a prong receptor. A prong receptor is an aperture region of a fastenable material that cooperates with a prong to allow the prong to be inserted into, and be engaged by, the fastenable material.  
         [0016]     A fastener system is comprised of a rotary fastener and a fastenable material.  
         [0017]     One skilled in the art should consider the stresses and strains, tension, compression and shear of the loads on the materials to be fastened including those exerted by a prong. The forces on a prong should be considered in selecting the composition of the prong. Another aspect that one skilled in the art should consider in selecting a suitable composition for the prongs is the amount of friction between the prong and the fastenable material. Multiple prongs can be used to spread the forces over a larger portion of the fastened materials, to increase the strength of the fastener, to distribute forces over more prongs and to increase the total amount of friction generated. A prong can be held in place in various ways including by a stop or by the prong receptor being slightly smaller than the prong. In designing a prong and prong receptor, one skilled in the art should consider the required degree of holding of the fastener by the prong receptor. 
     
    
     DESCRIPTION OF THE DRAWINGS  
       [0018]     These and other features, aspects, and advantages of the present invention will become better understood with regard to the following description, appended claims, and accompanying drawings, where:  
         [0019]      FIG. 1A  shows an embodiment of a short turn rotary fastener, a fastenable material, and a fastener system;  
         [0020]      FIG. 1B  shows the cooperation of a short turn rotary fastener and a fastenable material of  FIG. 1A ;  
         [0021]      FIG. 2A  shows an embodiment of a multi-prong short turn rotary fastener, a fastenable material with prong receptors in the shape of a conical well, and a fastener system;  
         [0022]      FIG. 2B  shows the cooperation of a multi-prong short turn rotary fastener and fastenable material of  FIG. 2A ;  
         [0023]      FIG. 3A  shows an embodiment of a multi-prong short turn rotary fastener where the prongs have a thick portion and a thin portion, fastenable materials with prong receptors of different sizes, and a fastener system;  
         [0024]      FIG. 3B  shows the cooperation of the multi-prong short turn rotary fastener and the fasteneable materials of  FIG. 3A ;  
         [0025]      FIG. 4A  shows an embodiment of a multi-prong short turn rotary fastener with a stop, fastenable materials, and a fastener system;  
         [0026]      FIG. 4B  shows the cooperation of the multi-prong short turn rotary fastener and the fasteneable materials of  FIG. 4A ;  
         [0027]      FIG. 5A  shows an embodiment of a multi-prong short turn rotary fastener, part of a fastener system, using a shape metal alloy wire and a spring for disengagement and engagement rotation and part of a fastener system;  
         [0028]      FIG. 5B  shows an embodiment of a fastenable material with the short turn rotary fastener of  FIG. 5A  mounted on the fastenable material;  
         [0029]      FIG. 5C  shows the cooperation of a short turn rotary fastener and the fastenable materials of  FIG. 5B ;  
         [0030]      FIG. 5D  shows the cooperation of the prongs of multiple short turn rotary fasteners and multiple fastenable materials of  FIG. 5B , and part of a fastener system;  
         [0031]      FIG. 6A  shows an embodiment of a short turn rotary fastener, fastenable materials, a fastener system, and a storage system;  
         [0032]      FIG. 6B  shows the cooperation of the short turn rotary fastener and fasteneable materials of  FIG. 6A ;  
         [0033]      FIG. 7A  shows an embodiment of a multi-prong short turn rotary fastener with a lever for rotation;  
         [0034]      FIG. 7B  shows an embodiment of a fastenable material in the shape of a bracket;  
         [0035]      FIG. 7C  shows an embodiment of a fastener system using the short turn rotary fastener of  FIG. 7A , the fastenable material of  FIG. 7B , and an embodiment of a fastenable material in the form of a mounting strip; and,  
         [0036]      FIG. 7D  shows a cutaway view of the cooperation of the short turn rotary fastener and fastenable material of  FIG. 7C . 
     
    
     DETAILED DESCRIPTION  
       [0037]     Referring to  FIG. 1A , short turn rotary fastener  10  is a full turn fastener comprising a prong  11 , a slotted cap  13 , and a tip  12 . When viewed along an axis from slotted cap  13  to tip  12 , short turn rotary fastener  10  fastens in a counter-clockwise direction.  
