Abstract:
A lock system has an elongate channel, a drive bar disposed within the housing, a locking element adapted to be actuated by the drive bar from a retracted position to an extended position; and a linkage connected to the drive bar. The linkage is adapted to be actuated from a first position to a second position by selective contact with a deadbolt disposed external to the elongate channel. Moving the linkage from the first position to the second position actuates the locking element from the retracted position to the extended position.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims priority to and the benefit of U.S. Provisional Patent Application Ser. No. 61/947,602, filed Mar. 4, 2014, entitled, “Deadbolt-activated Supplemental Lock,” the disclosure of which is hereby incorporated by reference herein in its entirety. 
     
    
     INTRODUCTION 
       [0002]    Locks are installed on hinged and sliding doors to lock the door within the frame for security purposes. Hinged doors, for example, typically include a locking latch. The latch holds the door closed but does not necessarily lock the door. The latch may be actuated by turning an associated door knob or by pressing a thumb actuator to release the latch. In certain doors, the latch may be locked to provide a degree of security. Doors (such as exterior doors) that include latches often include a deadbolt to provide enhanced security. The deadbolt extends into the door frame to hold the door in place. The deadbolt is actuated by a thumb turn on the interior of the door or by a lock cylinder on the exterior of the door. When the deadbolt is extended into the frame, a robust locking result is achieved. Doors that utilize deadbolts may still be defeated, however, since it is generally well known by an intruder that the deadbolt is disposed proximate the center of the door, near the lock cylinder. Thus, intruders often concentrate their breaching efforts against the center of the door to defeat the lock. 
       SUMMARY 
       [0003]    The locking systems disclosed herein fit in a hinged or sliding door frame, where the door utilizes an off-the-shelf latch and a deadbolt at a standard or other bore spacing. When the door is closed and the deadbolt is thrown, the end of the deadbolt extends into a lock housing disposed on the door frame. Within the housing are one or two linkages that, when actuated by the deadbolt, extend one or more locking elements from the lock housing. These locking elements may be disposed above and/or below the deadbolt. The end of the deadbolt pushes on an element in the locking system linkages that operate drive bars that extend locking elements. The deadbolt is still functional. Thus, depending on the number of locking elements used, multiple lock points between the frame and door panel result. The linkage operates the locking elements. In certain embodiments, locking elements may be located both above and below the deadbolt. The bolt housings and linkages may be extended to put the bolts higher and lower on the door if desired. 
         [0004]    In one aspect, the technology relates to a lock system having: an elongate channel; a drive bar disposed within the housing; a locking element adapted to be actuated by the drive bar from a retracted position to an extended position; and a linkage connected to the drive bar, wherein the linkage is adapted to be actuated from a first position to a second position by selective contact with a deadbolt disposed external to the elongate channel, and wherein moving the linkage from the first position to the second position actuates the locking element from the retracted position to the extended position. In an embodiment, a housing defines an opening aligned with the linkage, wherein the opening is adapted to receive the deadbolt. In another embodiment, the linkage includes a pivotable actuator. In yet another embodiment, the pivotable actuator is pivotably connected to the housing at a pivot point, and wherein the pivotable actuator includes: a contact leg, wherein the contact leg is adapted to contact the deadbolt; and a link leg, wherein the link leg is connected to the drive bar, wherein the contact leg and link leg are connected to each other proximate the pivot point. In still another embodiment, the locking element is pivotably connected to the drive bar. 
         [0005]    In another embodiment of the above aspect, the drive bar is adapted for a vertical movement within the elongate channel between a first vertical position and a second vertical position. In an embodiment, the linkage and the drive bar translate horizontal movement of the deadbolt into rotational movement of the locking element. In another embodiment, the drive bar includes a first drive bar and a second drive bar; wherein the locking element includes a first locking element actuated by the first drive bar and a second locking element actuated by the second drive bar; and wherein the linkage includes a first linkage connected to the first drive bar and a second linkage connected to the second drive bar. In yet another embodiment, the first locking element is disposed on a first side of the deadbolt and the second locking element is disposed on a second side of the deadbolt when the lock system is installed in a door frame. 
