ELECTRONIC LOCKBOX WITH EMBEDDED INSERT
20220284751 · 2022-09-08
Assignee
Inventors
- Scott R. Fisher (West Chester, OH, US)
- Matthew K. Caskey (Loveland, OH, US)
- Jeffrey W. STONE (Lebanon, OH, US)
Cpc classification
E05G1/005
FIXED CONSTRUCTIONS
E05B67/22
FIXED CONSTRUCTIONS
International classification
E05B67/22
FIXED CONSTRUCTIONS
Abstract
An electronic lockbox including a key bin having an embedded insert. The insert is embedded during a die cast process. The insert enhances the attack resistance of the lockbox from hammering, chiseling, and drilling attacks. The insert includes “3D features” that help with the casting process and attack resistance, including at least one through-hole, at least one slot, and at least one ridge. A housing portion is constructed over multiple drawing stages to increase its hardness and strength, thereby increasing resistance to prying attacks.
Claims
1. An electronic lockbox comprising: (a) a housing that covers an electronically-controlled lock; and (b) a closable secure container that includes a base portion; wherein: (i) said base portion including an embedded steel plate, said steel plate exhibiting a material thickness of at least 0.0762 cm (0.03 inches); and (ii) said secure container is lockable if inserted into said housing, and said secure container is at least partially removable if unlocked.
2. The lockbox of claim 1, wherein: (a) said steel plate is heat treated before being embedded; and (b) said steel plate is embedded during a die casting process that forms said secure container.
3. The lockbox of claim 1, wherein, said secure container comprises one of: an aluminum-based alloy, and a zinc-based alloy.
4. The lockbox of claim 1, wherein: (a) said housing comprises a steel alloy; and (b) said housing is constructed by a drawing process, using multiple drawing stages.
5. The lockbox of claim 1, wherein: (a) said steel plate is embedded during a die casting process that forms said secure container; and (b) said steel plate includes at least one opening proximal to a perimeter of the steel plate, such that molten metal alloy flows through said at least one opening during said die casting process.
6. The lockbox of claim 1, wherein: (a) said steel plate is embedded during a die casting process that forms said secure container; (b) said steel plate includes at least one inclined tab proximal to the perimeter of said steel plate, and said at least one inclined tab includes at least one opening; and (c) a material of said at least one inclined tab is partially annealed in only a localized manner during said die casting process.
7. The lockbox of claim 1, wherein: (a) said steel plate is embedded during a die casting process that forms said secure container; (b) said steel plate is substantially planar with a perimeter, said steel plate exhibiting at least one inclined tab proximal to said perimeter, said steel plate exhibiting a plurality of openings, said steel plate exhibiting at least one ridge or channel running along its surface; said steel plate exhibiting at least one slot proximal to said perimeter; and (c) said steel plate is embedded in a wall portion of said secure container during said die casting process.
8. An electronic lockbox comprising: (a) a housing that covers an electronically-controlled lock; and (b) a closable secure container including a base portion; wherein: (i) said base portion including an embedded steel plate, said steel plate being hardened by heat treatment, and exhibiting a material hardness of between 52 and 58 on the Rockwell “C” scale; and (ii) said secure container is lockable if inserted into said housing, and said secure container is at least partially removable if unlocked.
9. The lockbox of claim 8, wherein: (a) said housing comprising of low carbon nickel stainless steel; and (b) said housing exhibiting a material hardness between 38 and 42 on the Rockwell “C” scale.
10. The lockbox of claim 8, wherein, said secure container comprises one of: an aluminum-based alloy, and a zinc-based alloy.
11. The lockbox of claim 8, wherein: (a) said steel plate is embedded during a die casting process that forms said secure container; and (b) said steel plate includes at least one opening proximal to a perimeter of the steel plate, such that molten metal alloy flows through said at least one opening during said die casting process.
12. The lockbox of claim 8, wherein: (a) said steel plate is embedded during a die casting process that forms said secure container; (b) said steel plate includes at least one inclined tab proximal to the perimeter of said steel plate, and said at least one inclined tab includes at least one opening; and (c) a material of said at least one inclined tab is partially annealed in only a localized manner during said die casting process.
