Patent Publication Number: US-2023147265-A1

Title: Door security device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is not related to any other patent or pending application. 
     FIELD OF THE INVENTION 
     The present disclosure relates to door mechanical security devices. 
     BACKGROUND OF THE INVENTION 
     Many commercial buildings include one-way, out-swing exterior doors. Most are constructed of steel, although other materials may be used. The out-swing operation of exterior doors often complies with building codes and best practices for fire safety. Out-swing doors are often equipped with a panic bar to provide ready egress during a fire or other emergency, when people are in the building during regular business hours. 
     Exterior doors are normally locked outside business hours. Nonetheless, buildings with exterior doors mounted for out-swing operation are disproportionately attractive targets for burglars. This is because doors mounted to open in the out-swing direction, when locked, can often be forced open using a pry bar. Locked out-swing doors, even steel doors, often can be pried open by wedging the pry bar or similar tool between the door and door frame. 
     The risk of substantial losses due to burglary when commercial buildings with out-swing exterior doors are locked outside business hours makes it desirable to install both an ordinary electronic security monitoring system in the building and supplemental mechanical security devices for the out-swing doors. Supplemental mechanical security devices may be attached to the door, door frame, or both. 
     For example, U.S. Pat. No. 4,856,831 to Roden Jr. discloses a security support bar that may be bolted to an out-swing door on the interior side, across the door frame, to prevent the door from being opened. This arrangement, however, requires permanent installation of a large bar that defeats, or interferes with, a panic bar arrangement. U.S. Pat. No. 5,364,140 to Rice improves over Roden Jr.. Rice’s device includes a handle, a rod extending across the door, blocking members at the door frame, attachment hardware, and an actuating mechanism. Rice’s device can be used without interfering with ordinary operation of the panic bar during an emergency. Rice’s mechanism, however, is even larger than Roden Jr.’s security support bar. 
     In view of the preceding, need exists for improved door security devices for out-swing doors. 
     BRIEF SUMMARY OF THE INVENTION 
     The above-mentioned shortcomings, disadvantages and problems are addressed herein, as will be understood by those skilled in the art upon reading and studying the following specification. This summary is provided to introduce a selection of concepts in simplified form that are further described below in more detail in the Detailed Description. This summary is not intended to identify key or essential features of the claimed subject matter. 
     Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. 
     The present disclosure provides an improved door locking device for securing an out-swing door against forced entry. Apparatus, systems, and methods of varying scope are described herein. These aspects are indicative of various non-limiting ways in which the disclosed subject matter may be utilized, all of which are intended to be within the scope of the disclosed subject matter. In addition to the aspects and advantages described in this summary, further aspects, features, and advantages will become apparent by reference to the associated drawings, detailed description, and claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The novel features believed characteristic of the disclosed subject matter will be set forth in any claims that are filed later. The disclosed subject matter itself, however, as well as a preferred mode of use, further objectives, and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying drawings, wherein: 
         FIG.  1    is an enlarged partial perspective view showing a door locking device in locked position, in use with an out-swing door in an exemplary embodiment. 
         FIG.  2    is an exploded view of the door locking device shown in  FIG.  1   . 
         FIG.  3    is a parts view of the door locking device shown in  FIG.  2   . 
         FIG.  4    is enlarged partial perspective view showing a door exterior surface having a door locking device mounted therein, in an exemplary embodiment. 
         FIGS.  5 - 22    are perspective views showing the door locking device of  FIG.  1    with clasp swing plate in various positions including unlocked uppermost, intermediate, and locked lowermost positions thereof. 
         FIGS.  23 - 32    are perspective views showing aspects of installation of the door locking device of  FIG.  1   . 
         FIGS.  33 - 38    are simplified, schematic partial cross-section views showing the hinge pin vertical axis area of the door locking device of  FIG.  1    with clasp swing plate in various positions including unlocked uppermost, intermediate, and locked lowermost positions thereof. 
     
    
    
     DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS 
     In this detailed description, reference is made to the accompanying drawings which form a part hereof, and in which is shown by way of illustration specific embodiments which may be practiced. Reference now should be made to the drawings, in which the same reference numbers are used throughout the different figures to designate the same components. These embodiments are described in sufficient detail to enable those skilled in the art to practice the embodiments and disclosure. It is to be understood that other embodiments may be utilized, and that logical, mechanical, electrical, and other changes may be made without departing from the scope of the embodiments and disclosure. In view of the foregoing, the following detailed description is not to be taken as limiting the scope of the embodiments or disclosure. 