         [0038]     Short turn rotary fastener  20  is a quarter turn fastener comprising a prong  21 , a slotted cap  23 , and a tip  22 . When viewed along an axis from slotted cap  23  to tip  22 , short turn rotary fastener  20  fastens in a clockwise direction.  
         [0039]     In this embodiment, tip  12  is a square point and tip  22  is a chisel point.  
         [0040]     Still referring to  FIG. 1A , fastenable material  18  comprises prong receptor  16 , and fastenable material  19  comprises prong receptor  17 . In this embodiment, both fastenable material  18  and fastenable material  19  are a soft material such as pine wood. Prong receptor  16  and prong receptor  17  are designed to cooperate with short turn rotary fastener  10  such that prong  11  can be inserted into, and engaged by, prong receptors  16  and  17 . While there are many ways to retain a rotary fastener, in this embodiment prong receptor  16  and prong receptor  17  are sized slightly smaller than prong  11  to hold short turn rotary fastener  10  in place.  
         [0041]     In this embodiment, short turn rotary fastener  10  is made of a flexible, resilient substance such as PVC. Further, prong  21  is of a sufficient strength and tip  22  is of a sufficient sharpness that short turn rotary fastener  20  is self-tapping with regards to fastenable materials  18  and  19  and in this embodiment is made of aluminum.  
         [0042]     Fastenable material  18  has a depth d 201  and fastenable material  19  has a depth d 202 . Short turn rotary fastener  10  has a depth d 203  measured from the slotted cap  13  to the tip  12 . Short turn rotary fastener  20  has a depth d 204  measured from the slotted cap  23  to the tip  22 . In this embodiment, the depth of short turn rotary fastener  10 , that is d 203 , and the depth of short turn rotary fastener  20 , that is d 204 , are approximately equal to the depth of the fastenable materials to be fastened, d 201 +d 202 . In this embodiment, d 201  and d 202  are approximately 3 inches each. Dimensions d 203  and d 204  are each approximately six inches.  
         [0043]     Referring to  FIG. 1B , fastenable materials  18  and  19  are aligned such that prong receptors  16  and  17  can receive prong  11 . Tip  12  is placed on prong receptor  16  and rotated via slotted cap  13  into prong receptors  16  and  17 . Tip  22  of short turn rotary fastener  20  is placed on fastenable material  18  with sufficient pressure to drive prong  21  into fastenable material  19  and then rotated a sufficient amount to join fastenable materials  18  and  19 .  
         [0044]     In this embodiment, by using counter-rotating short turn rotary fasteners  10  and  20 , fastenable materials  18  and  19  are less likely to rotate apart.  
         [0045]     Referring to  FIG. 1A , an embodiment of a fastener system is comprised of short turn rotary fastener  10  and fastenable material  18 . Another embodiment of a fastener system is comprised of short turn rotary fastener  10  and fastenable material  19 .  
         [0046]     Referring to  FIG. 2A , short turn rotary fastener  140  comprises a plurality of prongs  141  joined by a prong connector  143 . Prong connector  143  is circular and allows the prongs  141  to be maneuvered simultaneously. Prongs  141  are comprised of a tip  142 , leading surface  151 . Leading surface  151  has a constant angle of 30 degrees prior to insertion. Prongs  141  have a depth d 208 . Prongs  141  are comprised of a flexible and resilient substance such as Acetal or PVC.  
         [0047]     Fastenable material  144  has a depth d 205  and is comprised of prong receptors  145  in the shape of a conical well. Fastenable material  146  has a depth d 206  and is comprised of prong receptors  147  in the shape of a conical well. Fastenable material  148  has a depth d 207  and is comprised of prong receptors  149  in the shape of a conical well. In this embodiment, d 205 , d 206 , and d 207  are each about one millimeter. The d 208  dimension is about three millimeters.  
         [0048]     Prong receptor  145  has a narrow opening  154  and a wide opening  155 . Prong receptor  147  has a narrow opening  156  and a wide opening  157 . Prong receptors  145  and  147  have a constant angle of 30 degrees to allow prongs  141  to pass through. Prong receptor  149  has a narrow opening  158  and a wide opening  159  and has a constant angle of 30.1 degrees to exert a restraining force on prongs  141 . Prong receptors  145 ,  147 , and  149  are designed to cooperate with prongs  141  such that prongs  141  can be inserted into, and engaged by, prong receptors  145 ,  147 , and  149 .  