13. The lockbox of claim 8, wherein: (a) said steel plate is embedded during a die casting process that forms said secure container; (b) said steel plate is substantially planar with a perimeter, said steel plate exhibiting at least one inclined tab proximal to said perimeter, said steel plate exhibiting a plurality of openings, said steel plate exhibiting at least one ridge or channel running along its surface; said steel plate exhibiting at least one slot proximal to said perimeter; and (c) said steel plate is embedded in a wall portion of said secure container during said die casting process.
14. A housing for an electronic lockbox, said housing comprising: (a) an outer housing constructed of a solid material including an open bottom portion; (b) a releasable secure container, said secure container being lockable if positioned inside said housing, and being releasable when unlocked; and (c) said secure container exhibiting a base portion which includes an embedded insert.
15. The housing of claim 14, wherein: said outer housing is constructed of 304L stainless steel.
16. The housing of claim 14, wherein: said secure container is constructed of A360 aluminum alloy.
17. The housing of claim 14, wherein: said insert is constructed of SK5 steel, or an equivalent high carbon steel.
18. The housing of claim 14, wherein, to form said secure container: said insert is mounted in a mold cavity, then molten A360 aluminum is forced into the mold cavity and around said insert, thus embedding said insert in said base portion of the secure container.
19. The housing of claim 18, wherein, during the formation of said secure container: (a) a temperature of said molten A360 aluminum is in the range of 1100-1200 degrees Fahrenheit; and (b) a temperature of said mold cavity is around 650 degrees Fahrenheit.
20. The housing of claim 14, wherein: (a) said insert is embedded during a die casting process that forms said secure container; (b) said insert is substantially planar with a perimeter, said insert exhibiting at least one inclined tab proximal to said perimeter, said insert exhibiting a plurality of openings, said insert exhibiting at least one ridge or channel running along its surface; said insert exhibiting at least one slot proximal to said perimeter; and (c) said insert is embedded in a wall portion of said secure container during said die casting process.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0032] The accompanying drawings incorporated in and forming a part of the specification illustrate several aspects of the technology disclosed herein, and together with the description and claims serve to explain the principles of the technology. In the drawings:
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DETAILED DESCRIPTION
[0050] Reference will now be made in detail to the present preferred embodiment, an example of which is illustrated in the accompanying drawings, wherein like numerals indicate the same elements throughout the views.
[0051] It is to be understood that the technology disclosed herein is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the drawings. The technology disclosed herein is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of “including,” “comprising,” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless limited otherwise, the terms “connected,” “coupled,” or “mounted,” and variations thereof herein are used broadly and encompass direct and indirect connections, couplings, or mountings. In addition, the terms “connected” or “coupled” and variations thereof are not restricted to physical or mechanical connections or couplings.
[0052] The terms “first” or “second” preceding an element name, e.g., first inlet, second inlet, etc., are used for identification purposes to distinguish between similar or related elements, results or concepts, and are not intended to necessarily imply order, nor are the terms “first” or “second” intended to preclude the inclusion of additional similar or related elements, results or concepts, unless otherwise indicated.
[0053] In addition, it should be understood that embodiments disclosed herein include both hardware and electronic components or modules that, for purposes of discussion, may be illustrated and described as if the majority of the components were implemented solely in hardware.
[0054] However, one of ordinary skill in the art, and based on a reading of this detailed description, would recognize that, in at least one embodiment, the electronic based aspects of the technology disclosed herein may be implemented in software. As such, it should be noted that a plurality of hardware and software-based devices, as well as a plurality of different structural components may be utilized to implement the technology disclosed herein. Furthermore, if software is utilized, then the processing circuit that executes such software can be of a general purpose computer, while fulfilling all the functions that otherwise might be executed by a special purpose computer that could be designed for specifically implementing this technology.
[0055] Referring now to
[0056] The upper housing of lockbox 10 includes two receptacles (openings) that receive a shackle 50. The shackle 50 has an upper portion and two shackle extensions 66, 68 (see
[0057] Behind the keypad 58, and internal to the housing 52, is a “locking mechanism” (or electronically-controlled “lock”) 20. The lock 20 secures both the shackle extension 66 and a secure container 40 (see
[0058] The keypad 58 may also be referred to as a “data input circuit,” in which a human user may press one or more of the keys to enter data, such as numeric information. It will be understood that future versions of electronic lockboxes may someday include a touchscreen display, and in such a design, the keypad will be incorporated directly into that display, and thus the touchscreen display itself would become the data input circuit.
