Deck pedestal
09752331 ยท 2017-09-05
Assignee
Inventors
Cpc classification
E04F15/02464
FIXED CONSTRUCTIONS
E04F2015/02127
FIXED CONSTRUCTIONS
E04F15/02476
FIXED CONSTRUCTIONS
International classification
Abstract
A support pedestal for adjustably supporting a building surface component above a fixed surface and including a base member having a base plate that is configured to be placed upon a surface, a support member having a support plate that is configured to support at least one building surface component, and an adjustment apparatus interconnecting the base member and the support member that facilitates adjustment of each of the base member and support member relative to the other of the base member and the support member in numerous manners. The adjustment apparatus includes a first connector receivable in a first receiver attached to and extending away from one of the base plate or support plate, a second connector attachable to the other of the base plate or support plate, and a shaft threadably interconnecting the base and support connectors.
Claims
1. A method of making a support pedestal for adjustably supporting a building surface component above a fixed surface, comprising: receiving a first portion of a first connector in a first receiver attached to and extending away from one of a base plate of a base member or a support plate of a support member; attaching a first portion of a second connector to the other of the base plate or the support plate; threadably engaging first shaft threads of a first portion of a shaft with first connector threads of a second portion of the first connector; and threadably engaging second shaft threads of a second portion of the shaft with second connector threads of a second portion of the second connector; wherein the base member, support member, first connector, second connector and shaft collectively comprise the support pedestal; wherein rotation of the first connector adjusts a distance between the base plate and the support plate; and wherein rotation of the shaft adjusts a distance between the base plate and the support plate.
2. The method of claim 1, further including: fixedly attaching a nut to the second portion of the first connector, wherein the nut includes nut threads, and wherein the nut threads are the first connector threads.
3. The method of claim 1, further including: fixedly attaching a nut to the second portion of the second connector, wherein the nut includes nut threads, and wherein the nut threads are the second connector threads.
4. The method of claim 1, wherein the attaching the first portion of the second connector to the other of the base plate or the support plate includes: rigidly and non-rotatably securing the first portion of the second connector to the other of the base plate or the support plate.
5. The method of claim 1, wherein the attaching the first portion of the second connector to the other of the base plate or the support plate includes: inserting the first portion of the first connector into a second receiver attached to and extending away from the other of the base plate or support plate, wherein rotation of the second connector about the second connector axis adjusts a distance between the base plate and the support plate along the central axis.
6. The method of claim 1, wherein the base member, the support member and the adjustment apparatus are made of at least one of plastic, metal, carbon fiber, ceramic or a composite of materials.
7. The method of claim 1, further including: interrupting a portion of at least one of the first or second shaft threads to limit respective disengagement from the first or second connector threads.
8. The method of claim 7, wherein the interrupting includes: inserting a tool through an aperture in the first and/or second connector to contact the first and/or second shaft threads.
9. A method, comprising: providing the support pedestal of claim 1; inhibiting rotation of the shaft; and rotating, during the inhibiting, the first connector to thread the first connector threads along the first shaft threads and adjust the distance between the support plate and the base plate.
10. The method of claim 9, further including: inhibiting rotation of the second connector and the other of the base plate or support plate.
11. A method, comprising: providing the support pedestal of claim 5; inhibiting rotation of the shaft; and rotating, during the inhibiting, the second connector to thread the second connector threads along the second shaft threads and adjust the distance between the support plate and the base plate.
12. The method of claim 11, further including: inhibiting rotation of the first connector and the one of the base or support plate.
13. A method, comprising: providing the support pedestal of claim 1; first inhibiting rotation of the second connector and the other of the base plate or support plate; second inhibiting rotation of the first connector and the one of the base plate or support plate; and rotating, during the first and second inhibiting, the shaft to simultaneously respectively thread the first and second shaft threads along the first and second connector threads and adjust the distance between the support plate and the base plate.
14. An elevated building surface assembly, comprising: a plurality of the support pedestals of claim 1 disposed in spaced-apart relation on a fixed surface; and a plurality of building surface components disposed on the support plates of the support pedestals to form an elevated flooring surface.
