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CROSS REFERENCE TO RELATED APPLICATION 
     The present application claims the benefit of U.S. Provisional Patent Application Ser. No. 61/782,542, filed Mar. 14, 2013, entitled ENERGY ABSORBING LOCK SYSTEMS AND METHODS, the disclosure of which is hereby incorporated by reference in its entirety. 
    
    
     BACKGROUND 
     Exterior doors of homes, office buildings, hotels, apartment buildings, etc. are typically equipped with some means (e.g., a door lock) of securing entry into the building. Interior doors of such buildings may also be equipped with some means of securing the door. Such door lock apparatuses are typically rigid and mechanical and to some extent easily defeated by a sudden and forceful action, such as kicking or shouldering. An average adult male is capable of generating a significant amount of force over an effective area of the door lock while using a violent swift action directed at the door lock. In instances of forced entry through the door, the more direct a strike is directed to the door lock, the more successful a perpetrator is at defeating the door lock, typically. 
     SUMMARY 
     According to certain aspects of the present disclosure, a door lock assembly is adapted to secure a door in a closed configuration within a doorframe. The door lock assembly includes a bolt guide, a bolt, a bolt actuator, and a bolt receiver. The bolt extends between a proximal end and a distal end. The bolt includes a first portion that is adjacent to the proximal end and a second portion that is adjacent to the distal end. The bolt actuator is adapted to move the bolt along the bolt guide between a locked position and an unlocked position. The second portion of the bolt extends beyond the bolt guide when the bolt is moved to the locked position. The bolt receiver is adapted to receive the second portion of the bolt when the bolt is moved to the locked position. The bolt is adapted to deform within the bolt receiver and thereby absorb energy delivered to the door lock assembly by an intrusion load. The energy delivered to the door lock assembly by the intrusion load is predominantly absorbed by deformation of the bolt. 
     In certain embodiments, the bolt is a deadbolt. The bolt actuator may be actuated by a key via a keyhole of the door lock assembly. The bolt receiver may include an integral strike plate. The bolt receiver may be a cup shaped bolt receiver and may be adjacent the second portion of the bolt along at least three sides of the second portion of the bolt when the bolt is moved to the locked position. The cup shaped bolt receiver may be adjacent the second portion of the bolt along all exterior sides of the second portion of the bolt when the bolt is moved to the locked position. The bolt receiver may include a first portion that is adapted to receive the second portion of the bolt when the bolt is moved to the locked position and no intrusion load is placed on the door. The bolt receiver may include a second portion adapted to receive at least some of the second portion of the bolt when the bolt is positioned at the locked position and the intrusion load is placed on the door thereby deforming the bolt. 
     In certain embodiments, the second portion of the bolt receiver may include a deformation guide that guides the deformation of the bolt when the intrusion load is placed on the door. The deformation guide of the second portion of the bolt receiver may include a taper. The deformation of the bolt may be elastic deformation and/or may be inelastic deformation (i.e., may result in yielding of the bolt). The bolt guide may be mounted to the door and the bolt receiver may be mounted to the doorframe. In other embodiments, the bolt guide may be mounted to the doorframe and the bolt receiver may be mounted to the door. 
     In certain embodiments, the bolt may include a spring metal core that is surrounded by an energy absorbing polymer. The bolt may further include a metal end cap at the distal end that is connected to the spring metal core. The bolt guide may include a deformation guide that guides the deformation of the bolt when the intrusion load is placed on the door. 