     The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms “a”, “an”, and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising” or “includes” and/or “including” when used in this specification, specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof. 
     It will be appreciated that for simplicity and clarity of illustration, where considered appropriate, reference numerals may be repeated among the figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the implementations described herein. However, it will be understood by those of ordinary skill in the art that the implementations described herein may be practiced without these specific details. In other instances, well-known methods, procedures and components have not been described in detail so as not to obscure the implementations described herein. Also, the description is not to be considered as limiting the scope of the implementations described herein. 
     The detailed description set forth herein in connection with the appended drawings is intended as a description of exemplary embodiments in which the presently disclosed apparatus and system can be practiced. The term “exemplary” used throughout this description means “serving as an example, instance, or illustration,” and should not necessarily be construed as preferred or advantageous over other embodiments. 
     Illustrated in  FIG.  1    is a partial perspective view showing a door locking device  100  in locked position, in use with an out-swing door  105  in an exemplary embodiment. Door locking device  100  is adapted for securing the out-swing door  105  against forced entry. To aid in ready understanding of the scope and utility of the disclosed subject matter, the out-swing door  105  will be further described. The reference “Parts of a Door Explained” by Diffey, N. (Salisbury Joinery blog dated Nov. 7, 2017) viewed Nov. 2, 2021 at https://www.salisburyjoinery.com/blog/parts-of-a-door-explained, is incorporated by reference in entirety. 
     Out-swing door  105  ( FIG.  1   ) may include a stile mounted to a set of door hinges supported by a door frame  110  ( FIG.  1   ) for pivotal movement about a door hinge vertical axis, between a closed position abutting the door frame  110  and an open position pivoted away from the closed position. The closed position is shown in  FIG.  1   . The set of door hinges is mounted to the door frame  110  and door  105 , for out-swing movement. Door  105  includes a stile extending parallel to the door hinge vertical axis from a bottom rail to a top rail thereof. The door  105  has a lock stile  112  ( FIG.  1   ) opposite the stile. The door  105  has a door body  115  ( FIG.  1   ) including a planar door interior surface  120  ( FIG.  1   ) facing the door frame  110 . Door  105  has a door exterior surface  122  (shown in  FIG.  4   ) facing opposite the interior surface  120  (shown in  FIG.  1   ). The door body  115  has a continuous door peripheral edge  125  extending from the interior surface  120  to the exterior surface in intersecting perpendicular relation thereto. The door peripheral edge  125  includes a door inside edge defined along the stile proximate the door hinge vertical axis. Door peripheral edge  125  includes a door outside edge  130  extending vertically and defined along the lock stile  112  in opposed parallel relation to the door inside edge. Door  105  includes a door handle  140  at the lock stile  112 , which is operable for manual operation. The door frame  110  includes an elongated first jamb extending in the vertical direction in corresponding relationship to the door inside edge, and in the closed position abutting the inside edge. Door frame  110  includes an elongated second jamb  135  extending in the vertical direction in corresponding relationship to the door outside edge  130 , and in the closed position abutting the outside edge. 
     Referring to  FIG.  1   , door  105  may be configured for use with door locking device  100  of this disclosure. Door body  115  may include a first device mounting aperture  140  (shown in  FIG.   24   ) defined in the door body  115 . The first device mounting aperture  140  may extend through the door body  115  to connect the door interior surface  120  with the door exterior surface. The first device mounting aperture  140  may be spaced apart from the door outside edge  130  at a first offset distance in the horizontal direction. 
     As shown in  FIG.  1   , door locking device  110  may include a mounting plate  160  configured to be secured to the door interior surface  120 . Door locking device  100  may include a fastener  165  suitable to secure mounting plate  160  to door body  115  against door interior surface  120 . Although other suitable fasteners  165  may be used, in the illustrated embodiment, fastener  165  may be a suitable first threaded fastener combination  170 . In an exemplary embodiment as shown in  FIG.  1   , first threaded fastener combination  170  may include an elevator bolt  174  which may have a bolt stem having male threads configured for mating threaded engagement with a nut  173  ( FIG.  3   ) having female threads. Door locking device  100  may include a plurality of first minor fasteners  172  suitable to be received in a corresponding plurality of minor apertures  196  ( FIG.  2   ) cooperating to secure mounting plate  160  to door body  115  against door interior surface  120 . 
