Abstract:
A folding anchor made of at least two members consecutively inserted into an insertion hole of a panel. As leading members of the folding anchor enter the space behind the panel, they are predeterminedly repositioned relatively to their trailing members. The last member is mounted into the insertion hole. A member of the folding anchor that is not the last member comprises a fastening receiver. A fastening rod is fastened into the fastening receiver and generates pulling forces. Those pulling forces are transmitted and distributed via a stack of members of the folding anchor to a portion of the back surface of the panel, which counteracts those pulling forces.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates to the field of anchors used to fasten an object to a surface of a panel. 
       BACKGROUND 
       [0002]    Anchors are attached to panels by different designs and methods. Typically, anchors are consisted of a fastening receiver such as a nut attached to an anchor body. A fastening rod such as a screw or a bolt is fastened into the fastening receiver and forces applied on the fastening receiver are transmitted and distributed by the anchor body to a contact area of the panel. Counter forces generated by the panel counteract the forces transmitted to the panel. Most anchors are inserted through an insertion hole made in the panel. Some anchors are attached to the hole itself as they expend inside while other anchors use the back surface of the panel to counteract forces apply on them. 
         [0003]    Expending anchors are most useful in solid materials like wood, concrete, brick, mortar or metals. Expending anchors expand when fastening rods are inserted or threaded into the fastening receivers and produce high shear forces that prevent the anchors from dislodging. Therefore, the strength of the expending anchors depends on the strength of the material of the panel. 
         [0004]    Back-surface anchors are designed to be used in thin panels or in hollow walls. Back-surface anchors are inserted through an insertion hole in a panel and they are designed to open-up or spread behind the panel in a way that they cannot be pulled back through the insertion hole. The strength of a Back-surface anchors is proportional to the size of the back-surface contact area and more specifically, the length of the circumference of that area. Back-surface anchors could theoretically provide amazing resistances despite a relatively weak material of the panel. 
         [0005]    It is extremely important to match the right anchor with the material of the panel, the expected forces applied on the anchor and the direction of the forces. An anchor that is mismatched with the expected load, usage and the material of the panel will eventually loosen up and damage the panel. 
         [0006]    The most commonly used expanding anchors are the push-in plastic expansion anchors (for example, U.S. Pat. No. 1,878,600). They are available in many sizes and designs. When a screw is threaded into a plastic anchor it expands, exerting forces against the walls of the hole. Better expansion anchors are made of lead and metal. The stronger the panel material, the stronger the resistance provided by the expansion anchor. Push-in plastic expansion anchors may provide pulling resistance of around 30 pounds in concrete but less than 10 lbs in drywall. Generally speaking, plastic anchors hold well vertical forces such as hanging a picture frame but may be too weak for pulling forces that are perpendicular to the panel plan. 
         [0007]    Threaded drywall Anchors (for example, U.S. Pat. 8,192,123 B2), represent an improvement over the push-in plastic expansion anchors. Those anchors are threaded into the dry wall by a Philip&#39;s head fastening driver. Threaded drywall anchors are available in both nylon and metal and provide a better pulling resistance of about 15 lbs to 25 lbs in dry wall. Although threaded Drywall Anchors are stronger than push-in plastic anchors, they still should be used primarily for vertical forces and should not be used for significant pulling forces. 
         [0008]    A commonly used back-surface anchors are the winged plastic Anchors (for example, U.S. Pat. No. 4,993,901). This winged plastic anchors double the pulling resistance of a push-in plastic expansion anchors to about support from  25  to  35  lbs in drywall. As a fastening rod is inserted into a winged plastic anchors, the wings of the anchor are pushed out against the back of the panel. Tightening the fastening rods too much may cause damage to the threads resulting in a weaker anchor. 
         [0009]    Sleeve-type anchors have a better opening or spreading mechanism as they are combine a screw, a sleeve and a compression mechanism (for example, U.S. Pat. No. 2,918,841, U.S. Pat. No. 3,143,915 and U.S. Pat. No. 4,720,224). The sleeve-type anchors are easily pushed into a hole and as the fastening rod tightens the sleeve folds outwards and creates ‘teeth’ that hold the anchor against the backside of the panel. In hollow dry walls, sleeve-type Anchors can hold up to 50 lbs. In solid materials like a concrete wall, the sleeve-type anchors are actually very useful and provide good resistance to pull forces. 