     According to other aspects of the present disclosure, a door lock assembly is adapted to secure a door in a closed configuration within a doorframe. The door lock assembly includes a bolt guide, a bolt, a bolt actuator, and a bolt receiver. The bolt extends between a proximal end and a distal end. The bolt includes a first portion that is adjacent to the proximal end, a second portion that is adjacent to the distal end, and a thickness. The bolt actuator is adapted to move the bolt along the bolt guide between a locked position and an unlocked position. The second portion of the bolt extends beyond the bolt guide when the bolt is moved to the locked position. The bolt receiver is adapted to receive the second portion of the bolt when the bolt is moved to the locked position. The bolt is adapted to deform within the bolt receiver and thereby absorb energy delivered to the door lock assembly by an intrusion load. A maximum deformation of the bolt prior to failure of the door lock assembly from the intrusion load is at least 4% of the thickness of the bolt. In certain embodiments, the maximum deformation of the bolt prior to the failure of the door lock assembly is at least 25% of the thickness of the bolt. In certain embodiments, the maximum deformation of the bolt prior to the failure of the door lock assembly is at least 120% of the thickness of the bolt. 
     Still other aspects of the present disclosure are directed to a door lock assembly that is adapted to secure a door in a closed configuration within a doorframe. The door lock assembly includes a bolt guide, a bolt, a bolt actuator, and a bolt receiver. The bolt extends between a proximal end and a distal end. The bolt includes a first portion that is adjacent to the proximal end, a second portion that is adjacent to the distal end. The bolt actuator is adapted to move the bolt along the bolt guide between a locked position and an unlocked position. The second portion of the bolt extends beyond the bolt guide when the bolt is moved to the locked position. The bolt receiver is adapted to receive the second portion of the bolt when the bolt is moved to the locked position. The bolt is adapted to deform within the bolt receiver and thereby absorb energy delivered to the door lock assembly by an intrusion load. A maximum deformation of the bolt prior to failure of the door lock assembly from the intrusion load is at least 40% of a maximum overall deflection of the door lock assembly. In certain embodiments, the maximum deflection of the bolt prior to the failure of the door lock assembly is at least 55% of the maximum overall deflection of the door lock assembly. In certain embodiments, the maximum deflection of the bolt prior to the failure of the door lock assembly is at least 72% of the maximum overall deflection of the door lock assembly. 
     Yet other aspects of the present disclosure are directed to a door lock assembly that is adapted to secure a door in a closed configuration within a doorframe. The door lock assembly includes a bolt guide, a deformable bolt, a bolt actuator, and a bolt receiver. The deformable bolt extends between a proximal end and a distal end. The deformable bolt includes a first portion that is adjacent to the proximal end, a second portion that is adjacent to the distal end. The bolt actuator is adapted to move the deformable bolt along the bolt guide between a locked position and an unlocked position. The second portion of the deformable bolt extends beyond the bolt guide when the deformable bolt is moved to the locked position. The bolt receiver is adapted to receive the second portion of the deformable bolt when the deformable bolt is moved to the locked position. The bolt receiver includes a deformation guide that is adapted to guide deformation of the deformable bolt. 
     A variety of additional aspects will be set forth in the description that follows. These aspects can relate to individual features and to combinations of features. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the broad concepts upon which the embodiments disclosed herein are based. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a partial exploded perspective view of a door lock system according to the principles of the present disclosure; 
         FIG. 2  is a partial reverse perspective view of the door lock system of  FIG. 1 ; 
         FIG. 3  is a partial exploded elevation view of the door lock system of  FIG. 1 ; 
         FIG. 4  is a partial exploded cross-sectional plan view of the door lock system of  FIG. 1 , as called out at  FIG. 3 ; 
         FIG. 5  is a partial exploded plan view of the door lock system of  FIG. 1 ; 
         FIG. 6  is a partial exploded cross-sectional elevation view of the door lock system of  FIG. 1 , as called out at  FIG. 5 ; 
         FIG. 7  is a partial cross-sectional plan view of the door lock system of  FIG. 1 , shown in a normally closed configuration; 
         FIG. 8  is the partial cross-sectional plan view of  FIG. 7 , but with the door lock system shown in a deformed configuration; 
         FIG. 9  is a partial cross-sectional plan view of the door lock system of  FIG. 1 , shown in the normally closed configuration; 
         FIG. 10  is the partial cross-sectional plan view of  FIG. 9 , but with the door lock system shown in a deformed bolt-jamming configuration; 
         FIG. 11  is a cross-sectional plan view of a portion of the door lock system of  FIG. 1 , shown in the normally closed configuration; 
         FIG. 12  is a cross-sectional plan view of the door lock system of  FIG. 1 , shown in the deformed configuration; 
         FIG. 13  is a partial perspective view of another door lock system according to the principles of the present disclosure; and 
         FIG. 14  is an elevation view of a strike plate suitable for use with the door lock system of  FIG. 13 . 
