Objects such as personal property are often secured by placing the objects in an enclosed space and by locking doors into the space, such that ingress into the space is limited. In many cases, a lock is embedded in the door that has a movable bolt. In a locked position the bolt protrudes from the door into an opening in a wall to impede the door from opening. In an unlocked position the bolt is retracted into the door such that the door can be opened. Typically, the bolt is moved between the locked and unlocked positions by turning a key. The key is unique to the lock such that having the key is a prerequisite to accessing the space, although most keys can be easily duplicated.
Securing the space with a lock embedded in the door may be undesirable in cases in which possession of the spaces frequently changes. For example, self-storage or mini-storage facilities provide storage spaces that can be temporarily rented. Typically, a storage space has a latch on an exterior face of the door, and the current renter secures the space by attaching his own lock to the latch. Because each new renter supplies his own lock, the renter can secure the space without changing the lock embedded in the door or taking a chance that the prior possessor duplicated the key. However, because the lock is exposed on the exterior of the door, unauthorized entry to the space can be gained by severing the lock, such as by cutting the lock with a bolt cutter. For this reason, shrouded locks are often used on storage spaces because cutting a shrouded lock with a bolt cutter is very difficult. However, unauthorized entry to the space can still be gained by cutting the latch to separate the fully secured lock from the latch without cutting the lock or opening it with a key. In other words, the tamper resistant characteristics of the shrouded lock are insufficient to secure the space in cases in which the latch is also exposed and can be breached. From the above, it is apparent that a need exists in the industry for a solution to these deficiencies.
In one embodiment, a locking assembly includes a latch having a bolt that is movable between an unlocked and a locked position, and a plurality of locking members configured to be locked together to secure the bolt in the locked position. Each locking member may have an aperture that is closed on an edge by a connecting portion of the locking member. The locking assembly may also include at least two locks, each lock having a shackle and an opening. The shackle may be movable between an unlocked position in which the connecting portions of the locking members can be placed into the opening, and a locked position in which the shackle extends through the apertures to lock the locking members together. The locking assembly may also include a latch shield having an occluding member positioned in the openings of the locks along with the connecting portions of the locking members, and a plurality of blocking members positioned outward of the locks. The blocking members may be configured such that the blocking members cannot pass through the openings, such that the occluding member occludes the locking members to prevent cutting the locking members and the blocking members limit movement of the occluding member to prevent removing the occluding member without unlocking the locks.
A latch shield includes an occluding member having a length configured to at least span a distance between two locks and a cross-section configured to substantially fill an opening in each of the locks when positioned in the openings along with locking members of a latch such that the locking members are occluded by the occluding member. A plurality of blocking members may be coupled to the occluding member, the blocking members being configured to be positioned outward of the locks when the occluding member is positioned in the openings of the locks. The blocking members may be shaped to restrict movement of the occluding member such that the occluding member cannot be removed from the openings when the locks are locked.
Other systems, devices, methods, features, and advantages of the disclosed locking assembly will be apparent or will become apparent to one with skill in the art upon examination of the following figures and detailed description. All such additional systems, devices, methods, features, and advantages are intended to be included within the description and are intended to be protected by the accompanying claims.
The present disclosure may be better understood with reference to the following figures. Matching reference numerals designate corresponding parts throughout the figures, and components in the figures are not necessarily to scale.
The stationary locking-member 24 is stationary with respect to the base 22, while the movable locking member 26 is movable with respect to the base between a locked and an unlocked position. The bolt 30 is coupled to the movable locking-member 26, such that movement of the movable locking member along the slit 28 causes concomitant movement of the bolt. When the movable locking member 26 is in the unlocked position, the bolt 30 is retracted into the latch 20. When the movable locking member 26 is in the locked position, the bolt 30 is fully extended from the latch 20. In
The latch 20 includes apertures 32 configured to receive a shackle 46 of the lock 40, the apertures being formed through the locking members 24, 26. In the illustrated embodiment, the apertures 32 are arranged on the latch 20 to form two separate sets, and therefore the latch 20 can be used with at most two locks 40. In other embodiments, greater or fewer sets of apertures 32 may be provided on the locking members 24, 26, such that more or fewer locks 40 may be used. Each aperture 32 is adjacent a relatively narrow connecting portion 34 of the locking member 24, 26, the connecting portion closing the aperture along an exterior edge 36 of the locking member. In
The locking assembly 10 also includes one or more locks 40. Any type and any number of locks 40 may be used, depending on the embodiment. For example, the lock 40 may be a padlock such as a keyed lock or a combination lock. The lock 40 may be a shrouded padlock having a body that is shaped to define a relatively small opening for receiving the objects to be clasped together, such as the disc or biscuit locks of the illustrated embodiments, although other configurations are possible. Because such locks 40 are known, a thorough discussion is omitted here. Briefly, however, the lock 40 includes a body 42 configured to house elements of the lock, an opening 44 formed in the body for receiving the objects to be locked together, and a shackle 46 that is movable between an unlocked and a locked position. In the unlocked position, the shackle 46 is retracted into the body 42 such that the objects can be placed into the opening 44. In the locked position, the shackle 46 bridges the opening 44 from one side of the body 42 to the other, such that the objects are secured together within the opening. To move the shackle 46 between the locked and unlocked positions, a key (not shown) is inserted into a keyhole 48 and is turned, although in other embodiments the lock 40 may be locked and unlocked in other manners.
As mentioned, the illustrated lock 40 is a “shrouded” padlock due to the shape of the opening 44 formed in the body 42. Specifically, the opening 44 is configured such that a relatively smaller portion of the shackle 46 is exposed than with a traditional padlock. In such cases, it may be relatively difficult to remove the lock 40 by cutting through the shackle 46. The difficulty associated with cutting the shackle 46 may be further increased by using a lock 40 having a shackle made from a material such as hardened metal.