Description
DESCRIPTION OF THE DRAWINGS
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DESCRIPTION OF THE INVENTION
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(12) The support pedestals 201 can be placed in a spaced-apart relation on fixed surfaces including, but not limited to, rooftops, plazas, over concrete slabs including cracked or uneven concrete slabs or sub-floors and can be placed within fountains and water features and the like. The elevated building surface assembly 100 can be used for both interior and exterior applications. For instance, each of the building surface components 102 may be placed upon several support pedestals 201 to elevate the building surface component 102 above the fixed surface. As illustrated in
(13) The support pedestals 201 forming the support structure 200 may be height-adjustable, fixed height, or any combination thereof and may be constructed of any appropriate materials (e.g., metals, plastics, carbon fibers, composites, etc.). Broadly, each support pedestal 201 may include a lower portion that is adapted to be placed upon a fixed surface, an upper portion for receiving a building surface component 102, and a central section extending between or otherwise interconnecting (e.g., perpendicularly) the upper and lower portions. The support pedestals 201 may be laid out in various configurations as may be dictated by the shape and size of the building surface components, such as a rectangular configuration or a triangular configuration to support rectangular or triangular building surface components.
(14) Turning now to
(15) Broadly, the support pedestal 300 may include a lower portion such as a base member 304 including a base plate 306 and a first or base receiver 308 connected to the base plate 306 in any appropriate manner and extending away from the base plate 306. The base receiver 308 may include a generally cylindrical wall 310 and an opening 312 inside the cylindrical wall 310 for receiving a first portion of the adjustment apparatus 302 via an end of the cylindrical wall 310 opposite the base plate 306 as discussed below. The support pedestal 300 may also include an upper portion such as a support member 314 including a support plate 316 and a second or support receiver 318 connected to the support plate 316 in any appropriate manner and extending away from the support plate 316. Like the base receiver 308, the support receiver 318 may include a generally cylindrical wall 320 and an opening (not shown) inside the cylindrical wall 320 for receiving an opposite second portion of the adjustment apparatus 302 via an end of the cylindrical wall 320 opposite the support plate 316 as discussed below.
(16) With continued reference to
(17) As an example, the first connector may be in the form of a base connector 324 having opposite first and second free ends 326, 328 respectively disposed on opposite first and second sections or portions 330, 332 of the base connector 324 and a first or base connector axis 334 extending through the first and second free ends 326, 328 and first and second portions 330, 332. For instance, the first portion 330 may be receivable in the opening 312 of the base receiver 308 in a direction along the base connector axis 334 and rotatable about the base connector axis 334 when received or disposed in the base receiver 308. That is, the first and second portions 330, 332 of the base connector 324 may be simultaneously rotatable about the base connector axis 334 when the first portion 330 is seated in the base receiver 308. In one arrangement, the first portion 330 may be in the form of a generally cylindrical member having an outer diameter that is just less than an inner diameter of the cylindrical wall 310 of the base receiver 308 (e.g., to limit tilting of the first portion 330 relative to the base receiver 308) so that the first portion 330 may be inserted into the base receiver 308 and rotated about the base connector axis 334.
(18) In another arrangement, the first portion 330 may be in the form of a substantially frustoconical member whose outer diameter generally decreases in a direction towards the first free end 326. For instance, and as shown in
(19) In another arrangement, a height 336 of the first portion 330 of the base connector 324 may be substantially equal to a height 338 of the cylindrical wall 310 of the base receiver 308. See
(20) The base connector 324 may be selectively non-rotatable about the base connector axis 334 when seated in the base receiver 308 for reasons discussed below. Stated differently, a user may be able to selectively inhibit rotation of the base connector 324 about the base connector axis 334 in various manners when the first portion 330 is first seated in the base receiver 308. In one arrangement, the base receiver 308 may include at least one aperture 340 through the cylindrical wall 310 through which a fastener 341 (e.g., screw, bolt, see
(21) The second portion 332 of the base connector 324 may include first or base connector threads 344 that are configured to threadably engage with corresponding threads on a threaded shaft 346 of the adjustment apparatus 302. In one arrangement, the second portion 332 may be in the form of a generally cylindrical member or wall having the base connector threads 344 on an inside surface thereof that are configured to threadably engage with corresponding threads on an exterior surface of the shaft 346. As an example, the second portion 332 may include an internally-threaded nut 348 rigidly or non-movably attached to a body 325 of the base connector 324 about the base connector axis 334 (e.g., via welding or the like). See
(22) Again with reference to
(23) In one arrangement, the support connector 354 may be substantially identical to the base connector 324. For instance, the first portion 330 of the base connector 324 may be configured to be inserted into the base receiver 308 and the second portion 332 of the base connector 324 may be configured to threadably engage with corresponding threads on a first portion of the shaft 346 while the first portion 360 of the support connector 354 may be configured to be inserted into the support receiver 318 and the second portion 362 of the support connector 354 may include second or support connector threads that are configured to threadably engage with corresponding threads on an opposite second portion of the shaft 346, or vice versa. In the interest of brevity, further discussion regarding the structure of the support connector 354 will not be provided.