     
    
    
     DETAILED DESCRIPTION 
     According to the principles of the present disclosure an energy absorbing lock system  100 , and in particular, a system including an energy absorbing bolt  140  (e.g., an energy absorbing deadbolt) is effective at preventing entry through a door  200  by dynamic action that is applied to the door  200 . Such dynamic action may include kicking with a foot, shouldering with a shoulder, and ramming with a police-style battering ram. In contrast, typical conventional bolt-style lock systems and typical conventional latch systems are susceptible to failure from application of such dynamic action, thereby allowing entry through the door. 
     In various embodiments, the energy absorbing bolt  140  may be made of various energy absorbing materials and/or deformable materials. The energy absorbing materials and/or the deformable materials may include energy absorbing plastics (e.g., polycarbonate, PVC, etc.), energy absorbing rubbers (neoprene, isoprene, etc.), energy absorbing composites, etc. In one embodiment, the energy absorbing bolt  140  includes 60 durometer PVC. In another embodiment, the energy absorbing bolt  140  includes 50 durometer PVC. 
     The typical bolt-style lock systems and the typical latch systems are substantially inflexible and have minimal energy absorption qualities. Energy that is applied to the door by the dynamic action is concentrated upon a connection between a deadbolt and strikeplate in the case of the typical bolt-style lock system and is concentrated upon a connection between a latch and a catch in the case of the typical latch system. The typical latch system and the typical bolt-style lock system may be included on the same door and offer a modest amount of improvement in preventing entry as the dynamic action causes failure of both the typical latch system and the typical bolt-style lock system. The failure of the typical latch system and/or the typical bolt-style lock system may or may not occur from failure of the deadbolt and/or the strikeplate, in the case of the typical bolt-style lock system, and/or failure of the latch and/or the catch, in the case of the typical latch system. The failure of the typical latch system and/or the typical bolt-style lock system may or may not occur from failure of connecting structure (e.g. the door, a connection between the door and the bolt-style lock system, a doorframe, a connection between the doorframe and the bolt-style lock system, a connection between the door and the latch system, a connection between the doorframe and the latch system, etc.). As, the typical latch system and the typical bolt-style lock system are substantially inflexible, the energy delivered by the dynamic action may result in impact of relatively short time duration and relatively high force levels. The high force levels may cause high stresses to develop in the above-mentioned parts and the high stresses may cause the failure. 
     In contrast, according to the principles of the present disclosure, the energy absorbing lock system  100  includes the deformable bolt  140  that is substantially flexible. The energy delivered by the dynamic action may result in impact of relatively long time duration and relatively low force levels. The relatively low force levels may result in lower stresses developing in corresponding parts and the lower stresses may be below a failure point. In addition, the deformable bolt  140  absorbs the energy delivered by the dynamic action and may dissipate the energy as heat. 
     The energy absorbing lock system  100  is therefore a device designed to absorb and thwart the concentrated energy of an attempted forced entry through the door  200  or a similar access point. When a perpetrator places a sudden force onto the door, the substantially rigid mechanisms of the typical bolt-style lock system and/or the typical latch system designs often fail due to their inability to absorb the energy. The energy absorbing lock system  100  will, in most cases, absorb the energy and return the door  200  to its original position. In cases where there are only substantially rigid mechanisms, repeated blows often weaken (e.g., fatigue, cause crack initiation and crack growth, etc.) the lock/latch assemblies and the door/doorframe until a point of failure is reached. The energy absorbing lock system&#39;s  100  absorption qualities continue to function after repeated blows. 