         [0006]    In another aspect, the technology relates to a lock system having: a housing configured to be installed in at least one of a door frame and a locking edge of a door, wherein the housing defines an opening for receiving a deadbolt extending from a door panel; a first pivotable actuator disposed proximate the opening, wherein the first pivotable actuator is configured to contact the deadbolt; a first linkage connected to the first pivotable actuator; a first drive bar connected to the first linkage; and a first pivotable locking element connected to the first drive bar, wherein a force applied by the deadbolt to the first pivotable actuator pivots the first pivotable actuator, wherein the pivoting of the first pivotable actuator moves substantially linearly and pivotably the first linkage, wherein the substantially linear and pivotal movement of the first linkage moves the first drive bar linearly, and wherein the linear movement of the first drive bar pivots the first pivotable locking element to an extended position. In an embodiment, a first U-shaped channel defines an opening, wherein the first drive bar and at least a portion of the first linkage are disposed in the first U-shaped channel, and wherein when the first pivotable locking element is in the extended position, the first pivotable locking element extends through the opening. In another embodiment, the first U-shaped channel is connected to the housing. In yet another embodiment, both of the first pivotable actuator and the first pivotable locking element pivot in a first direction upon application of the force from the deadbolt to the first pivotable actuator. In still another embodiment, the housing defines a longitudinal axis and wherein the first direction is about an axis substantially orthogonal to the longitudinal axis. 
         [0007]    In another embodiment of the above aspect, the lock system further includes a U-shaped channel, wherein the first pivotable locking element is pivotably connected to the U-shaped channel and wherein the first drive bar is slidably connected to the U-shaped channel. In an embodiment, the U-shaped channel is connected to the housing. In another embodiment, a second pivotable actuator disposed proximate the opening, wherein the second pivotable actuator is configured to contact the deadbolt; a second linkage connected to the second pivotable actuator; a second drive bar connected to the second linkage; and a second pivotable locking element connected to the second drive bar, wherein a force applied by the deadbolt to the second pivotable actuator pivots the second pivotable actuator, wherein the pivoting of the second pivotable actuator moves substantially linearly and pivotably the second linkage, wherein the substantially linear and pivotal movement of the second linkage moves the second drive bar linearly, and wherein the linear movement of the second drive bar pivots the second pivotable locking element to an extended position. In yet another embodiment, both of the second pivotable actuator and the second pivotable locking element pivot in a second direction upon application of the force from the deadbolt to the second pivotable actuator. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0008]    There are shown in the drawings, embodiments which are presently preferred, it being understood, however, that the technology is not limited to the precise arrangements and instrumentalities shown. 
           [0009]      FIG. 1  depicts a perspective view of a deadbolt-activated supplemental lock. 
           [0010]      FIGS. 2A and 2B  depict front and rear exploded perspective views, respectively, of the deadbolt-activated supplemental lock of  FIG. 1 . 
           [0011]      FIGS. 3A and 3B  depict side sectional views of a door frame and a deadbolt-activated supplemental lock, in unlocked and locked conditions, respectively. 
           [0012]      FIG. 4  is a schematic perspective view of a locking member. 
           [0013]      FIG. 5  is a partial side sectional view of a deadbolt-activated supplemental lock. 
       
    
    
     DETAILED DESCRIPTION 
       [0014]      FIG. 1  depicts a perspective view of a deadbolt-activated supplemental lock  100 . The multi-point lock  100  includes two spaced locking members  102 . A base  104  of an elongate U-shaped channel  106  (described in more detail below in  FIG. 2 ) is recessed into a door frame or a locking edge of an opposing door. For clarity, the lock  100  will be described as being installed in a door frame. A cover plate or face plate (not shown) may be secured to the base  104  through one or more screw holes  108  to cover the supplemental lock  100  for aesthetic purposes. The screw holes  108  can additionally be used with screws or other fasteners to secure the channel  106  to a door frame. The cover plate may also cover a centrally-disposed housing  110  that is connected to each of the two U-shaped channels  106 . In another embodiment, the housing  110  and the U-shaped channels  106  define a unitary part. The screw holes  108  can additionally be used with screws to secure the channels  106  and housing  110  to the door frame. The housing  110  may define a deadbolt opening  112  configured to receive a deadbolt that extends from a pivoting or sliding door disposed opposite the door frame, as well as a latch opening  114  configured to receive a latch similarly located. 
         [0015]    As described above, the supplemental lock  100  may include two locking members  102 , but in certain embodiments, as few as one or more than two locking members may be utilized. When in the retracted position, as depicted in  FIG. 1 , the locking members  102  are retracted within the U-shaped channel  106 . The base  104  of the channel  106  defines two apertures  116 , through which the locking members  102  extend when in the locked or extended position. Pivot pins  118  pivotally secure the locking members  102  to the sides  120  of the U-shaped channel  106 . 