         [0049]     Referring to  FIG. 2B , prong receptors  145 ,  147 , and  149  are aligned so that, when prongs  141  of short turn rotary fastener  140  are inserted in prong receptors  145  and rotated, prongs  141  engage, in succession, prong receptors  145 ,  147 , and  149 .  
         [0050]     In operation, prongs  141  of fastener  140  are placed on the narrow openings of prong receptors  145 . Light pressure is applied to prong connector  143  to seat the prongs  141  into prong receptors  145 . Then prong connector  143  is rotated to cause the prongs  141  to advance through prong receptors  145 , through prong receptors  147  and into prong receptors  149 .  
         [0051]     The leading surfaces  151  bear along the inside walls of prong receptors  145 ,  147 , and  149  to provide sufficient friction to retain fastener  140  in fastenable materials  144 ,  146 , and  148 .  
         [0052]     Referring to  FIG. 2A , an embodiment of a fastener system is comprised of short turn rotary fastener  140  and fastenable material  144 . Another embodiment of a fastener system is comprised of short turn rotary fastener  140  and fastenable material  146 . Yet another embodiment of a fastener system is comprised of short turn rotary fastener  140  and fastenable material  148 .  
         [0053]     Referring to  FIG. 3A , short turn rotary fastener  30  comprises a plurality of prongs  31  joined by a prong connector  33 . Prong connector  33  is circular and allows the prongs  31  to be maneuvered simultaneously. Prongs  31  are comprised of a thick prong portion  34 , a thin prong portion  35 , and a tip  32 . Thick prong portion  34  has a depth d 214  and thin prong portion  35  has a depth d 215 .  
         [0054]     Fastenable material  38  has a depth d 211  and is comprised of prong receptors  36 . Fastenable material  39  is compressible, has a depth d 212 , and is comprised of prong receptors  37 . Fastenable material  48  has a depth d 213  and is comprised of prong receptors  47 .  
         [0055]     Prong receptors  36 ,  37 , and  47  are designed to cooperate with prongs  31 . Prong receptors  36  and  37  are designed to cooperate with thick prong portion  34  and thin prong portion  35  such that, prongs  31  can be inserted into, and rotationally engaged, by prong receptors  36 ,  37 , and  47 . Prong receptors  47  are designed to cooperate with only the thin prong portion  35 , limiting the penetration of prongs  31  into fastenable material  48 .  
         [0056]     Referring to  FIG. 3B , prong receptors  36 ,  37 , and  47  are aligned so that, when short turn rotary fastener  30  is inserted in prong receptor  36  and rotated, thin prong portion  35  passes through prong receptors  36  and  37  to engage prong receptor  47 . Prong connector  33  serves as a stop to limit penetration of short turn rotary fastener  30  into fastenable materials  38 ,  39 , and  48 . The depth d 214  of thick prong portion  34  is approximately equal to depths d 211  plus d 212  (d 211 +d 212 ). Dimension d 215  of thin prong portion  35  must be long enough to secure fastener  30  into fastenable material  48 , and, in this embodiment, is approximately equal to d 213 .  
         [0057]     Referring to  FIG. 3A , an embodiment of a fastener system is comprised of short turn rotary fastener  30  and fastenable material  38 . Another embodiment of a fastener system is comprised of short turn rotary fastner  30  and fastenable material  39 . Yet another embodiment of a fastener system is comprised of short turn rotary fastner  30  and fastenable material  48 .  
         [0058]     Referring to  FIG. 4A , short turn rotary fastener  60  is comprised of a plurality of prongs  61  joined by a prong connector  63 . Prong  61  is further comprised of a tip  71 . In this embodiment, prong connector  63  can rotate all the prongs simultaneously.  
         [0059]     Fastenable material  68  is comprised of a plurality of prong receptors  66  and fastenable material  69  is comprised of a plurality of prong receptors  67 . Prong receptors  66  and  67  are designed to cooperate with prongs  61  such that when prong receptors  66  and  67  are aligned, prongs  61  can enter prong receptors  67  after passing through prong receptors  66 .  