     Extensible material is used in the deformable bolt  140 . In certain embodiments, the extensible material is neoprene and/or isoprene. As depicted, the extensible material may be formed into the deformable bolt  140 . A proximal end  142  of the extensible material may be operably connected (e.g., molded) to an actuator  180  (e.g., a conventional metal actuator) of the energy absorbing lock system  100 . A key and/or other rotating input may actuate the deformable bolt  140  between a locked configuration and an unlocked configuration. 
     A bolt receiver  220  (i.e., a female portion) is separate from a deformable bolt and actuator assembly  110 . The bolt receiver  220  may be a single piece (e.g., a steel piece, a formed piece, a forged piece, and/or a solid piece, etc.) that includes a deformation guiding portion  230  (see  FIGS. 9 and 10 ). The bolt receiver  220  may be secured directly to a doorframe  300 . The bolt receiver  220  may be secured directly to the doorframe  300  at a jamb  310  of the doorframe  300 . The energy from the sudden blow is expended, absorbed, and/or dissipated as the deformable bolt  140  is bent, stretched, and/or compressed. The bending, stretching, and/or compressing of the deformable bolt  140  may be guided, at least in part, by the deformation guiding portion  230 . The bending, stretching, and/or compressing of the deformable bolt  140  may cause a recoiling effect and urge and/or force the door  200  back to its original position. 
     A metal insert  160  may be provided in the deformable bolt  140 . The metal insert  160  may be made of spring steel. The metal insert  160  may connect to the actuator  180 . A cap  170  may be provided at a distal end  144  of the deformable bolt  140 . The cap  170  may connect to the metal insert  160 . The metal insert  160  may provide tensile reinforcement to the deformable bolt  140 . The metal insert  160  may provide a tensile connection between the actuator  180  and the cap  170 . 
     The energy absorbing lock system  100  will absorb considerably more energy than the conventional deadbolt system, often made of some form of steel. As the conventional deadbolt system includes primarily rigid components, repeated blows typically weaken the lock assemblies, the door, and/or the doorframe until it a point of failure is reached. The energy absorbing lock system  100  functions after repeated blows. 
     In certain embodiments, the deformable bolt  140  of the energy absorbing lock system  100  is similar to the form and function of a conventional steel deadbolt found on residential and/or commercial business doors  200 . However, the materials used in the construction may be substantially different. In certain embodiments, the deformable bolt  140  (e.g., the deadbolt) is constructed of a hardened steel spine  160  (e.g., a spring steel spine) of about 0.025 to about 0.070 inch thickness that is secured to a steel end cap  170  that is about 3/16 inch thick. The hardened steel spine  160  is then covered with a neoprene or an isoprene materiel to create a body of the deformable bolt  140 . In other embodiments, the hardened steel spine  160  and/or the steel end cap  170  may be omitted. 
     The bolt receiver  220  (i.e., the female structure) may be composed of all steel and fit into an opening  320  of the jamb  310  where a conventional female receiver from a conventional deadbolt system fits into the door frame  300 . However, in certain embodiments, the bolt receiver  220  fully lines the opening  320  thus forming a hollow cavity  226  (e.g. a pocket made of steel). The bolt receiver  220  may include an exterior plate  224  (see  FIG. 1 ) with outside dimensions of 2¼ inch×1 inch, which are industry standards in the United States. The exterior plate  224  may have two holes  236  for screws  238  that may be of standard diameter. The female opening  226  may have an industry standard height of ¾inch and may include a typical semi-half oval form  228  on opposing top and bottom ends. 