[0059] As noted above, electronic lockbox 10 includes a shackle 50 that is typically used to attach the lockbox 10 to a door handle or other fixed object. Electronic lockbox 10 also includes a secure key compartment 64 which typically holds a building key (not shown), and which can be accessed via the releasable key bin (or “secure container”) 40 (which also can be referred to as a “movable portion” of the electronic lockbox). The electronic lockbox 10 has a front housing portion 42 and a rear housing portion 44.
[0060] Referring now to
[0061] Referring now to
[0062] Proximal to the inclined tab 95 is an opening or gap 94 along the longitudinal edge, and a through-hole 99. The insert 80 exhibits a plurality of through-holes 99, and their functionality will be described in further detail below. Proximal to the inclined tabs 96 are a plurality of small slots along the longitudinal edge 84. These small slots 84 are located along both sides of the inclined tabs 95, 96 along the bottom longitudinal edge (in this view), and the opening 94 acts as a large slot or gap where it meets the inclined tab 95. The inclined tabs 95, 96 exhibit a small through-hole 82 in each inclined tab.
[0063] The inclined tabs 88, 89 exhibit a plurality of large slots 92 along the transverse edges, and these large slots 92 are located along both sides of the inclined tabs 88, 89. Proximal to the inclined tabs 88, 89 are a plurality of through-holes 85 on the planar portion 81 of the insert 80. These through-holes 85 will be discussed in further detail below.
[0064] The single large inclined tab 98 exhibits a plurality of small through-holes 82, and on each side of the inclined tab 98 are large slots 90 along the upper longitudinal edge (in this view). The planar portion 81 exhibits two through-holes 99 near the outermost longitudinal edge proximal to each large slot 90. The planar portion 81 also exhibits a single large through-hole 83 near the left transverse edge (in this view).
[0065] Referring now to
[0066] The inclined tabs 88, 89, 95, 96, 98 are one “3D feature” used here to better secure the insert 80 to the key bin floor 56 during the die casting process, thereby improving the attack resistance by making it more difficult to break through or around the insert. The inclined tabs 88, 89, 95, 96, 98 tend to prevent complete annealing of the insert 80 during the die casting process. Another “3D feature,” the small holes 82, through-holes 85, and large through-hole 83, allow the molten alloy material to flow through and around the insert during the die cast process. A third “3D feature,” the small slots 84, large slots 90, and large slots 92, also allow the molten alloy material to flow through and around the insert during the die cast process, similar to the plurality of through-holes.
[0067] Referring now to
[0068] Referring now to
[0069] Referring now to
[0070] The insert 80 is preferably constructed from SK5 steel or an equivalent high carbon steel, for example. Steel is strong enough to increase the resistance to hammering, chiseling, and drilling attacks on the base 56 of the lockbox 10. The bottom half of the key bin 41 is preferably constructed from A360 aluminum, for example, although there are many variants of die casting alloys that can also be used.
[0071] The casing 52 is preferably constructed of 304L stainless steel, for example.
[0072] The casing 52 is formed through a drawing process utilizing multiple draws. Not only does this process provide a single-piece durable housing, but can also provide a variety of casing shapes. Due to this drawing process, the casing 52 exhibits increased resistance to prying attacks. The casing 52 preferably has a hardness of Rockwell “C” between 38-42, for example.
[0073] Referring now to
[0074] Referring now to
[0075] Referring now to
[0076] Referring now to
[0077] Referring now to
[0078] To cast the key bin, the casting block 100, having secured the insert 80 inside with the plurality of locating pins 106, is temporarily mated to the cavity block 102. A molten die casting material (comprising A360 aluminum, for example) is then poured into the casting block 100 and the cavity block 102. The molten material surrounds and engulfs the insert 80, by passing through the small holes 82, the individual hole 83, and the through-holes 85, and also through the small slots 84, large slots 90, and large slots 92. These particular “3D features” in the insert 80 provide structural integrity for the final product during this casting process. The other “3D feature,” the inclined tabs 88, 89, 95, 96, 98, help securely embed the insert 80 into the base 56 as the die cast material begins to cool, and those tabs also provide further structural integrity.