         [0060]     Further comprising short turn rotary fastener  60  is a pivot  72 , a pivot bar  73 , a spring holder  75 , and spring  74 . Pivot  72  and spring holder  75  are mounted on fastenable material  68 . Pivot bar  73  is mounted on pivot  72  and has a protrusion  76  opposite to spring  74  such that as prong connector  63  rotates, spring  74  causes pressure through pivot bar  73  on protrusion  76  towards prong connector  63 . Protrusion  76  rides along a prong  61  and prong connector  63  until protrusion  76  and detent  65  are aligned. Spring  74  exerts pressure, through pivot bar  72 , onto protrusion  76 . Protrusion  76  and detent  65  serve as a stop retarding further rotation of prong connector  63 .  
         [0061]     Referring to  FIG. 4B , prongs  61  are engaged by prong receptors  66  and  67 . Protrusion  76  is engaged by detent  65 .  
         [0062]     Referring to  FIG. 4A , an embodiment of a fastener system is comprised of short turn rotary fastener  60 , fastenable material  68 , and fastenable material  69 .  
         [0063]     Referring to  FIG. 5A , fastener case  88  encloses a short turn rotary fastener  80 . Short turn rotary fastener  80  is comprised of a plurality of prongs  81  joined by a prong connector  83 . Prong  81  is comprised of a tip  82 . Prongs  81  are retracted and short turn rotary fastener  80  is shown in the energized or fastener disengaged position. Short turn rotary fastener  80  is further comprised of a pivot  92 , a pivot bar  93 , a connector pivot post  98 , and a connector retractor  99 . Pivot  92  is connected to fastener case  88 . Shape metal pivot post  91  and connector pivot post  98  are mounted on pivot bar  93 .  
         [0064]     One skilled in the art can select a size and shape of a shape metal alloy to generate an appropriate force. In this embodiment, the shape metal alloy is a shape metal alloy wire  85 . Short turn rotary fastener  80  is further comprised of jacks  86 , an energizer wire  84 , shape metal alloy wire  85 , post  103 , post  104 , and post  105 . Jacks  86  accept energizing power from an exterior source and provide it to energizer wire  84 . Energizer wire  84  carries the energizing power from jacks  86  to shape metal alloy wire  85 .  
         [0065]     Shape metal alloy wire  85  is fixedly attached to post  103 , extends around posts  104  and  105 , and is fixedly attached to shape metal pivot post  91 .  
         [0066]     Shape metal alloy wire  85  is extended around posts  104  and  105  to increase its length so as to obtain the required amount of contraction. The selection of the composition of shape metal alloy wires is well known. One skilled in the art can determine the ratio of the major components and the additional additives to arrive at the desired features. In this embodiment, approximately equal amounts of nickel and titanium by number of atomic nuclei are used.  
         [0067]     Still referring to  FIG. 5A , rotation of prong connector  83  is accomplished in the following manner. Spring  94  is fixedly connected to post  95  and also to prong connector  83 . Spring  94  normally contracts sufficiently to cause short turn rotary fastener  80  to be in the fastener engaged position. When energizing power is applied to jacks  86 , the power is carried by energizing wire  84  to shape metal alloy wire  85 . Shape metal alloy wire  85  heats and contracts. Shape metal alloy wire  85  is attached at one end to post  103 . The contraction causes tension on pivot shape metal pivot post  91  and pivot bar  93  to retract. As pivot bar  93  retracts, connector pivot post  98  moves to increase clockwise tension on prong connector  83 , causing prong connector  83  to rotate prongs  81  against the tension of spring  94 . As shown in this figure, shape metal wire  85  is energized and the prongs  81  are retracted to the fastener disengaged position.  
         [0068]     Referring to  FIG. 5B , fastenable material  101 , a structural piece, is comprised of fastener case  88 , engaging prong receptor  89 , and receiving prong receptor  97 . Prongs  81  are in engaging prong receptors  89 . Engaging prong receptors  89  are designed to cooperate with receiving prong receptors  97  to allow prongs  81  to pass through engaging prong receptors  89  into receiving prong receptors  97 .  
         [0069]     Referring to  FIG. 5C , two sections of fastenable material  101  are mated and prongs  81  are engaged by receiving prong receptor  97  through engaging prong receptor  89 . Inside fastener case  88  are prongs  81  connected by prong connector  83 . Jacks  86  are not receiving energizing power and prongs  81  are extended in the engaged position.  