     As shown in  FIG.  1   , mounting plate  160  may include a first major body  180  having a planar first rear surface  185  configured to abut the door interior surface  120 . First major body  180  may have a planar first front surface  190  disposed in opposed parallel relationship to the first rear surface  185 . Mounting plate  160  may include a first mounting aperture  195  extending through the first major body  180  from the first rear surface  185  to first front surface  190  in perpendicular relationship with the same first front and rear surfaces  185 , 190 . First mounting aperture  195  may be positioned in common axial alignment with the first device mounting aperture  140  ( FIG.  24   ) of the door  105  to receive the first threaded fastener combination  170  extending therethrough. The first threaded fastener combination  170  in the aligned apertures  195 , 140  may extend through door body  115  and the first major body  180  to secure the mounting plate  160  against door body  115  with the first rear surface  185  abutting door interior surface  120 . 
     As shown in  FIG.  1   , mounting plate  160  may have a first outside edge  200  (shown in  FIG.  3   ) may have a vertical axis  201  (shown in  FIG.  3   ) proximate the door outside edge  130  (shown in  FIG.  1   ). Mounting plate  160  may have a set of first receiver ears  210  proximate first outside edge  200 . The set of first receiver ears  210  may be spaced apart along an elongated hinge pin assembly  270  may have a hinge pin vertical axis  275 . The hinge pin vertical axis  275  is spaced from door outside edge  130  and first outside edge  200  of mounting plate  160 . More particularly, it will be understood that first outside edge  200  of mounting plate  160  is proximate continuous door outside interior edge  132  or corner located at intersection of door outside edge  130  with door interior surface  120 . Door outside interior edge  132  extending along a respective vertical axis is continuous. 
     As shown in  FIG.  1   , mounting plate  160  may include a set of first receiver bays  290  spaced apart along hinge pin vertical axis  275  adjacent the set of first receiver ears  210  in alternating relationship with the first receiver ears  210 . Each of the first receiver bays  290  may be defined adjacent a corresponding first receiver ear  210 . In the alternative, the first receiver bays  290  may be defined between two adjacent first receiver ears  210 , which may include an upper adjacent and lower adjacent of the first receiver ears  210  located on opposite upper and lower sides of first receiver bay  290  therebetween. The set of first receiver bays  290  may be configured to receive in mating relationship a corresponding set of second receiver ears  610  of an adjacent clasp swing plate  560 . The set of second receiver ears  610  may dock in the set of first receiver bays  290  in registration relationship therewith. 
     As shown in  FIG.  1   , first receiver ears  210  may extend from first major body  180  of mounting plate  160  in integral fixed relationship therewith. Each of the first receiver ears  210  may include a proximal portion  215  adjoining first major body  180  of mounting plate  160  proximate first outside edge  200  and first front surface  190  thereof. Each of the first receiver ears  210  may include a distal portion  220  spaced from the proximal portion  215  thereof and generally spaced in a lateral direction from first outside edge  200 . Each of first receiver ears  210  may include first receiver wall  222  extending to the distal portion  220  from proximal portion  215  and returning from distal portion  220  to proximal portion  215 . The first receiver wall  222  defines a first receiver aperture  235  intermediate the distal portion  220  and proximal portion  215 . The first receiver wall  222  may have a continuous tubular first receiver inner surface  239  spaced from a first receiver aperture vertical axis  250  in equidistant relationship therefrom, defining a first receiver aperture  235  having a first receiver wall inner radius. The first receiver wall  222  may include continuous first receiver wall outer surface  237  disposed in spaced opposed relationship to the first receiver wall inner surface  239 . The first receiver wall  222  in the vertical direction may extend from a continuous first receiver top surface  240  to a continuous first receiver bottom surface  241  disposed in spaced opposing relationship. The first receiver wall  222  may terminate at the continuous first receiver top surface  240 . The first receiver top surface  240  may extend from the first receiver wall outer surface  237  to first receiver wall inner surface  239  in perpendicular intersecting relationship therewith. The first receiver top surface  240  may intersect the first receiver wall outer surface  237  at a continuous first top surface outer edge  242  spaced from the first receiver aperture vertical axis  250  in equidistant relationship at a first receiver wall outer radius. The first receiver wall top surface  250  may intersect the first receiver wall inner surface  239  at a continuous first top surface inner edge  243  spaced from the first receiver aperture vertical axis  250  in equidistant relationship at the first receiver wall inner radius. 