     A difference between the typical face plate and the bolt receiver  220  may be found at a side  222  (see  FIG. 10 ) of the female opening  226  that first receives the deformable bolt  140 . It may be wider at this point (e.g., ¾inch) than the standard opening (⅝ inch) at the face plate  224 , but only slightly wider than the distal male end  144  of the steel end cap  170  of the deformable bolt  140  at a distal end  242  of the hollow cavity  226  (i.e., the hollow opening). A purpose of the narrowing of the cavity  226  may be to allow the deformable bolt  140  to seat in an innermost depth  242  of the cavity  226 . When the door  200  is struck with force, the first point to make contact with the bolt receiver  220  (i.e., the female apparatus) may be the end cap  170  of the deformable bolt  140 . As force is placed on the deformable bolt  140 , it will begin absorbing energy and bending and/or otherwise deforming. While bending, a first side  152  (see  FIG. 9 ) of the deformable bolt  140  will make contact (e.g., bearing contact) along the offset inner wall  230  of the bolt receiver  220  until it reaches an edge  234  of the faceplate  224 . At this point, the deformable bolt  140  will absorb energy while bending the inner hardened steel spine  160 , all while cushioning the blow as the material (e.g., the neoprene material) compresses and/or otherwise deforms. 
     In the event that the perpetrator should continue to repeatedly deliver blows to the door  200 , the deformable bolt  140  may bend, compresses, and/or otherwise deforms in a manner that causes the door  200  to pinch the deformable bolt  140  into the doorframe  300  making thereby jamming the door  200  (see  FIGS. 9 and 10 ). 
     Turning now to  FIGS. 3 ,  5 ,  7 , and  9 , the energy absorbing bolt  140  will be described in detail. As illustrated at  FIG. 5 , the energy absorbing bolt  140  generally defines a thickness t that extends between the first side  152  and a second side  154 . As illustrated at  FIG. 3 , the energy absorbing bolt  140  generally defines a height h that extends between a third side  156  and a fourth side  158 . As illustrated at  FIG. 2 , the third side  156  and the fourth side  158  may include a curved shape and/or a tapered shape. In certain embodiments, the curved shape matches similar shapes of conventional bolts found on conventional door lock assemblies. In certain embodiments, the height h is generally 0.75 inch, and the thickness t is generally 0.625 inch. 
     As mentioned above, the energy absorbing bolt  140  may terminate at a distal end  144 . The cap  170  may define the distal end  144 . In other embodiments, the distal end  144  of the energy absorbing bolt  140  may not include a cap. The general perimeter of the energy absorbing bolt  140  may continue across a thickness of the cap  170 . In particular, the cap  170  may also define the thickness t and the height h. The first side  152 , the second side  154 , the third side  156 , and the fourth side  158  may continue in a smooth and uninterrupted manner across the energy absorbing bolt  140 , including the cap  170 . 
     The energy absorbing bolt  140  extends between the proximal end  142  and the distal end  144 . As depicted at  FIGS. 7 and 9 , the proximal end  142  of the energy absorbing bolt  140  may be positioned a substantial distance away from the end  202  of the door  200  and may be positioned within the door  200 . 
     The energy absorbing bolt  140  includes a first portion  146 , adjacent the proximal end  142 , and a second portion  148 , adjacent the distal end  144 . The proximal end  142  retracts within the bolt guide  190  when the deformable bolt and actuator assembly  110  are in the unlocked position. In particular, the distal end  144  of the energy absorbing bolt  140  may be substantially flush with the end  202  of the door  200 . When the deformable bolt and actuator assembly  110  is moved to the locked configuration, the first portion  146  is slid out of the bolt guide  190  and extends beyond the end  202  of the door  200 . 
     Turning now to  FIGS. 6 ,  9 , and  10 , the bolt receiver  220  will be described in additional detail. In certain embodiments, the bolt receiver  220  is formed of a continuous material and thereby is substantially stronger than a conventional bolt receiver. In certain embodiments, the cavity  226  of the bolt receiver  220  is surrounded on all sides except an opening  227  of the cavity  226 . Thus, the cavity  226  is surrounded by a perimeter of material  225  that generally extends around an axis A defined by the energy absorbing bolt  140  (e.g., as the energy absorbing bolt  140  slides). A bottom  229  of the cavity  226  may be integrally attached to (e.g., one monolithic piece with) the perimeter  225 . The bolt receiver  220  thereby defines a cup-shape structure with a high degree of strength as it is reinforced in every direction by the perimeter  225  and the bottom  229 . 