         [0010]    The toggled anchors are back-surface anchors. The toggled anchors may either use hinged wings or a bar that distribute forces applied on the fastening receiver. Hinged wings type toggled anchor (for example, U.S. Pat. No. 3,389,631) looks like a pair of spring-loaded metal wings attached to a central fastening receiver having a long fastening rod. When the toggled anchor is inserted through the hole, the wings are folded toward the central fastening rod. Once the wings pass the thickness of the panel, they open up and press against the back surface of the panel as the fastening rod tightens. The strength of a traditional Wings type toggled anchor is about 30 lbs for a ⅛″ toggled anchor and 50 lbs for a ⅜″ toggled anchor. Bar type toggled anchors (for example, U.S. Pat. No. 549,069, U.S. Pat. No. 1,003,527, U.S. Pat. No. 1,061,480, U.S. Pat. No. 1,159,420 and many more) provide a larger contact area with the back surface of the panel. The size of the contact area is very important in preventing damages to the material of the panel. 
         [0011]    A SnapToggle anchors have several advantages over other types of bar type toggle anchors. (For example, US Patent Application 2011\0268528). The SnapToggle anchor is easy to insert and maneuver and it contains a plastic cap that slides over two plastic straps and locks the anchor in the insertion hole. The SnapToggle anchor is using a U shape bars that provide pull force up to 265 lbs in ½″ drywall. The advantage of a U shape bars is the long contacts circumference lines with the back surface of the panel and hence a better pulling resistance, however the disadvantage of a U shape bar is the very small contact area, which increases the risk of damages to the dry wall and overtime it may resulted in loosening of the anchor. A similar idea to the SnapToggle anchor is shown in another US patent (US Patent Application 2014\0102040). The anchor is actually based on a flat metal bar inserted through the insertion hole into to the space behind the panel. The metal bar is pulled by a cord that substitutes the role of the cap and the straps. 
         [0012]    There are certainly many more patents, patents applications and different designs that represent combinations, variations, modifications, improvements, enhancements and different uses of the basic anchors discussed above. Some of them provide real additional advantages while other may have no added value or may even be inferior to the anchors presented above. In summary, a good anchor design must be simple, ‘fool proof’, inserted through a small hole as possible, have a larger contact area on the back surface of the panel and have a smaller risk of future loosening of the anchor and/or damages to the panel. Therefore, despite numerous solutions and designs of anchors, there is still a need for better and simpler anchor, which is the objective of the current invention. 
       SUMMARY OF THE INVENTION 
       [0013]    The available anchors are products of our symmetrical thinking. The insertion hole creates an imaginary axis perpendicularly to the plane of the panel. Because of our symmetrical thinking, we rotate parts of the anchor away from the imaginary axis to hold the anchor in place. However, a non-symmetrical approach opens a door to a host of new anchors designs and creates numerous possibilities and combinations of anchors that offer significant improvements over the current art 
         [0014]    The folding non-symmetrical anchor is built from at least two consecutive members inserted through an insertion hole of the panel from the first member to the last member. Each two consecutive members are coupled by means for repositioning one member relatively to the other. Initially, those two consecutive members are positioned away from each other for the insertion through the insertion hole, but as the leading member of the two consecutive members passes the thickness of the panel and enters the space behind the panel, it repositions towards its trailing member. This process folds the anchor behind the panel. The last member is mounted into the insertion hole and thereby it controls the final position of each member of the anchor behind the panel. A member that is not the last member comprises a fastening receiver such as a nut. A fastening rod such as a screw or a bolt is inserted through the insertion hole is fastened into the fastening receiver. A stack of contiguous members having at least the one member comprises the fastening receiver is contiguous to a portion of the back surface of the panel and transmit and distribute pulling forces applied by the fastening rod on the fastening receiver to the panel. The panel generates counter forces that counteract those pulling forces. A common means for repositioning is a pivoting axis. A pivoting axis couples two consecutive members rotates the leading member relatively to its trailing member. A spring can be used to rotate members to theirs final position but gravity can be used as well. The pivotal axis between two members does not have to be positioned at the very end of the members. The pivotal axis could be positioned at other points along the members as long as the leading member can rotate in the space behind the panel and fulfill its function. 
         [0015]    Another means for repositioning is an elastic connector coupling two consecutive members. This type of means for repositioning is especially useful for inexpensive anchors made of materials such as plastic and nylon. Elastic connectors could be used for two-dimensional movements but elastic connectors could be used for complex three-dimension movements. Other means for repositioning include but not limited to combinations of several pivoting axes, sliding mechanisms, ball and socket joint mechanisms and combination of means. 