     As shown in  FIG.  1   , the first receiver wall top surface  240  in a direction perpendicular to the first receiver aperture vertical axis  250  may have a first receiver top surface primary width between the first top surface inner edge  243  and the first top surface outer edge  242 , which is a difference between the outer radius and inner radius of first receiver wall  222 ; 
     As shown in  FIG.  1   , the first receiver wall bottom surface  241  may be disposed in spaced opposed relationship to the first receiver wall top surface  240 . The first receiver wall  222  may have a substantially uniform width from the first receiver wall top surface  240  to the first receiver wall bottom surface  241 . The first receiver wall bottom surface  241  may have a first receiver wall bottom surface primary width between a first bottom surface inner edge  244  and first bottom surface outer edge  247  which is the difference between the first receiver wall outer radius and the first receiver wall inner radius. 
     As shown in  FIGS.  1 ,  2  and  3    the first receiver wall top surface  240  may include a major rest  248  proximate the first front surface  190  of the first major body  180  of mounting plate  160 . The major rest  248  may have a major rest height that defines maximum height of the first receiver wall  222  to support the clasp swing plate  560  at uppermost position thereof in relation to mounting plate  160 . The major rest  248  at a second receiver wall bottom surface  641  of clasp swing plate  560  may provide supporting engagement with second receiver ears  610  at uppermost position of same, and thus may support clasp swing plate  560  at uppermost position thereof, when clasp swing plate  560  is pivoted to unlocked position and aligned in abutting relationship at substantially zero degrees (0°) in relation to said mounting plate  160 . 
     As shown in  FIGS.  1 ,  2  and  3    the first receiver wall top surface  240  may include an elongated vertical first locking channel  251  defined in first receiver wall  222  proximate hinge pin vertical axis  275  at substantially ninety degrees (90°) in relation to mounting plate  160 . The first locking channel  251  may interrupt the first receiver wall  222 , to form an empty, open gap in the first receiver wall  222 . The first locking channel  251  may be sized to receive therein a first proximal portion  615  or neck of corresponding second receiver wall  622  of second receiver ear  610  in lowermost position (shown in  FIG.  1   ) thereof, when clasp swing plate  560  in corresponding lowermost position is rotated about hinge pin vertical axis  275  to locked position in perpendicular relationship at substantially ninety degrees (90°) in relation to mounting plate  160 . The first locking channel  251  at first locking channel bottom wall  252  defining minimum height thereof may provide supporting engagement with second receiver wall bottom surface  641  of second receiver ear  610  at lowermost position (shown in  FIG.  1   ) of same, and thus may support clasp swing plate  560  at lowermost position (shown in  FIG.  1   ) in relation to mounting plate  160 , when clasp swing plate  560  is pivoted to locked position (shown in  FIG.  1   ) and aligned in securing relationship with door frame anchor bolt  320 , in perpendicular relationship at substantially ninety degrees (90°) in relation to mounting plate  160 . 
     As shown in  FIG.  10   , the first receiver wall top surface  240  may include an elongated declined slide surface  340  extending from first transition  343  at first major rest  248  at maximum height of first receiver wall top surface  240  downward to second transition  346  at second transition height of first receiver wall top surface  240 , where the second transition height is determined to enable corresponding second receiver ear  610 , by force of gravity on second receiver ear  610 , to pass downward from the upper end of declined slide surface  340  at first transition  343  and across declined slide surface  340  to clear second transition  346 , and then to drop in first locking channel  251  to rest on first locking channel bottom wall  252  thereof when clasp swing plate  560  pivots through a range of travel which is about ninety degrees (90°) about hinge pin vertical axis  275 , from unlocked position in the uppermost position in abutment at substantially zero degrees (0°) in relation to mounting plate  160 , to locked position in the lowermost position perpendicular at at substantially ninety degrees (90°) in relation to mounting plate  160 . The first declining slide surface  340  at the first lower second transition  346  may introduce the second proximal portion  615  or neck of the second receiver ear  610  into the vertical first locking channel  251 . Referring to  FIG.  3   , the first locking channel  251  may interrupt the first receiver wall  222 , to form an empty, open gap in the first receiver wall  222 . The first locking channel  251  may be sized to receive therein a first proximal portion  615  or neck of corresponding second receiver wall  622  of second receiver ear  610  in lowermost position thereof, when clasp swing plate  560  in corresponding lowermost position is rotated about hinge pin vertical axis  250  to locked position in perpendicular relationship at substantially ninety degrees (90°) in relation to mounting plate  160 . The first locking channel  251  by cooperation of first locking channel major wall  253 , opposed first locking channel upper minor wall  255  and lower minor wall  254 , and locking channel bottom wall  252 , engage the second receiver ear  610  to secure the clasp swing plate  560  in locked position, substantially perpendicular to mounting plate  160 , in lowermost position in relation to mounting plate  160 . Force of gravity biases the second receiver ear  610  and clasp swing plate  560  to move into, and to be retained, the lowermost position when clasp swing plate  560  is pivoted to locked position and aligned in perpendicular relationship at substantially ninety degrees (90°) in relation to the mounting plate  160 . 