     The bolt receiver  220  may further include the exterior plate  224  (i.e., the strike plate). The exterior plate  224  may serve as a flange around the perimeter  225  and further strengthen and reinforce the bolt receiver  220 . As depicted at  FIG. 6 , the bolt receiver  220  may include a set of holes  236  through the exterior plate  224 . As depicted at  FIG. 6 , the bottom  229  of the hollow cavity  226  may include another hole  236 . A pair of fasteners  238  (e.g., screws) may attach the exterior plate  224  to the jamb  310  of the door frame  300 . A fastener  240  may secure the bottom  229  of the hollow cavity  226  to the door frame  300 . The fasteners  238  and/or  240  may extend beyond the jamb  310  of the door frame  300  and structurally attach the bolt receiver  220  to a frame of the building. By including the holes  236  and the fasteners  238 ,  240  as illustrated, the bolt receiver  220  is mounted with a high degree of structural stability. In particular, the fasteners  238 ,  240  are positioned in at least two planes that are separated by a distance. In contrast, a conventional strike plate may only fasten to the jamb of the door frame at a single plane. 
     The bolt receiver  220  may include a portion  250  that engages snugly with the energy absorbing bolt  140 . As depicted at  FIG. 9 , the portion  250  is included adjacent the bottom  229  and/or the distal end  242  of the bolt receiver  220 . The distal end  144  of the energy absorbing bolt  140  may engage the portion  250  snugly and thereby give a positive feel to the locking of the door  200  when under normal loading conditions. The positive feel when closing and locking may feel much like the locking of a conventional door lock. The snug fitting between the distal end  144  and the portion  250  does not interfere with and may enhance the overall dynamic deformation characteristic of the energy absorbing lock system  100  when the intrusion load L is placed on the door  200 . In certain embodiments, the cap  170  engages with the portion  250  and thereby provides the energy absorbing lock system  100  with a metal-on-metal interface when the deformable bolt and actuator assembly  110  is positioned to and/or from the locking position. 
     Turning now to  FIGS. 1 and 2 , exploded perspective views illustrate the energy absorbing lock system  100 , as installed on the door  200  and the door frame  300 . As depicted, the deformable bolt and actuator assembly  110  are installed in the door  200 , and the bolt receiver  220  is installed in the door frame  300 . In other embodiments, the deformable lock and actuator assembly  110  may be installed in a door frame, and the bolt receiver  220  may be installed in a door. As depicted, the door  200  is a conventional door found, for example, on residential dwellings, business buildings, school buildings, etc. The door  200  may be made of metal, wood, plastic, composites, etc. In certain embodiments, the door  200  includes a framework inside the door  200 . In such embodiments, the deformable bolt and actuator assembly  110  and/or the energy absorbing bolt  140  may be structurally connected to the framework of the door  200 . In other embodiments, the deformable bolt and actuator assembly  110  and/or the energy absorbing bolt  140  may not be substantially attached to a framework of the door  200 . 
     In certain embodiments, the door  200  is hung from the door frame  300  and pivots about hinge axes that are defined by hinges mounted between the door  200  and the door frame  300 . In certain embodiments, as illustrated at  FIGS. 9 and 10 , the door  200  is constrained to normally open in only one rotational direction. In other embodiments, the door  200  may swing inwardly and outwardly about a door hinge axis and/or about door hinge axes (e.g., about a French door hinge system). 