         [0016]    In a simple embodiment, the anchor is built of two members coupled by a pivotal axis. The anchor is inserted in its unfolded form. Once the first member passes the thickness of the panel and reaches the space behind the panel, it rotates against the second member, which is the last member of the anchor. The last member of the anchor comprises means for mounting including a ring that mounts into the insertion hole and a disk that lays against the frontal periphery of the insertion hole, thereby, the second member is controlling the position of the first member behind the panel. 
         [0017]    In other embodiments, the anchor is built of three members or more. Each two consecutive members are coupled by means for repositioning such as a pivotal axis. The anchor is inserted in its unfolded form. Once the first member passes the thickness of the panel and reach the space behind the panel, it rotates against the second member of the anchor. Then as the second member passes the thickness of the panel, it also rotates against the third member and so forth. The last member of the anchor has means for mounting in the insertion hole. This last step controls the final position of the members behind the panel. 
         [0018]    In yet other embodiments, at least one member of the folding anchors further comprises an additional at least one sub-member and means for repositioning such as a pivotal axis. In one of the embodiments, once the sub-member passes the thickness of the panel and reaches the space behind the panel, the sub-member turns in about  90  degrees to the originating member and creates a cross-like structure that further increases the contact area between the folding anchor and the back surface of the panel. 
         [0019]    In additional embodiments, at least one member of the folding anchor further comprises an additional at least one sub-member that is branching away from the member by means for repositioning such as a pivotal axis to further increase the contact area with the back surface of the panel. 
         [0020]    In some embodiments, the members do not reposition against each other but rather a side-by-side. Those embodiments allow leading members to reach the back surface of the panel. In one example of those embodiments, the anchor is made of two members. The first member is a metal bar having a pivoting axis on one end and a about centrally located fastening receiver. The second member is coupled at one end to the pivoting axis by a side-by-side configuration to the first member and on the other end of the second member comprises means for mounting including a ring and a disk that mount into the insertion hole. As the metal bar passes the thickness of the panel and reaches the space behind the panel, it rotates until it lay against the back surface of the panel. The fastening receiver of this metal bar is aligned with the insertion hole. 
         [0021]    In an economical version of the last embodiments, a simpler and cheaper elastic connector is substituted as means for repositioning. A variety of materials can be used including metal, plastic and/or nylon. The anchor comes in its folded final position. The members of the folded anchor are unfolded and inserted consecutively in a zigzag fashion into the insertion hole and the last member is mounted into the insertion hole. 
         [0022]    Yet other embodiments further include means for triggering. Members of the anchor are locked in their unfolded position by the means for triggering. Releasing the locked members to their final positions by the means for triggering is decided and timed by the operators. A pull rod or a sleeve that could be pulled back as the anchor is inserted provides an illustration of this concept. The exposed members of the anchor will then fold to their final position. Embodiments may further combine means for preventing rotation of the fastening receiver and/or any other member that is subjected to shear forces generated by the threading of the fastening rod into the fastening receiver. Means for preventing rotation may further wedge into the back surface of the panel and prevent damage and distortion of the folding anchor. Embodiments may further include means for preventing non-flushed seating of the stack on the back surface of the panel. During drilling of an insertion hole in the panel, some material of the panel can be pushed backwards creating a hump of the back surface of the panel around the insertion hole. This may happen when drilling is done too fast or forcefully. Mon-flushed seating of the stack on the back surface of the panel will result in fastening receiver that is not perfectly perpendicular to the panel resulting in difficulties of fastening the fastening rod into the fastening receiver. Means for preventing non-flush seating provide some space for pushed back panel material around the rim of the insertion hole that does get in the way between the frontal surface of the stack and the back surface of the panel. 
         [0023]    The current disclosure is also a novel method of inserting an anchor into a panel. The first step of the method is creating an insertion hole in said panel in a predetermined size and location for the insertion of the folding anchor. The next step is insertion of the members of the folding anchor consecutively from a first member to a last member. Each subsequent member of the folding anchor pushes each leading member into a space behind the panel where the leading members fold into their final position. The next step is mounting the last member into the insertion hole and essentially establishing the final position of all the members of the folding anchor. The next step is insertion of a fastening rod that is fastened into a fastening receiver of the folding anchor. The fastening rod transmits pulling forces to said fastening receiver and from there, the pulling forces are transmitted and distributed via a stuck of at least one member a portion of the back surface of the panel. The panel generates counter forces that counteract the pulling forces 
         [0024]    The different embodiments and methods disclosed in this application are just some examples to the host of implementations and combinations possible with the novel concept of the folding anchor. Some features, options, and advantages may be shown in certain embodiments but may not be shown in other. And yet, any part of the subject matter of the present invention may be combined in any suitable manner in one or more embodiments, designs and/or implementations. Any part of the present disclosure may be also incorporated into existing anchors. Furthermore, designs, structures, materials, features or operations may not shown or described in detail to avoid obscuring aspects of the subject matter of the present disclosure. The current disclosure describes the principals, concepts, details, designs, features, methods, structures, characteristics and/or advantages of the novel anchor so that anyone skilled in the art can understand and implement either all or any part of the subject matter. The features and advantages of the subject matter of the present disclosure will become more fully apparent from the following description and appended claims, or may be learned by the practice of the subject matter as set forth hereinafter. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0025]      FIG. 1 , A multi members anchor of four members coupled by three pivotal Axes in an unfolded position. 