     As shown in  FIG.  1   , door locking device  100  may include a door frame anchor assembly  315  configured to be mounted to the second jamb  135  of door frame  110 . The door frame anchor assembly  315  may include a door frame anchor mounting plate  320  configured to be secured to the second jamb  135  to support a door frame anchor bolt  330 . Door frame anchor mounting plate  320  may include a spaced plurality of minor mounting apertures  325  configured to receive corresponding threaded screws  335  to fix the door frame mounting plate  320  against the second jamb  135 . Door frame anchor mounting plate  320  may include a primary aperture  340  having female threads and configured for mating threaded engagement with a door frame anchor bolt  330  having male threads  333  for such mating threaded engagement. The door frame anchor bolt  330  includes an enlarged anchor bolt head  334  and adjoined bolt stem  332  having male threads. The door frame anchor assembly  315  includes an anchor bolt setting nut  333  for setting length of door frame anchor bolt  330  in relation to major anchor aperture  323  having female threads defined in door frame anchor plate  320  for receiving the door frame anchor bolt  330  in mating threaded engagement therewith. 
     Referring to  FIG.  1   , enlarged anchor bolt head  345  has a cross-sectional size greater than adjoining anchor bolt stem  346  cross-sectional size. The anchor bolt head  345  is located at a clasp cut-out height determined for the anchor bolt head  345  to be received in a clasp cutout  561  of the clasp swing plate  560 . The anchor bolt head  345  is located at a clasp cut-out horizontal offset distance, in relation to the hinge pin vertical axis  250 , determined for the anchor bolt head  345  to be received in the clasp cutout  561  of the clasp swing plate  560 . 
     Referring to  FIG.  1   , the clasp swing plate  560  is configured for releasable secured engagement with the door frame anchor assembly  315 . Referring to  FIG.  1   , the clasp swing plate  560  includes second major body  580  including second front surface  590  disposed in opposition to second rear surface  585 . Clasp swing plate  560  may include a plurality of second receiving ears  610  similar to first receiving ears  210 , except having a respective second receiver wall top surface  240  that is flat and has uniform height. Clasp swing plate  560  may include a plurality of second receiving bays  690  similar to first receiving bays  290 , except having a respective second receiver bay top surface and bottom surface that are flat and have uniform height. Clasp cut-out  561  extends through second major body  580  between second front surface  590  and second rear surface  585  to define clasp cut-out aperture  563  having lower major region  564  in open communication with upper minor region  566 . The clasp swing plate  560  is configured for vertical translation movement in relation to the door frame anchor bolt  320 . The clasp swing plate  560  may move between an unlocked, uppermost position (shown in  FIGS.  5 ,  6 ,  8 ,  9 ,  11 ,  22 ,  29 ,  30 ,  33  and  36   ) pivoted substantially parallel at substantially zero degrees (0°) in relation to the mounting plate  160  where a first major rest  248  of a first receiver ear  210  supports the clasp swing plate  560  in the uppermost position relative to a hinge pin vertical axis  250  and mounting plate  160 ; and a locked, lowermost position (shown in  FIGS.  1 ,  7 ,  10 ,  16 ,  17 ,  27 ,  28 ,  35  and  38   ) pivoted substantially perpendicular at substantially ninety degrees (90°) in relation to the mounting plate  160  where a first locking channel bottom wall  252  supports the clasp swing plate  560  in the lowermost position relative to the hinge pin vertical axis  250  and mounting plate  160 . The clasp swing plate  560 , when pivoted about the hinge pin vertical axis  250  to substantially perpendicular at substantially ninety degrees (90°) in relation to the mounting plate  160 , which positions the clasp swing plate  560  substantially perpendicular to the door frame anchor bolt  330  to be secured in anchoring engagement with the door frame anchor bolt  330 , is biased by force of gravity to move to the lowermost position to receive only the anchor bolt stem  332  in an upper minor region  566  of an anchor bolt aperture  563  defined by a clasp cut-out  561 , and to be positively retained in the lowermost position by force of gravity until manually raised by a user to the uppermost position. The clasp swing plate  560 , remaining in the same position pivoted at substantially ninety degrees (90°) in relation to the mounting plate  160  and thus positioned substantially perpendicular to the door frame anchor bolt  330  to be secured in anchoring engagement with the door frame anchor bolt  330 , may be connected to the door frame anchor bolt  330 , or removed from connection to the same, by a user manually raising the clasp swing plate  560  from the lowermost position to the uppermost position that aligns a lower major region  566  of the anchor bolt aperture  563  defined by the clasp cut-out  561  with the door frame anchor bolt  330  to enable the clasp cut-out  561  to clearing and receive, or clear and be removed from, the enlarged anchor bolt head  334 . 