         [0016]      FIGS. 2A and 2B  depict front and rear exploded perspective views, respectively, of the deadbolt-activated supplemental lock  100  of  FIG. 1 , and are described simultaneously. A number of components of the lock  100  are described above in  FIG. 1  and are therefore not necessarily described further. Additionally, certain components and structural relationships therebetween are depicted in  FIG. 1 , for clarity. The sides  120  of the U-shaped channels  106  each define an elongate void  122  therebetween. The lock system  100  has a substantially vertical axis A V , when installed vertically within a door frame. Disposed in each void  122  are the locking member  102  and a drive bar  124 . The drive bar  124  moves in a substantially vertical direction, linearly along axis A V  within the U-shaped channel  106  during use, as described in more detail below. The pivot pins  118  are inserted through openings  126  defined in one or both sides  120  of the U-shaped channel  106 . Elongate slots  126  in the drive bar  124  provide clearance for the pivot pins  118  during linear movement of the drive bar  124 . The drive bar  124  may define additional elongate slots  128  that provide clearance for stationary guide pins  130  that are secured to the U-shaped channel  106  so as to guide movement of the drive bar  124 . 
         [0017]    The drive bar  124  is connected to a linkage  132 . The linkage  132  includes link leg  134  that is, in turn, connected to a contact leg or pivoting actuator  136 . Each pivoting actuator  136  projects into the deadbolt opening  112  and is configured to contact a deadbolt extending from the associated door. Upon a contact force being applied by a deadbolt to the pivoting actuator  136 , the pivoting actuator  136  pivots. This pivoting movement causes a corresponding pivoting and linear movement of the link leg  134 , which in turn linearly moves the drive bar  124 . This linear movement of the drive bar  124  is translated into pivotal movement of the locking element  102 , as described in further detail below. In the depicted embodiment, various elements (e.g., pivoting actuator  136 , link leg  134 , drive bar  124 ) are connected with pivoting connection pins  138 . The pivoting actuators  136  are configured to pivot about pivot pins  140  secured to the housing  110 . 
         [0018]      FIGS. 3A and 3B  depict side sectional views of a door frame  200  and a deadbolt-activated supplemental lock  100 , in unlocked and locked conditions, respectively, and are described simultaneously. A number of components of the lock  100  are described above in  FIGS. 1 ,  2 A, and  2 B and are therefore not necessarily described further. Additionally, certain components and structural relationships therebetween are depicted in the previous figures, for clarity.  FIGS. 3A-3B  depict an edge view of the door frame  200 , depicting a deadbolt-activated supplemental lock system  100 . The lock system  100  is installed in a slot formed in the locking edge  202  of the door frame  200 , behind a strike plate or housing  110  that defines a latch opening  114  to receive the latch  204  from the associated latch mechanism in the door  206 . Additionally, the housing  110  defines a deadbolt opening  112  to receive the deadbolt  208  from the door  206 . The housing  110  may be connected to or discrete from one or more U-shaped channels  106 , only the base  104  of which are shown for clarity. In the depicted embodiment, the U-shaped channels  106  are depicted, one above and one below the housing  110 . Each U-shaped channel  106  defines an opening  116  through which a locking element  102  may extend when moved to a locked position (as depicted in  FIG. 3B ). 
         [0019]    In the unlocked condition of  FIG. 3A , each of the pivoting actuators  136  are disposed in a first position proximate the deadbolt opening  112 . The locking elements  102  are retracted within the U-shaped channel  106 . Each locking element  102  is connected to the drive bar  124  with a drive pin  142 . Each drive pin  142  engages a drive pin opening in the locking member  102 , as well as a drive pin recess in the drive bar  124 . Then the deadbolt  208  enters the deadbolt opening  112 , it contacts and pivots P the pivotable actuators  136  of the linkages  132 . This pivots P the pivotable actuators  136  to a second position which, in turn, pivots and moves linearly the link leg  134 . This moves the drive bar  124  vertically along axis A V  relative to the U-shaped channel  106 . This causes the locking members  102  to rotate R around pivot pins  118 . When the drive bar  124  is driven, the rotation R extends the locking members  102  from a first, retracted position (depicted in  FIG. 3A ) to a second, extended position (depicted in  FIG. 3B ). As can be seen, as one of the pivotable actuators  136  pivots P, the associated locking member  102  rotates in the same direction. These pivoting or rotational movements of the pivotable actuator  136  and the locking element  102  are about axes substantially orthogonal to the axis A V . In the retracted position, the locking members  102  are contained within the U-shaped channel  106  and the door can be opened and closed. In the extended position, the locking members  102  extend through the aperture  116  of the U-shaped channel  106 , engaging keepers  210  on a locking edge of the door, locking the door in a closed position. In the depicted embodiments, the locking members  102  are of a linear configuration, but hooked locking members may also be utilized. Such a configuration enables the lock system  110  to be utilized in applications such as sliding doors. 