           [0026]      FIG. 2 , The anchor of  FIG. 1  wherein the first and the second members passed the thickness of the panel and reached the space behind the panel, showing that the first member already rotated about 180 degrees and the second member still having about 90 degrees to rotate to its final position. 
           [0027]      FIG. 3 , The anchor of  FIG. 1  in its final folded position 
           [0028]      FIG. 4 , A two members anchor. The first member has two levels to ensure even contact of the first and second members with the back surface of the panel. 
           [0029]      FIG. 5 , The anchor of  FIG. 4  wherein the first member passed the thickness of the panel and reached the space behind the panel, showing that the first member have rotated by about 150 degrees. 
           [0030]      FIG. 6 , The anchor of  FIG. 4  in its final folded position 
           [0031]      FIG. 7 , A three members and one sub-member anchor. The two sub-member is connected by a pivotal axis in an unfolded position. 
           [0032]      FIG. 8 , The anchor of  FIG. 7  wherein the first member passed the thickness of the panel, reached the space behind the panel and have already rotated about 110 degrees. 
           [0033]      FIG. 9 , The anchor of  FIG. 7  wherein the first and the second members passed the thickness of the panel and reached the space behind the panel. The first member has already rotated about 180 degrees and the sub-member has already rotated by about 90 degrees creating a cross like configuration. 
           [0034]      FIG. 10 , The anchor of  FIG. 7  wherein the first member, the second member and the Sub-member are folding towards the last member. 
           [0035]      FIG. 11 , The anchor of  FIG. 7  in its final folded position. 
           [0036]      FIG. 12 , A different configuration of the anchor of  FIG. 7  wherein sub-members are branching out of the second member of  FIG. 7 . 
           [0037]      FIG. 13 , A two members anchor coupled by one pivotal Axis in its unfolded position wherein, the pivoting members do not oppose each other but rather rotate side-by-side allowing an overlap rotation 
           [0038]      FIG. 14 , The anchor of  FIG. 13  wherein the first member has passed the thickness of the panel, has reached the space behind the panel and has already rotated about 135 degrees. 
           [0039]      FIG. 15 , The anchor of  FIG. 13  in its final folded position 
           [0040]      FIG. 16 , A two members anchor coupled by one pivotal Axis in its unfolded position wherein, the pivoting members do not oppose each other but rather rotating side-by-side allowing an overlap rotation. In this embodiment the pivotal axis is not at the very end of the first member. The pivotal Axis is positioned so that the second member can still push the first member passed the thickness of the panel into the space behind the panel. In addition, the second member is curved and has some elastic properties. 
           [0041]      FIG. 17 , The anchor of  FIG. 16  in its final folded position. 
           [0042]      FIG. 18 , The anchor of  FIG. 17  in its final folded position showing the panel. The elastic curved second member is adding pressure on the first member against the back surface of the panel. 
           [0043]      FIG. 19 , The anchor of  FIG. 1  wherein an illustration of means for triggering in the form of a pull rod is added. The members of the anchor are locked in their unfolded position. 
           [0044]      FIG. 20 , The anchor of  FIG. 1  wherein the pull rod was pulled back and the first member has already folded to its final position and the second member has already rotated by about 135 degrees. 
           [0045]      FIG. 21 , A three members anchor coupled by two pivotal Axes in its unfolded position wherein, the members do not oppose each other but rather rotating side-by-side allowing an overlap rotation. Furthermore, the fastening receiver part of the first member transmits and distributes forces via the second member to the back surface of the panel. 
           [0046]      FIG. 22 , The anchor of  FIG. 21  wherein the first member has passed the thickness of the panel, has reached the space behind the panel and has already rotated about 120 degrees. 