     As illustrated at  FIGS. 9 and 10 , the energy absorbing bolt  140  fits into the bolt receiver  220  and thereby locks the door  200  in a closed position.  FIG. 9  illustrates the door  200  in a normal locked position.  FIG. 10  illustrates the door  200  in a locked position, but with an intrusion load L applied against the door  200  thereby displacing (e.g., linearly displacing, rotationally displacing, or linearly and rotationally displacing the door  200 ). As illustrated at  FIG. 9 , when the door  200  is in the normally locked position, the energy absorbing bolt  140  occupies a first portion  232  of the bolt receiver  220 . As illustrated at  FIG. 10 , when the intrusion load L is applied to the door  200 , a portion of the energy absorbing bolt  140  occupies a second portion  233  of the cavity  226  of the bolt receiver  220 . The deformation guiding portion  230  may control the deformation of the energy absorbing bolt  140  and may thereby influence the energy absorption of the energy absorbing bolt  140 .  FIG. 8  also shows the energy absorbing bolt  140  occupying the second portion  233  of the cavity  226  of the bolt receiver  220  when the intrusion load L is placed against the door  200 .  FIG. 7  also illustrates the door  200  in the normal locked position with the energy absorbing bolt  140  positioned in the first portion  232  of the cavity  226  of the bolt receiver  220 . 
       FIG. 8  illustrates the energy absorbing bolt  140  absorbing energy by a bending mode. In certain embodiments, this bending mode may be a first mode that the energy absorbing bolt  140  enters while protecting the door  200  and the door frame  300  from the intrusion load L. Upon the intrusion load L increasing in magnitude, the energy absorbing bolt  140  may enter a compression mode (e.g., a pinching mode). By entering the compression mode or a second mode, the energy absorbing bolt  140  may employ additional energy absorbing means to prevent the door  200  from opening under the intrusion load L. These additional energy absorbing means may be used in isolation or together in various combinations with any other energy absorbing means. 
     These energy absorbing means may include the cap  170  contacting the cavity  226  of the bolt receiver  220  thereby placing the metal insert  160  in tension. These energy absorbing means may include a compressing of material of the energy absorbing bolt  140 . In particular, the edge  234  of the cavity  226  of the bolt receiver  220  may initiate substantial compression into the energy absorbing bolt  140 . As illustrated, the edge  234  includes a curved profile (e.g., a radius) that may influence the compression means of absorbing energy by the energy absorbing bolt  140 . In particular, the radius of the edge  234  should be large enough to avoid cutting the material of the energy absorbing bolt  140 . However, the radius of the edge  234  may be sized sufficiently small to penetrate by compression the first side  152  of the energy-absorbing bolt  140 . A bolt guide  190  may guide normal sliding of the energy absorbing bolt  140  when the actuator  180  moves the energy absorbing bolt  140  between the locked position and an unlocked position. The bolt guide  190  may include an edge  192 . The edge  192  may include a curved radius similar to the edge  234  of the cavity  226  of the bolt receiver  220 . The edges  192  and  234  may together bite into the energy absorbing bolt  140  and thereby resist the opening of the door  200  under the intrusion load L. 
     The energy absorbing bolt  140  may further include high friction as an additional energy absorbing means to resist the opening of the door  200  under the intrusion load L. The high friction may generally operate between the jamb  310  of the door frame  300  and an end  202  of the door  200  adjacent the deformable bolt and actuator assembly  110 . In certain embodiments, the intrusion load L may be sufficient to bind-up the door  200 , the energy absorbing bolt  140 , and the jamb  310  of the door frame  300  and may thereby cause the door  200  to stick with the energy absorbing bolt  140  jammed between the door  200  and the door frame  300 . 
     Turning now to  FIGS. 13 and 14 , another energy absorbing lock system  200 , according to the principals of the present disclosure, is illustrated. The energy absorbing lock system  200  may include some or all of the features of the energy absorbing lock system  100 . The energy absorbing lock system  200  further includes a deformation guiding portion  230 ′ at or adjacent an edge  192 ′ of a bolt guide  190 ′. The deformation guiding portion  230 ′ operates in much the same manner as the deformation guiding portion  230 , described above. However, the deformation guiding portion  230 ′ is a part of the bolt guide  190 ′. The deformation guiding portion  230 ′ may be used in conjunction with the deformation guiding portion  230 . By combining two deformation guiding portions  230 ,  230 ′, additional energy may be absorbed by the energy absorbing bolt  140 . As depicted, the deformation guiding portion  230 ′ resides on the door  200  and the deformation guiding portion  230  resides on the door frame  300 . 