         [0020]      FIG. 4  is a schematic perspective view of a locking member  300  for a deadbolt-activated supplemental lock. The locking member  300  includes a base section  302  and a bolt section  304 . The base section  302  defines a drive pin opening  306  for receipt of a drive pin, as described above, and a pivot pin opening  308  for receipt of a pivot pin. The bolt section  304  includes tapered surfaces  310  to improve performance of the lock, especially when the lock is installed so as to engage a warped panel door, or in a door frame that settles or shifts over time. The tapered leading surfaces  310   a  provide a lead-in to the strike located on the door. The tapered trailing surfaces  310   b  reduce potential surface contact between the bolt section  304  and the strike, this reducing operational forces on the supplemental lock. Substantially flat, parallel side surfaces  312  allow for secure contact between the bolt section  304  and the associated keeper. 
         [0021]      FIG. 5  is a partial side sectional view of a deadbolt-activated supplemental lock  100 . For example, an upper one of the locking members  102  is depicted. The locking member  102  defines a hollow central bore, into which a hardened steel or other metal pin  400  is inserted. During assembly of the lock  100  the hardened pin  400  is inserted via an access channel  402 , after which the locking member  102  is secured via a rivet  404  to a U-shaped channel. Both the hardened pin  400  and rivet  404  are a slight clearance fit within the locking member  102 . The clearance fit between the hardened pin  400  and the locking member  102  prevents the locking member  102  from being cut through in an effort to defeat the lock  100 . To the extent a person could access and begin to saw through the locking member  102 , the hardened pin  400  has sufficient clearance within the locking member  102  to rotate circumferentially when contacted by the saw blade, thus preventing cutting of the pin  400  and complete cutting through of the locking member  102 . 
         [0022]    In addition to the embodiments of the lock depicted herein, wherein a single locking element is disposed in each of the upper U-shaped channel and the lower U-shaped channel, other embodiments are contemplated. For example, a lock system may include a single U-shaped channel, either above or below the deadbolt opening. Greater than one locking element may be utilized for each U-shaped channel. For a particular multi-point lock, the locking member, drive bar, and drive pin may be configured to allow the locking members to rotate clockwise or counter-clockwise to reach an extended position. Additionally, the same multi-point lock may utilize locking members that rotate in opposite directions as they extend during use. The locking members may be a substantially uniform shape or any shape desired. It is contemplated that the various components and configurations depicted with regard to the multi-point locks disclosed herein, as well as modifications thereof envisioned by a person of ordinary skill in the art, are interchangeable. 
         [0023]    The various elements of the locks depicted herein may be manufactured of any materials typically used in door hardware/lock manufacture. Such materials include, but are not limited to, cast or machined steel, stainless steel, brass, titanium, etc. Material selection may be based, in part, on the environment in which the lock is expected to operate, material compatibility, manufacturing costs, product costs, etc. Additionally, some elements of the lock may be manufactured from high-impact strength plastics. Such materials may be acceptable for applications where robust security is less critical, or when a secondary, stronger material is utilized in conjunction with the plastic part (for example, a plastic locking member used in conjunction with a hardened pin manufactured of metal). 
         [0024]    While there have been described herein what are to be considered exemplary and preferred embodiments of the present technology, other modifications of the technology will become apparent to those skilled in the art from the teachings herein. The particular methods of manufacture and geometries disclosed herein are exemplary in nature and are not to be considered limiting. It is therefore desired to be secured in the appended claims all such modifications as fall within the spirit and scope of the technology. Accordingly, what is desired to be secured by Letters Patent is the technology as defined and differentiated in the following claims, and all equivalents.