           [0047]      FIG. 23 , The anchor of  FIG. 21  in its final folded position. The fastening receiver part of the first member transmits and distributes forces via the second member to the back surface of the panel 
           [0048]      FIG. 24 , A three members anchor coupled by two means for repositioning in the form of elastic connectors. 
           [0049]      FIG. 25 , The anchor of  FIG. 24  wherein the first and the third members are unfolded so that members can be inserted consecutively in a zigzag fashion through the insertion hole. Also shown means for preventing rotation by shear forces created by threading of the fastening rod. 
           [0050]      FIG. 26 , The anchor of  FIG. 24  wherein the first member has passed the thickness of the panel, has reached the space behind the panel and has already folded back toward the second member. 
           [0051]      FIG. 27 , A three members anchor coupled by two means for repositioning in the form of elastic connectors. The first member and the second member are crossing each other. The third member comprises a ring and a disk to be mounted into the insertion hole. 
           [0052]      FIG. 28 , The anchor of  FIG. 27  wherein the members were unfolded so that members can be inserted consecutively in a zigzag fashion through the insertion hole. 
           [0053]      FIG. 29 , A two members anchor coupled by means for repositioning in the form of elastic connectors in its folded form. The second member comprises a ring and a disk to be mounted into the insertion hole. Also shown means for preventing non-flushed seating of the stack on the back surface of the panel. 
           [0054]      FIG. 30 , The anchor of  FIG. 29  wherein the members were unfolded so that members can be inserted consecutively in a zigzag fashion through the insertion hole. 
       
    
    
     DRAWING REFERRENCE NUMERALS 
       [0055]      101 —Second member 
         [0056]      102 —Fastening receiver 
         [0057]      103 —First pivotal axis 
         [0058]      104 —First Member 
         [0059]      105 —Second pivotal axis 
         [0060]      106 —Third Member 
         [0061]      107 —Insertion hole mounting ring of forth Member 
         [0062]      108 —Insertion hole mounting disk of forth Member 
         [0063]      109 —Conduit 
         [0064]      110 —Rotational arrow showing the direction of the first member 
         [0065]      111 —Rotational arrow showing the direction of the second member 
         [0066]      112 —Means for triggering release of members to reposition in a form of a Pull-Rod 
         [0067]      113 —Arrow showing the direction of the Pull-Rod 
         [0068]      114 —Third pivotal axis 
         [0069]      115 —Arrow showing the direction of the third member 
         [0070]      151 —First member having different thicknesses and a fastening receiver 
         [0071]      152 —Pivotal axis 
         [0072]      153 —Second Member 
         [0073]      154 —Insertion hole mounting ring 
         [0074]      155 —Insertion hole mounting disk 
         [0075]      156 —Fastening receiver 
         [0076]      157 —Rotational arrow showing the direction of the first member 
         [0077]      201 —Second member having a fastening receiver 
         [0078]      202 —Fastening receiver 
         [0079]      204 —Sub-Member means for repositioning and means for passage of a fastening rod 
         [0080]      205 —Sub-member 
         [0081]      206 —First pivotal axis 
         [0082]      207 —First Member 
         [0083]      208 —Second pivotal axis 
         [0084]      209 —Insertion hole mounting ring 
         [0085]      210 —Insertion hole mounting disk 
         [0086]      211 —Conduit 
         [0087]      212 —Rotational arrow showing the direction of the first member 
         [0088]      213 —Rotational arrow showing the direction of the second member 
         [0089]      215 —Third member 
         [0090]      217 —Sub-member 
         [0091]      218 —Sub-member 
         [0092]      219 —Rotational arrow showing the direction of sub-member  217   
         [0093]      220 —Rotational arrow showing the direction of sub-member  218   
         [0094]      221 —Means for repositioning sub-member  217   
         [0095]      222 —Means for repositioning sub-member  218   
         [0096]      301 —First member 
         [0097]      302 —Pivotal axis 
         [0098]      303 —Second Member 
         [0099]      303 —Insertion hole mounting ring 
         [0100]      305 —Insertion hole mounting disk 
         [0101]      306 —Rotational arrow showing the direction of member  301   
         [0102]      307 —Conduit 
         [0103]      308 —Fastening receiver 
         [0104]      401 —First member 
         [0105]      402 —Second member made of two bended wires having some elastic properties 
         [0106]      403 —Pivotal axis 
         [0107]      404 —Rotational spring 
         [0108]      405 —Insertion hole mounting ring 
         [0109]      406 —Insertion hole mounting disk 
         [0110]      407 —Fastening receiver 
         [0111]      408 —Rotational arrow showing the direction of the first member  401   