[0079] If aluminum alloy is used, its casting temperature is around 1100-1200 degrees Fahrenheit, for example, with a die temperature around 650 degrees Fahrenheit, for example. The specific heat of SK5 steel, if chosen as the material for the insert 80, is sufficient that the heat transfer from the casting material does not reach the ‘complete’ annealing temperature, because it does not “sit” there long enough (i.e., the “3D features” help the material flow during casting) for the grain structure of the steel to significantly change.
[0080] Referring now to
[0081] Referring now to
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[0083] Referring now to
[0084] It will be understood that the “main” lockbox housing 52 is designed to exhibit a sufficient hardness and structural strength so as to comprise a major “intruder-defeating” element for the overall lockbox 10. Part of this strength and hardness is due to the metal material that is used to create the housing 52. Moreover, additional strength and hardness is provided by the staged drawing process that “stretches” the housing during its manufacture, as described above. The reality of manufacturing costs does not permit this important structural element to literally be invulnerable, and instead, it is designed to be sufficiently difficult to break or cut open that a potential thief will be significantly slowed down in the attempt to drill or cut into the overall lockbox. The bottom wall (or floor) portion 56 of the key bin 40 is similarly designed to meet those criminal-defeating objectives.
[0085] It will also be understood that the location, shape, and number of slots and openings of the metal insert 80 can be varied without departing from the principles of technology disclosed herein. For example, the insert could be of a symmetrical design. As another example, the through-holes 82, 83, 85 are used to allow the molten metal to flow during the casting process; however, for a different shaped insert the through-holes may need to be moved, resized, or have more or fewer through-holes. Furthermore, the sizes and shapes of the inclined tabs certainly could be somewhat altered, as well as the rather elongated ridges 86; some or all of those tabs and ridges could perhaps be eliminated, although the overall utility of the embedded insert 80 might be comprised to some extent.
[0086] Some additional information about “basic” lockbox embodiments, including advanced features, are more fully described in earlier patent documents by some of the same inventors, and assigned to SentriLock, Inc. or SentriLock LLC, including: U.S. Pat. No. 7,009,489, issued Mar. 7, 2006, for ELECTRONIC LOCK SYSTEM AND METHOD FOR ITS USE; U.S. Pat. No. 6,989,732, issued Jan. 24, 2006, for ELECTRONIC LOCK SYSTEM AND METHOD FOR ITS USE WITH CARD ONLY MODE; U.S. Pat. No. 7,086,258, issued Aug. 8, 2006, for ELECTRONIC LOCK BOX WITH SINGLE LINEAR
[0087] ACTUATOR OPERATING TWO DIFFERENT LATCHING MECHANISMS; U.S. Pat. No. 7,420,456, issued Sep. 2, 2008, for ELECTRONIC LOCK BOX WITH MULTIPLE MODES AND SECURITY STATES; U.S. Pat. No. 7,193,503, issued Mar. 20, 2007, for ELECTRONIC LOCK SYSTEM AND METHOD FOR ITS USE WITH A SECURE MEMORY CARD; U.S. Pat. No. 7,999,656, issued Aug. 16, 2011, for ELECTRONIC LOCK BOX WITH KEY PRESENCE SENSING; U.S. Patent No. 7,734,068, issued Jun. 8, 2010, for ELECTRONIC LOCK BOX USING A BIOMETRIC IDENTIFICATION DEVICE; U.S. Pat. No. 8,451,088, issued May 28, 2013, for ELECTRONIC LOCK BOX WITH TRANSPONDER BASED COMMUNICATIONS; U.S. Pat. No. 8,164,419, issued Apr. 24, 2012, for ELECTRONIC LOCK BOX WITH TIME-RELATED DATA ENCRYPTION BASED ON USER-SELECTED PIN; U.S. Pat. No. 8,151,608, issued Apr. 10, 2012, for ELECTRONIC LOCK BOX WITH MECHANISM IMMOBILIZER FEATURES; U.S. Pat. No. 9,208,466, issued on Nov. 18, 2015, for ELECTRONIC LOCK BOX SYSTEM WITH INCENTIVIZED FEEDBACK; U.S. Pat. No. 8,593,252, issued Nov. 26, 2013, for ELECTRONIC LOCK BOX PROXIMITY ACCESS CONTROL; U.S. Pat. No. 8,912,884, issued Dec. 16, 2014, for ELECTRONIC KEY LOCKOUT CONTROL IN LOCKBOX SYSTEM; U.S. Pat. No. 9,053,629, issued on May 20, 2015, for CONTEXTUAL DATA DELIVERY TO MOBILE USERS RESPONSIVE TO ACCESS OF AN ELECTRONIC LOCKBOX; U.S. Pat. No. 9,478,083, issued on Oct. 5, 2016, for ELECTRONIC KEY LOCKOUT CONTROL IN LOCKBOX SYSTEM; U.S. Pat. No. 9,704,315, issued on Jun. 21, 2017, for CONTEXTUAL DATA DELIVERY TO OTHER USERS AT AN ELECTRONIC LOCKBOX; U.S. Pat. No. 10,068,399, issued on Aug. 21, 2018, for CONTEXTUAL DATA DELIVERY TO OTHER USERS AT AN ELECTRONIC LOCKBOX; U.S. Pat. No. 10,026,250, issued on Jun. 27, 2018, for CONTEXTUAL DATA DELIVERY TO USERS AT A LOCKED PROPERTY; and U.S. Patent Application No. 2020-0308870 A1, published on Oct. 1, 2020, for ELECTRONIC LOCKBOX. These patent documents are incorporated by reference herein, in their entirety.