     As depicted, the energy absorbing bolt  140  is made of material that may be extruded along the bolt axis A (see  FIG. 6 ). For example, the hardened steel and/or spring steel spine  160  (i.e., the spring spine) includes an extruded shape along the bolt axis A. In other embodiments, the material of the energy absorbing bolt  140  may be extruded in other directions and/or varying directions. For example, the energy absorbing bolt  140  may include a coil spring (e.g., a steel coil spring) that may follow a helical path. The coil spring may include a net shape of the energy absorbing bolt  140  and/or the coil spring may include a coating covering the coil spring. The coil spring may be embedded in other energy absorbing material or other material of the energy absorbing bolt  140 . In other embodiments, a non-coil spring of the energy absorbing bolt  140  may also include a net shape of the energy absorbing bolt  140  (e.g., a pair of leaf springs) and/or the non-coil spring may include a coating of the energy absorbing bolt  140  covering the non-coil spring. The non-coil spring may be embedded in other energy absorbing material or other material of the energy absorbing bolt  140 . 
     The energy absorbing bolt  140  may further include the following materials, either alone or in combination with other material or materials. 
     Viton Extreme from DuPont 
     Tetrafluoroethylene Propylene, FEPM 
     Silicone Rubber, VMQ/PVMQ 
     Polyurethane Elastomer, AU or EU 
     Polysulphide Rubber, TR 
     Perfluoroelastomer, FFKM—known as the DuPont product Kalrez 
     Hydrogenated Nitrile Rubber, HNBR 
     Nitrile Butadiene Rubber, NBR 
     Fluorosilicone, FVMQ 
     Fluorelastomere, FKM/FPM, also known as Viton Elastomer by DuPont 
     Ethylene Propylene Copolymer EPM or EPDM 
     Epichlorhydrin (CO) 
     Chlorosulphonated Polyethylene (CSM) 
     Chloronated Polyethylene (CPE) 
     Ethylene Acrylic, AEM 
     Alkyl Acrylic copolymer, ACM 
     Polychloroprene, CR 
     Chlorobutyl Rubber (CIIR) 
     Isobutylene-isopropene copolymere (IIR) 
     Polybutadiene (BR) 
     Stryrene Butadiene (SBR) 
     Synthetic cis-polyisoprene (IR) 
     Natural Cis-Polyisoprene (NR) 
     This application is being filed concurrently with a U.S. non-provisional patent application known by Ser. No. 14/211,738 and entitled ENERGY ABSORBING LATCH SYSTEMS AND METHODS which is incorporated herein by reference in its entirety. The subject matter of the ENERGY ABSORBING LATCH SYSTEMS AND METHODS and the subject matter of the present patent application may be used on the same door  200  and/or door frame  300 . 
     Various modifications and alterations of this disclosure will become apparent to those skilled in the art without departing from the scope and spirit of this disclosure, and it should be understood that the scope of this disclosure is not to be unduly limited to the illustrative embodiments set forth herein.

Summary:
A door lock secures a door when closed within a doorframe. The lock includes a bolt guide, a bolt, a bolt actuator, and a bolt receiver. The bolt includes a first portion that is adjacent to a proximal end and a second portion that is adjacent a distal end of the bolt. The actuator moves the bolt along the bolt guide between a locked position and an unlocked position. The second portion extends beyond the guide when in the locked position and is received by the receiver. The bolt deforms within the receiver and thereby predominantly absorbs energy from an intrusion load. A maximum deformation of the bolt prior to failure of the lock from the intrusion load is at least 4%, 25%, or 120% of a thickness of the bolt. A maximum deformation of the bolt prior to failure of the lock may be at least 40%, 55%, or 72% of a maximum overall deflection of the lock. The receiver may include a deformation guide that guides deformation of the bolt.