         [0112]      408 —Panel 
         [0113]      501 —Second member 
         [0114]      502 —Fastening receiver in the form of a nut 
         [0115]      503 —Pivotal axis 
         [0116]      504 —Third member 
         [0117]      505 —Insertion hole mounting ring 
         [0118]      506 —Insertion hole mounting disk 
         [0119]      507 —Conduit 
         [0120]      508 —Pivotal axis 
         [0121]      509 —first member 
         [0122]      510 —A passage for the fastening rod 
         [0123]      511 —Rotational arrow showing the direction of the second member  501   
         [0124]      512 —Rotational arrow showing the direction of the first member  509   
         [0125]      601 —Second member 
         [0126]      602 —A passage for the fastening rod in the Second member  601   
         [0127]      603 —means for preventing rotation by shear forces created by threading of the fastening rod 
         [0128]      605 —Elastic connector 
         [0129]      606 —Elastic connector 
         [0130]      608 —A fastening receiver of the first member 
         [0131]      609 —Insertion hole mounting ring of the third member 
         [0132]      610 —Insertion hole mounting disk of the third member 
         [0133]      701 —Second member 
         [0134]      702 —A passage for the fastening rod in the Second member  701   
         [0135]      703 —Elastic connector 
         [0136]      704 —First member 
         [0137]      705 —Fastening receiver 
         [0138]      706 —Elastic connector 
         [0139]      707 —Insertion hole mounting ring of the third member 
         [0140]      708 —Insertion hole mounting disk of the third member 
         [0141]      709 —A Conduit 
         [0142]      801 —First member 
         [0143]      802 —Second member 
         [0144]      803 —Insertion hole mounting ring of the Second member 
         [0145]      804 —Insertion hole mounting disk of the Second member 
         [0146]      805 —Elastic connector 
         [0147]      806 —Fastening receiver 
         [0148]      807 —A Conduit 
         [0149]      808 —Means for preventing non-flushed seating of the stack on the back surface of the panel in the form of a space created around the mounting ring. 
       DETAILED DESCRIPTION 
       [0150]    Referring to  FIG. 1 , the folding anchor is constructed of four members and it is presented in its unfolded position. The first member  104  is coupled to the second member  101  by a pivoting axis  103 . The second member  101  is coupled to the third member  106  by a pivoting axis  105 . The third member  106  is coupled to the fourth member  107  and  108  by a pivoting axis  114 . Means for mounting the last member into the insertion hole are represented by ring  107  and disk  108 , but other designs can accomplish the same goal. The first member  104  is inserted first into the insertion hole (not shown). Means for rotating first member  104  in the direction of arrow  110  are represented by pivoting axis  103 . After the first member  104  has passed the thickness of the panel and has reached the space behind the panel, it is rotated by pivoting axis  103  in the direction of arrow  110  toward the second member  101 . Similarly, after the second member  101  has passed the thickness of the panel and has reached the space behind the panel, it is rotated by pivoting axis  105  in the direction of arrow  111  toward the third member  106 . The third member  106  is rotated by pivoting axis  114  in about 90 degrees in an opposite direction, as shown by arrow  115 , toward the back surface of the panel. 
         [0151]    Referring to  FIG. 2 , the second member  101  of the folding anchor of  FIG. 1  has passed the thickness of the panel and has reached the space behind the panel. The first member was already rotated about 180 degrees and the second member  101  is now being rotated by pivoting axis  106  in the direction of arrow  111  toward the third member  106 . 
         [0152]    Referring to  FIG. 3 , the folding anchor of  FIG. 1  is in its final folded position wherein the conduit  109  is aliened with the fastening receiver  102 . 
         [0153]    Referring to  FIG. 4 , a two members anchor presented in its unfolded position. The first member  151  is coupled to the second member  153  by a pivoting axis  152 . The first member  151  has two thickness levels so that the final folded anchor lays flat with the back surface of the panel. Means for mounting the last member into the insertion hole are represented by ring  154  and disc  155 . The first member  151  is inserted first into the insertion hole (not shown). After the first member  151  has passed the thickness of the panel and has reached the space behind the panel, the first member  151  is rotated by pivoting axis  152  toward the second member  153 . 
         [0154]    Referring to  FIG. 5 , the first member  151  of the folding anchor of  FIG. 4  has rotated about 150 degrees toward the second member  153 . 
         [0155]    Referring to  FIG. 6 , the folding anchor of  FIG. 4  is in its final folded position wherein the conduit  157  is aliened with the fastening receiver  156 . 