(24) The shaft 346 is broadly configured to threadably engage with the base and support connectors 324, 354 to facilitate or otherwise effect adjustment between the base and support connectors 324, 354 and thus adjustment of the distance 322 between the base plate 306 and the support plate 316. More specifically, the shaft 346 broadly includes opposite first and second free ends 366, 368 respectively disposed on opposite first and second sections or portions 370, 372 of the shaft 346 and a shaft axis 374 extending through the first and second free ends 366, 368 and first and second portions 370, 372 (e.g., first and second segments, such as first and second halves). As shown, the first portion 370 includes first shaft threads 376 that are threadably engageable with the base connector threads 344 while the second portion 372 includes second shaft threads 378 that are threadably engageable with the support connector threads (not shown). Furthermore, the shaft axis 374, base connector axis 334 and support connector axis 364 are all collinear to a central axis 380 that runs through the center of the support pedestal 300 when the base and support connectors 324, 354 are respectively seated in the base and support receivers 308, 318 and the first and second threads 376, 378 of the shaft 346 are threadably engaged with the base connector threads 344 and the support connector threads (not shown). In one arrangement, the first and second threads 376, 378 of the shaft 346 may collectively extend along a substantial entirety of a length of the shaft 346 between the first and second free ends 366, 368.
(25) In one arrangement, the first and second threads 376, 378 of the shaft 346 may respectively wind in opposite or reverse directions over the outer surface of the shaft 346 along the shaft axis 374. For instance, the first threads 376 may wind in a counterclockwise direction about the outer surface of the shaft 346 (e.g., where the base connectors threads 344 are configured to threadably engage with the counterclockwise threads) while the second threads may wind in a clockwise direction about the outer surface of the shaft 346 (e.g., where the support connectors threads are configured to threadably engage with the clockwise threads), or vice versa. See
(26) To facilitate the reader's understanding of the various functionalities of the adjustment apparatus 302 of the support pedestal 300, various methods of use of the support pedestal 300 will now be discussed. With initial reference to
(27) In any case, the adjustment apparatus 302 may now be manipulated by an operator in various manners to appropriately adjust a separation between the base and support plates 306, 316 (e.g., adjust the distance 322) for purposes of achieving a level or flush building surface (e.g., building surface 101 of
(28) For instance, assume the first portion 330 of the base connector 324 is rotatable about the base connector axis 334 within the base receiver 308 (e.g., where the fastener 341 would be removed from the base receiver 308 and first portion 330). Furthermore, assume the support connector 318 is selectively fixed against rotation about the support connector axis 364 (e.g., via insertion of fastener through support receiver 318 and into contact with or through aperture in first portion 360 of support connector 354) and that the support plate 316 is loaded with one or more building surface components or is otherwise held against rotation about the central axis 380 (e.g., such as via an operator holding the support plate 316). In this regard, grasping the shaft 346 to hold the shaft 346 against rotation while simultaneously grasping the base connector 324 (e.g., such as at a location between the first and second portions 330, 332) and rotating the same about the base connector axis 334 causes the base connector threads 344 to threadingly engage the first threads 376 of the shaft 346 and linearly move the shaft 346 (and thus the support connector 354 and support member 314) in one of a first or second opposite direction along the central axis 380 relative to the base connector 324 and base member 304 to effect an adjustment of the distance 322 (e.g., an increase or decrease) between the base and support plates 306, 316.