         [0070]     Referring to  FIG. 5D , fastenable materials  101  are aligned for joining. Inside fastener case  88 , prongs  81  are retracted and engaged by engaging prong receptors  89 . Engaging prong receptor  89  is aligned with a receiving prong receptor  97  to allow prongs  81  to be engaged by receiving prong receptor  97 .  
         [0071]     Referring to  FIGS. 5A and 5D , an embodiment of a fastening system is comprised of short turn rotary fastener  80  and a fastenable material such as fastenable material  101 .  
         [0072]     Referring to  FIG. 6A , storage system  110  is comprised of a plurality of shelves  111 , and a plurality of supports  114 . Storage system  110  is further comprised of cap prong  118  and cap prong connector  113 . Cap prong  118  is further comprised of a cap prong tip  117 .  
         [0073]     Shelf  111  is comprised of a plurality of shelf prong receptor  112 . Support  114  is comprised of a plurality of support prongs  115  and a plurality of support prong receptors  116 . Support prong  115  is further comprised of a support prong tip  119 .  
         [0074]     Shelf prong receptors  112  are designed to cooperate with support prongs  115  and cap prongs  118  such that prongs  118  can be inserted into, and rotationally engaged by, shelf prong receptors  112 .  
         [0075]     In this embodiment, shelf prong receptors  112  receive support prongs  115 . Another shelf  111  is aligned over supports  114  such that shelf prong receptors  112  cooperate to allow cap prongs  118  to rotate through shelf prong receptors  112  into support prong receptors  116 .  
         [0076]     Referring to  FIG. 6B , shelf prong receptors  112  of a shelf  111  engage support prongs  115  of support  114 . Another shelf  111  is atop support  114  and aligned so that cap prongs  118  proceed through shelf prong receptors  112  and engage support prong receptors  116 .  
         [0077]     Referring to  FIG. 6A , an embodiment of a fastener system according to this teaching is comprised of a cap prong  118  and a support  114 . Another embodiment of a fastener system is comprised of a cap prong  118  and a shelf  111 . Yet another fastener system according to this teaching is comprised of a support  114  and a shelf  111 .  
         [0078]     Referring to  FIG. 7A , there is a short turn rotary fastener  120 . Short turn rotary fastener  120  is comprised of a plurality of prongs  121 , a prong connector  123 , and a rotating mechanism  125 . Prong  121  has a tip  122 . Rotating mechanism  125  is attached to prong connector  123 . In this embodiment, rotating mechanism  125  is a lever. Prong connector  123  allows the prongs  121  to be rotated with a single action.  
         [0079]     Referring to  FIG. 7B , bracket  126  is comprised of a plurality of bracket prong receptors  128 .  
         [0080]     Referring to  FIG. 7C , there is a mounting strip  132  comprised of a plurality of mounting strip prong receptors  133 . Bracket prong receptors  128  and mounting strip prong receptors  133  are designed to cooperate with prongs  121  such that prongs  121  can be inserted into and rotationally engage bracket prong receptors  128  and mounting strip prong receptors  133 . The bracket prong receptors  128  of bracket  126  are aligned with the mounting strip prong receptors  133  of mounting strip  132 . Prongs  121  of short turn rotary fastener  120  are positioned over bracket prong receptors  128 . Rotating mechanism  125  rotates prong connector  123 , causing prongs  121  to engage mounting strip prong receptors  133  through bracket prong receptors  128 .  
         [0081]     Referring to  FIG. 7D , bracket  126  is fastened to mounting strip  132  by short turn rotary fastener  120 . Prongs  121  engage bracket prong receptors  128  and mounting strip prong receptors  133 .  
         [0082]     Referring to  FIG. 7C , an embodiment of a fastener system according to this teaching is comprised of short turn rotary fastener  120  and bracket  126 . Another embodiment of a fastener system is comprised of short turn rotary fastener  120  and mounting strip  132 .  
         [0083]     While I have illustrated and described several embodiments of the invention, it should be apparent that changes and modifications may be made in the construction of the prong, the short turn rotary fastener or the prong receptor without departing from the spirit or scope of the invention. Accordingly, I do not desire to be limited to the exact construction shown and described. My invention should not be limited by the drawings.

Technology Classification (CPC): 5