         [0156]    Referring to  FIG. 7 , the folding anchor is constructed of three members. The folding anchor is presented in its unfolded position. The first member  207  is coupled to the second member  201  by a pivoting axis  206 . The second member  201  is coupled to the third member  215  by a pivoting axis  208 . The second member  201  comprises a sub-member  214  and a pivoting axis  204 . Means for mounting the last member into the insertion hole are represented by ring  209  and disc  210 . The first member  207  is inserted first into the insertion hole (not shown). After the first member  207  has passed the thickness of the panel and has reached the space behind the panel, it is rotated by pivoting axis  206  in the direction of arrow  212  toward the second member  201 . After sub-member  205  has passed the thickness of the panel and has reached the space behind the panel, sub-member  205  is rotated by pivoting axis  204  in about 90 degrees, as shown by arrow  214 , and becomes about perpendicular to the second member  201 . After the second member  201  has passed the thickness of the panel and has reached the space behind the panel, the second member  201  is rotated by pivoting axis  208  in the direction of arrow  213  toward the third member  215 . 
         [0157]    Referring to  FIG. 8 , the folding anchor of  FIG. 7  the first member  207  has passed the thickness of the panel and has reached the space behind the panel, it is being rotated in the direction of arrow  212  toward the second member  201 . 
         [0158]    Referring to  FIG. 9 , the first member  207  of the folding anchor of  FIG. 7  has completed its rotation and it is in its final position relatively to the second member  201 . The sub-member  205  was rotated by pivoting axis  204  by about  90  degrees and became about perpendicular to the second member  201 . The second member  201  had not passed the thickness of the panel and therefore, it was not rotated yet. 
         [0159]    Referring to  FIG. 10 , the folding anchor of  FIG. 7  after the second member  201  has passed the thickness of the panel and has reached the space behind the panel, it is being rotated towards the third member  215 . 
         [0160]    Referring to  FIG. 11 , the folding anchor of  FIG. 7  is in its final folded position. 
         [0161]    Referring to  FIG. 12 , the folding anchor of  FIG. 7  is constructed somewhat differently. The sub-members  217  and  218  are branching out of the second member in the directions of arrow  219  and  220  respectively. 
         [0162]    Referring to  FIG. 13 , the first member  301  of the folding anchor comprises a fastening receiver  308 . The first member  301  is coupled to the second member  303  by a pivoting axis  302 . The first member  301  is rotating side-to-side to the second member  303 , which allows an overlap rotation. This allows the frontal surface of the first member  301  to reach the back surface of the panel (not shown). Means for mounting the last member into the insertion hole are represented by disc  305 . A conduit  307  for the insertion of a fastening rod is shown. 
         [0163]    Referring to  FIG. 14 , the folding anchor of  FIG. 13 , the first member  301  has passed the thickness of the panel and has reached the space behind the panel and it is being rotated by pivoting axis  302  in the direction of arrow  306 . 
         [0164]    Referring to  FIG. 15 , the folding anchor of  FIG. 13  is in its final folded position wherein the conduit  307  is aligned with the fastening receiver  306 . 
         [0165]    Referring to  FIG. 16 , the first member  401  of the folding anchor comprises a fastening receiver  407 . The first member is coupled to the second member  402  by a pivoting axis  403 . The second member  402  is made of two bended wires having some elastic properties. The first member  401  is rotating side-to-side to the second member  402 . This allows the frontal surface of the first member  401  to reach the back surface of the panel (not shown). A spring  404  powers the rotation of the first member  401 , however this rotation could be achieved by gravity alone. Means for mounting the last member into the insertion hole are represented by ring  405  and disc  406 . A conduit  409  for the insertion of a fastening rod is shown. 
         [0166]    Referring to  FIG. 17 , the folding anchor of  FIG. 16  is in its final folded position wherein the conduit  409  is aligned with the fastening receiver  407 . 
         [0167]    Referring to  FIG. 18 , the folding anchor of  FIG. 16  is in its final folded position wherein the panel  410  is shown and the mounting means is mounted into the insertion hole. The frontal surface of the first member  401  lays on the back surface of the panel  410 . The elastic properties of the second member  402  are used to press on the first member  401  against the back surface of the panel  410 . 
         [0168]    Referring to  FIG. 19 , the folding anchor of  FIG. 1  having means for triggering release of members to fold. The members of the folding anchor are locked in an unfolded position and upon release of the triggering means, members of the folding anchor rotate to their final position. The triggering means in  FIG. 19 , is represented by a pull-rod  112  that is pulled back in the direction of arrow  113 . As the first member  104  is released, it rotates toward the second member  101 . 