(29) As another example, rotation of the support connector 354 about the support connector axis 364 in one of a clockwise or counterclockwise direction serves to increase or decrease the distance 322 between the base and support plates 306, 316 when the shaft 346 is held against rotation about the shaft axis 374 by moving the first free end 366 of the shaft 346 (and thus the base connector 324 and base member 304) away from or towards the support member 314 along the central axis 380. For instance, assume the first portion 360 of the support connector 354 is rotatable about the support connector axis 364 within the support receiver 318 (e.g., where the fastener, not labeled in
(30) In this regard, grasping the shaft 346 to hold the shaft 346 against rotation while simultaneously grasping the support connector 354 (e.g., such as at a location between the first and second portions 360, 362) and rotating the same about the support connector axis 364 causes the support connector threads (not labeled) to threadingly engage the second threads 378 of the shaft 346 and linearly move the shaft 346 in one of a first or second opposite direction along the central axis 380 relative to the support connector 354 and support member 314 to effect an adjustment of the distance 322 (e.g., an increase or decrease) between the base and support plates 306, 316. In the event the support plate 316 is loaded by one or more building surface components to frictionally engage the base plate 306 with the fixed surface, rotation of the support connector 354 results in the support connector threads either threading upwardly or downwardly along the second threads 378 of the shaft 346 to correspondingly linearly move the support member 314 towards or away from the base member 304 along the central axis 380.
(31) As a further example, rotation of the shaft 346 about the shaft axis 374 in one of a clockwise or counterclockwise direction serves to increase or decrease the distance 322 between the base and support plates 306, 316 when the base and support connectors 324, 354 are respectively held against rotation about the base connector and support connector axes 334, 364 by moving the base and support connectors 324, 354 (and thus the base and support members 304, 314) away from or towards each other along the shaft 346 and the central axis 380 (e.g., such as when the first and second threads 376, 378 extend in opposite directions about the shaft 346). For instance, assume the base and support connectors 324, 354 are respectively selectively fixed against rotation about the base and support connector axes 334, 364 (e.g., via insertion of fasteners through the apertures in the base and support receivers 308, 318 and into contact with or through apertures in the first portions 330, 360 of the base and support connectors 324, 354). Also assume the base and support plates 306, 316 are respectively held against rotation against the central axis 380 such as by an operator holding the base and support members 304, 314 against such rotation.
(32) In this regard, rotation of the shaft 346 about the shaft axis 374 respectively linearly pushes the base and support connectors 324, 354 (and thus the base and support members 304, 314) away from each other or pulls the base and support connectors 324, 354 (and thus the base and support members 304, 314) towards each other along the central axis 380 (and effects a corresponding adjustment of the distance 322). In the event the support plate 316 is loaded with one or more building surface components (e.g., is under at least minor compression) while the base plate 306 is frictionally disposed against a fixed surface, rotation of the shaft 346 about the shaft axis 374 in a first rotational direction allows the first threads 376 of the shaft 346 to push off against the base connector 324 along the central axis 380 to move the second free end 368 of the shaft 346 (and the support connector 354 and support member 314) away from the base member 304 while the second threads 378 push the support connector 354 (and the support member 304) along the central axis 380 away from the first free end 366 of the shaft 346, the base connector 324, and the base member 304. In contrast, rotation of the shaft 346 about the shaft axis 374 in an opposite second rotational direction allows the first threads 376 of the shaft 346 to pull against the base connector 324 along the central axis 380 to move the second free end 368 of the shaft 346 (and the support connector 354 and support member 314) towards the base member 304 while at the same time the second threads 378 pull the support connector 354 (and the support member 304) along the central axis 380 towards from the first free end 366 of the shaft 346, the base connector 324, and the base member 304. The resulting effect is an adjustment of the distance 322 between the base and support plates 306, 316 faster than operation of either of the base or support connectors 324, 354 alone.
(33) As discussed previously, one or both of the base and support connectors 324, 354 may be tiltable relative to the base and support receivers 308, 318 to facilitate appropriate leveling of the support plate 316 and thus building surface components disposed thereon relative to the elevated building surface. For instance, assume the adjustment apparatus 302 has been used as discussed in one or more of the above manners to effect a substantially appropriate adjustment of the distance 322 between the base and support plates 306, 316. Also assume that the support plate 316 (e.g., a plane within which the support plate 316 lies) is not level or flush relative to support plates 316 of adjacent support pedestals 300. In this regard, an operator may appropriately manipulate the shaft 346 and/or support member 314 to tilt or pivot the shaft 346 relative to the base receiver 308 and/or the support member 314 relative to the support connector 354 to achieve appropriate leveling of the support plate 316. In the event a fastener 341 is disposed through the base receiver 308 and/or support receiver 318, the operator may first loosen and/or remove the fasteners 341 from the base receiver 308 and/or support receiver 318 and then re-fasten/tighten the fasteners 341 to inhibit movement of the base and support connectors 324, 354 relative to the base and support receivers 308, 318.