In the illustrated embodiment, the body 42 of the lock 40 is a substantially circular metal casing having a diameter of about 2¾ inches. The shackle 46 is a curved cylindrical rod formed from hardened metal having a diameter of about ⅜ inches. The opening 44 formed in the body 42 is substantially semi-circular, having a diameter of about ⅞ inches. For example, the lock 40 may be #40 padlock manufactured by the Master Lock Company of Milwaukee, Wis. In other embodiments, the lock 40 may have other shapes, dimensions, or may be made from other materials, because as mentioned above, any lock can be used in the locking assembly 10.
With reference back to
In the illustrated embodiment the latch shield 60 is a substantially U-shaped bar 70. The U-shaped bar 70 may be a single bar that is bent at both ends. The U-shaped bar 70 has a central occluding portion 72 that forms the occluding member 62, two outward blocking portions 74 that form the blocking members 64, and two connecting curves 76 that connect the outward blocking portions to the central occluding portion.
The central occluding portion 72 is a substantially straight length of tubular bar. The blocking portions 74 are also substantially straight lengths of tubular bar that are substantially perpendicular to the central occluding portion 72. Each of the connecting curves 76 has a radius of curvature such that the connecting curve extends between a connected end of one of the blocking portions 74 and an end of the central occluding portion 72.
The U-shaped bar 70 is formed from a material that is relatively difficult and time consuming to destruct. For example, the U-shaped bar 70 may be formed from a material that cannot be cut with bolt cutters. In at least some embodiments, the U- shaped bar 70 is formed from a hardened metal such as steel, although other materials could be used.
In some embodiments, the U-shaped bar 70 may be a single piece formed by a process such as extrusion. For example, the U-shaped bar 70 may be an extruded tube of hardened metal that is subsequently bent at both ends to form the connecting curves 76 and the two outward blocking portions 74. In such cases, the U-shaped bar 70 may have a cross-section 66 that is substantially uniform. The cross-section 66 may be circular, or the cross-section may have any other shape.
In some embodiments, the U-shaped bar 70 is sized and shaped for use with a latch 20 in which the distance between the apertures 32 on the locking members 24, 26 is about 1.5 to 2 inches, such as the latch shown in the illustrated embodiment. In such an embodiment, the length 68 of the central occluding portion 72 is at least about 3inches and may be about 4 to 5 inches. In some embodiments, the U-shaped bar 70 is configured for use with a lock 40 having an opening 44 that is substantially semi-circular and has a diameter of about ⅞ inch, such as the locks shown in the illustrated embodiment. In such an embodiment, the U-shaped bar 70 may have a circular cross-section 66 having a diameter of about 0.5 inches, and a radius of curvature of the connecting curves 76 may be between about 0.5 inches to about 2 inches.
The latch shield 60 is illustrated as a U-shaped bar 70, having a circular cross-section 66, because such a bar is relatively easy and inexpensive to produce using an extrusion process, and because such a shape facilitates inserting the latch shield through the lock 40, as further described below. However, in other embodiments, the latch shield 60 may have other shapes, sizes, and configurations. For example, the latch shield 60 need not be a U-shaped bar 70. In some embodiments, the connecting curves 76 are omitted completely, and the blocking members 64 are configured other than as shown in the illustrated embodiment. For example, the blocking members 64 may be masses that are relatively larger than the openings 44 formed in the locks 40, such that the blocking members cannot be passed through the openings. In such case, the blocking members 64 could be spheres, blocks, star-shape, or any other shape configured to block the removal of the occluding member 62. Additionally, the latch shield 60 need not have the circular cross-section 66. For example, the occluding member 62 may have a hollow configured to mate with the connecting portions 34 of the locking members 24, 26, such that the latch shield 60 specifically fits over the connecting portions to further occlude them. The occluding member 62 may also be shaped to fit over the shackle 46 of the lock 40 such that the shackle is occluded from tampering.
The operation of the latch shield 60 will now be described with reference to
In other embodiments, the illustrated embodiment of the latch shield 60 may be coupled to the latch 20 and locks 40 in other manners. For example, the latch shield 60 may be held adjacent the latch 20, and the first and second locks 40A, 40B may be placed over the latch shield and locked into place. [However, attaching the latch shield 60 as described above, by locking the first lock 40A into place and passing the latch shield 60 through the first lock 40A, may be less cumbersome for the user.]
Referring now more specifically to
As noted hereinabove, the shape and size of the latch shield may vary greatly depending on the shape and size of the latch 20 and the shape, size, and number of locks. For example, in
This configuration provides several advantages. The landlord or the tenant can secure the latch using only a single lock as opposed to multiple locks. The latch shield is designed such that the occluding member has a certain circumference. The blocking members are designed with a circumference greater than the occluding member such that the latch shield cannot be removed without first removing the lock. The occluding member, as discussed earlier, is of a sufficient size to fill the area defined by the openings 44 of the lock, such that the connecting portion 34 cannot be cut and compromise the security of the door.
Another advantage of the latch shield shown in
In the alternate embodiment shown in
As discussed hereinabove, all of the latch shields shown in
While particular embodiments of a locking assembly have been disclosed in detail in the foregoing description and figures for purposes of example, those skilled in the art will understand that variations and modifications may be made without departing from the scope of the disclosure. All such variations and modifications are intended to be included within the scope of the present disclosure, as protected by the following claims.
This application is a continuation in part of copending U.S. utility application entitled, “LOCKING ASSEMBLY,” having Ser. No. 11/633,230, filed Dec. 4, 2006, which is entirely incorporated herein by reference.
Number | Date | Country | |
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Parent | 11633230 | Dec 2006 | US |
Child | 12490945 | US |