[0088] All documents cited in the Background and in the Detailed Description are, in relevant part, incorporated herein by reference; the citation of any document is not to be construed as an admission that it is prior art with respect to the technology disclosed herein.
[0089] As used herein, the term “proximal” can have a meaning of closely positioning one physical object with a second physical object, such that the two objects are perhaps adjacent to one another, although it is not necessarily required that there be no third object positioned therebetween. In the technology disclosed herein, there may be instances in which a “male locating structure” is to be positioned “proximal” to a “female locating structure.” In general, this could mean that the two male and female structures are to be physically abutting one another, or this could mean that they are “mated” to one another by way of a particular size and shape that essentially keeps one structure oriented in a predetermined direction and at an X-Y (e.g., horizontal and vertical) position with respect to one another, regardless as to whether the two male and female structures actually touch one another along a continuous surface. Or, two structures of any size and shape (whether male, female, or otherwise in shape) may be located somewhat near one another, regardless if they physically abut one another or not; such a relationship could still be termed “proximal ” Or, two or more possible locations for a particular point can be specified in relation to a precise attribute of a physical object, such as being “near” or “at” the end of a stick; all of those possible near/at locations could be deemed “proximal” to the end of that stick. Moreover, the term “proximal” can also have a meaning that relates strictly to a single object, in which the single object may have two ends, and the “distal end” is the end that is positioned somewhat farther away from a subject point (or area) of reference, and the “proximal end” is the other end, which would be positioned somewhat closer to that same subject point (or area) of reference.
[0090] It will be understood that the various components that are described and/or illustrated herein can be fabricated in various ways, including in multiple parts or as a unitary part for each of these components, without departing from the principles of the technology disclosed herein. For example, a component that is included as a recited element of a claim hereinbelow may be fabricated as a unitary part; or that component may be fabricated as a combined structure of several individual parts that are assembled together. But that “multi-part component” will still fall within the scope of the claimed, recited element for infringement purposes of claim interpretation, even if it appears that the claimed, recited element is described and illustrated herein only as a unitary structure.
[0091] All documents cited in the Background and in the Detailed Description are, in relevant part, incorporated herein by reference; the citation of any document is not to be construed as an admission that it is prior art with respect to the technology disclosed herein.
[0092] The foregoing description of a preferred embodiment has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the technology disclosed herein to the precise form disclosed, and the technology disclosed herein may be further modified within the spirit and scope of this disclosure. Any examples described or illustrated herein are intended as non-limiting examples, and many modifications or variations of the examples, or of the preferred embodiment(s), are possible in light of the above teachings, without departing from the spirit and scope of the technology disclosed herein. The embodiment(s) was chosen and described in order to illustrate the principles of the technology disclosed herein and its practical application to thereby enable one of ordinary skill in the art to utilize the technology disclosed herein in various embodiments and with various modifications as are suited to particular uses contemplated. This application is therefore intended to cover any variations, uses, or adaptations of the technology disclosed herein using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this technology disclosed herein pertains and which fall within the limits of the appended claims.