(34) In one arrangement, the support pedestal 300 may include one or more features configured to limit removal of the first and second free ends 366, 368 of the shaft 346 from the base and support connectors 324, 354. As just one example, the base connector 324 may include one or more apertures 382 therethrough through which an operator may insert a welding gun or the like to destroy or otherwise interrupt a portion of the first threads 376 to subsequently limit passage of such portion past the base connector threads 344 and thus removal of the first free end 366 from the base connector 324. In this regard, it is noted how the base connector threads 344 (e.g., on an inside surface of the second portion 332 of
(35) That is, a portion of the first threads 376 of the shaft 346 near the first free end 366 of the shaft 346 may be in non-contact with the base connector threads 344 so that a welding gun or the like may be used to interrupt the portion of the first threads 376 for limiting removal of the first free end 366 from the base connector 324. For instance, the base connector threads may not extend along more than about 75% of a distance between the second and first free ends 328, 326, such as not along more than about 50% of a distance between the second and first free ends 328, 326. While not shown, the support connector 354 may also include one or more threads for corresponding manipulation of a portion of the second threads 378 of the shaft to limit removal of the second free end 368 from the support connector 354. Other manners of limiting removal of the first and second free ends 366, 368 of the shaft 346 from the base and support connectors 324, 354 are also envisioned and encompassed herein. In one arrangement, an operator may strike a portion of the threads of the shaft 346 with a hammer or other tool to interrupt the threads.
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(37) When the first and second base connector members 324.sub.1, 324.sub.2 are interconnected, an internal passageway may be defined therethrough from the second portion 332.sub.2 of the second base connector member 324.sub.2 to the first portion 330.sub.1 of the first base connector member 324.sub.1 into or through which the shaft 346 may extend. For instance, the first base connector 324.sub.1 may be free of base connector threads to allow the shaft 346 to pass freely therein or therethrough. Additionally or alternatively, the support connector 354 may include a plurality of support connector members such as first and second support connector members 354.sub.1, 354.sub.2. In any case, this arrangement advantageously allows an operator to increase the distance 322 between the base and support plates 306, 316 while also increasing the range of attainable distances 322 through manipulation of the adjustment apparatus 302. While one or both of the base and support connectors 324, 354 are illustrated as having two connector members, one or both of the base and support connectors 324, 354 may include more than two connector members.
(38) In one variation, the second connector of the adjustment apparatus 302 may be rigidly attached to and thus non-movable relative to the base plate 306 or support plate 316. See
(39) In one arrangement, the base and support plates 306, 316 may include one or more strengthening features disposed thereon or therein in any appropriate manner that are configured to resist bending or flexure of the base and support plates 306, 316. As an example, the base and support plates 306, 316 may respectively include ribs 386, 388 generally disposed along or near an outer periphery of the base and support plates 306, 316. See
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(41) The series of spacing components 392 may be created in any appropriate manner. For instance, each spacing component 392 may be formed by punching a punch through the support plate 316 to fold respective portions of the support plate 316 to form the respective spacer tabs 394. Stated differently, each spacer tab 394 may be punched out from the support plate 316 so as to fold a portion of the support plate 316 along a base 397 of the spacer tab 394. As used herein, the phrase punched out (and variations thereof) does not meant that each spacer tab 394 is punched in a manner so as to fully separate the spacer tab 394 from the support plate 316. Rather, each spacer tab 394 is punched in a manner so that a base 397 of each spacer tab 394 remains integrally connected (e.g., as one-piece) with the support plate 316 along the base 397.