     The clasp cut-out  561  defines a clasp anchor bolt aperture  563  having a lower major region  564  adjoining an upper minor region  566  in open communication. The lower major region  564  is configured to clear and receive the enlarged anchor bolt head  334  of door frame anchor bolt  330  when the clasp swing plate  560  occupies the uppermost position relative to the door frame anchor assembly  315 . The upper minor region  566  is configured to receive only the anchor bolt stem  332  of door frame anchor bolt  330 , without clearing the enlarged anchor bolt head  334 , when the clasp swing plate  560  occupies the lowermost position relative to the door frame anchor assembly  315  and mounting plate  160 . The clasp cut-out  561  is located at the clasp cut-out horizontal offset distance determined for the clasp cut-out  561  at the uppermost position to clear and receive the enlarged anchor bolt head  334 , and for the clasp cut-out  561  at the lowermost position to receive the anchor bolt stem  332  without clearing the enlarged anchor bolt head  334 . The clasp swing plate  560  is biased by force of gravity for vertical translation movement to the lowermost position from the uppermost position when extending toward the anchor bolt at substantially ninety degrees (90°) in relation to the mounting plate  160 . The clasp swing plate  560  is retained in the lowermost position by the gravity biasing force to lock the clasp swing plate  560  in locking, anchored relationship with the door frame anchor bolt  330 . The clasp anchor bolt aperture  563  defined by clasp cut-out  561  at the upper minor region may receive only the anchor bolt stem  332  in registration relationship when captured behind the enlarged anchor bolt head  334 . The clasp swing plate  560  may be disconnected and removed from the position captured behind the enlarged anchor bolt head  334  only when manually raised by a user exceeding the positive biasing force of gravity that positively retains the clasp swing plate in the lowermost position, captured behind the enlarged anchor bolt head  334 . 
     Apparatus, methods and systems according to embodiments of the disclosure are described. Although specific embodiments are illustrated and described herein, it will be appreciated by those of ordinary skill in the art that any arrangement which is calculated to achieve the same purposes can be substituted for the specific embodiments shown. This application is intended to cover any adaptations or variations of the embodiments and disclosure. For example, although described in terminology and terms common to the field of art, exemplary embodiments, systems, methods and apparatus described herein, one of ordinary skill in the art will appreciate that implementations can be made for other fields of art, systems, apparatus or methods that provide the required functions. The invention should therefore not be limited by the above-described embodiments, methods, and examples, but by all embodiments and methods within the scope and spirit of the invention. 
     In particular, one of ordinary skill in the art will readily appreciate that the names of the methods and apparatus are not intended to limit embodiments or the disclosure. Furthermore, additional methods, steps, and apparatus can be added to the components, functions can be rearranged among the components, and new components to correspond to future enhancements and physical devices used in embodiments can be introduced without departing from the scope of embodiments and the disclosure. One of skill in the art will readily recognize that embodiments are applicable to future systems, future apparatus, future methods, and different materials. 
     All methods described herein can be performed in a suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., “such as”), is intended merely to better illustrate the disclosure and does not pose a limitation on the scope of the disclosure unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the disclosure as used herein. Terminology used in the present disclosure is intended to include all environments and alternate technologies that provide the same functionality described herein.