         [0169]    Referring to  FIG. 20 , the pull-rod  112  of the folding anchor of  FIG. 19  is further pulled back in the direction of arrow  113 . The first member  104  has completed its rotation toward the second member  101  and the second member  101  is rotating toward the third member  106 . Referring to  FIG. 21 , the first member  509  of the folding anchor comprises a fastening receiver  502 . Notice that the wire part of member  509  may not participate in transmittal of pulling forces from the fastening receiver  502  via member  501  to the back surface of the panel. The first member  509  is coupled to the second member  501  by a pivoting axis  508 . The second member  501  is coupled to the third member  504  by a pivoting axis  503 . The second member  501  is rotating side-to-side to the third member  504 . This allows the frontal surface of the second member  501  to reach the back surface of the panel (not shown). Means for mounting the last member into the insertion hole are represented by ring  505  and disc  506  of the third member  504 . A conduit  507  for the insertion of a fastening rod is shown. The fastening rod is inserted through the conduit  507  into means for passage  510  and is fastened into fastening receiver  502 . Referring to  FIG. 22 , the folding anchor of  FIG. 21 , the first member  509  and its fastening receiver  502  have passed the thickness of the panel and have reached the space behind the panel. The first member  509  is being rotated by pivotal axis  508  in the direction of arrow  512 . Means for passage  510  of a fastening rod to be inserted through the conduit  507  and be fastened into fastening receiver  502  is shown. 
         [0170]    Referring to  FIG. 23 , the folding anchor of  FIG. 21  is in its final folded position wherein the conduit  507  is aligned with means for passage  510  and the fastening receiver  502 . 
         [0171]    Referring to  FIG. 24 , the first member of the folding anchor is the fastening receiver  608 . The first member  608  is coupled to the second member  601  by means for repositioning represented by elastic wires  606 . The third member is the means for mounting represented by ring  609  and disc  610 . The second member  601  is coupled to the third member  609  and  610  by means for repositioning represented by elastic wires  605 . The second member  601  is moving side-to-side to the wires of means for repositioning  605 . 
         [0172]    Referring to  FIG. 25 , the folding anchor insertion is done in its unfolded position. The first member, fastening receiver  608  is inserted first and then means for repositioning  606 , then the second member  601  and then means for repositioning  605  in a zigzag fashion. Lastly, the third member ring  609  and disk  610  are mounted into the insertion hole. Another feature shown here is means for preventing of rotation  603  by the threading of the fastening rod. Similar means for preventing rotation can be placed between the fastening receiver and members of the stack, between each two members of the stack and between members and the back surface of the panel. 
         [0173]    Referring to  FIG. 26 , the folding anchor of  FIG. 24 , the first member  608 , means for repositioning  606  and at least half of member  601  have passed the thickness of the panel and have reached the space behind the panel. The first member  608  repositioned back to its folded position. 
         [0174]    Referring to  FIG. 27 , the first member  704  of the folding anchor comprises a fastening receiver  705 . The first member  704  is coupled to the second member  701  by means for repositioning, elastic connectors  703 . The third member is the means for mounting represented by ring  707  and disc  708 . The second member  701  is coupled to the third member, ring  707  and disc  708 , by elastic connectors  706 . The second member  601  is moving side-to-side to elastic connectors  706 . 
         [0175]    Referring to  FIG. 28 , the folding anchor insertion is done in its unfolded position. The first member, the fastening receiver  704 , is inserted first, and then means for repositioning  703 , then the second member  601 and then means for repositioning  706  in a zigzag fashion. Lastly, the last member ring  707  and disc  708  are mounted into the insertion hole. 
         [0176]    Referring to  FIG. 29 , the first member  801  of the folding anchor comprises a fastening receiver  806 . The first member  801  is coupled to the second member  802  by means for repositioning in the form of elastic connectors  805 . The second member comprises means for mounting represented by ring  803  and disc  804 . Means for preventing non-flushed seating of the stack on the back surface of the panel is represented by space  808  created around the mounting ring  803 . This space may contain excess panel material that was pushed backwards by hasty and forceful drilling of the insertion hole. 
         [0177]    Referring to  FIG. 30 , the folding anchor insertion is done in its unfolded position. The first member  801  and its fastening receiver  806 , is inserted first, and then means for repositioning  805 , then the second member  802  in a zigzag fashion. Lastly, ring  803  and disc  804  are mounted into the insertion hole.