(42) The series of spacing components 392 may additionally or alternatively be created in other manners as well. As one example, a series of apertures (not labeled, but see
(43) In one arrangement, the spacing components 392 may be created over perpendicular first and second reference axes 396, 398 along the upper surface of the support plate 316 (e.g., that are each perpendicular to a central axis 400 through the support plate 316, the central axis 400 being perpendicular to the first and second opposite surfaces 391, 393) to allow for four surface components 102 (only one shown in
(44) As illustrated, each spacer tab 394 may be angled relative to the axes 396, 398 to define a particular spacing 399 between adjacent surface components 102 that is greater than a thickness 395 of the spacer tabs 394 themselves. That is, rather than creating the spacer tabs 394 so that a base 397 (e.g., an axis extending along the base 397) of each spacer tab 394 is generally collinear with a respective one of the axes 396, 398, each base 397 may be disposed at a non-zero angle to its respective axis 396, 398, such as at 30, 45, 60, and/or the like. For instance, manufacturers may be able to create the spacing components 392 at a particular angle to achieve a particular desired surface component spacing 399.
(45) While not shown, the support plate 316 may include one or more ribs 388 (e.g., from
(46) The support pedestal 300/300 may be constructed of any appropriate materials and in any appropriate manner. In one arrangement, the various components of the support pedestal (e.g., the base and support members 304, 314 and the adjustment apparatus 302) may be constructed of any appropriate fire resistant and/or noncombustible materials(s) such as metals (e.g., steel), carbon fiber, other suitable materials, and/or the like. In one arrangement, the various components of the support pedestal may be noncombustible as defined in ASTM International Designation E136-12.
(47) The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit the invention to the form disclosed herein. Consequently, variations and modifications commensurate with the above teachings, and skill and knowledge of the relevant art, are within the scope of the present invention. For instance, while the base connector threads 344 and support connector threads are shown and/or discussed as respectively beginning at the second free ends 328, 358 of the base and support connectors 324, 354, other arrangements envision that the base connector threads 344 and support connector threads begin inside of the second free ends 328, 358 (e.g., are recessed or inset relative to the second free ends 328, 358). As another example, the base and support connector threads may in some arrangements be disposed on an outside portion of the second portions 332, 362 of the base and support connectors 324, 354, respectively. In this arrangement, the shaft 346 would be in the form of an internally threaded shaft having first and second threads on the inside thereof respectively configured to engage with the externally threaded base and support connectors 324, 354.
(48) As another example, the first portions 330, 360 of the base and support connectors 324, 354 may be configured to respectively receive and be selectively rotatable about base and support shafts extending away from the base and support plates 306, 316. For instance, the base and support receivers 308, 318 may be replaced by base and support shafts that are configured to be inserted into or received by the first portions 330, 360 of the base and support connectors 324, 354. The first portions 330, 360 may be generally cylindrical members having an inner diameter that is just greater than an outer diameter of the base and support shafts. To selectively inhibit rotation of the base and support connectors 324, 354 about the base and support shafts, fasteners or the like may be inserted through aligned apertures therethrough. In one arrangement, the body of each of the base and support connectors may have a generally constant outer diameter between the first and second free ends.
(49) As a further example, the base member 304 may be identical or substantially identical to the support member 314 and the base connector 324 may be identical or substantially identical to the support connector 354 to limit manufacturing costs and/or complexities. Still further, while the base and support plates 306, 316 are illustrated as being circular, the base and support plates 306, 316 may take various other shapes as well (e.g., square, hexagonal, etc.). Moreover, while the base and support plates 306, 316 are illustrated as including ribs 386, 388 and the support plate 316 is further illustrated as including four elongated apertures (not labeled) therein or therethrough, some embodiments envision that the base and support plates 306, 316 do not include ribs and/or such apertures.
(50) In one arrangement, one or more of the connectors (e.g., first connector 324, second connector 354) may include an additional third portion between the first and second portions having a diameter between that of the first and second portions. For instance, the first connector 324 may have a third portion between the first and second portions 330, 332, where a first swaged portion of the first connector 324 connects the first and third portions and a second swaged portion connects the third and second portions. Among other advantages, this arrangement allows for the degree of tilting of the first portion 330 in the base receiver 308 to be limited to a particular range.
(51) It is also to be understood that the various components disclosed herein have not necessarily been drawn to scale. Also, many components have been labeled herein as first, second, third, etc. merely to assist the reader in understanding the relationships between the components and does not imply that an elevated building surface assembly encompassed herein need necessarily have the specific arrangements shown and described herein.
(52) One or more various combinations of the above discussed arrangements and embodiments are also envisioned. While this disclosure contains many specifics, these should not be construed as limitations on the scope of the disclosure or of what may be claimed, but rather as descriptions of features specific to particular embodiments of the disclosure. Furthermore, certain features that are described in this specification in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a sub combination.