The present disclosure generally relates to remote control vehicles, to remote controls for use with the remote control vehicles, and to arenas in which the remote control vehicles can be operated to engage stunts and perform acrobatic maneuvers (e.g., jumps, flips, rolls, etc.).
This section provides background information related to the present disclosure which is not necessarily prior art.
Remote control vehicles are available for racing, jumping, and performing other actions. Such vehicles may be used in environments without barriers (e.g., in open rooms, in open lots, etc.). Or, such vehicles may be used in environments with barriers (e.g., race tracks, etc.) in which the vehicles move (e.g., race, etc.) repeatedly around pre-defined paths (e.g., for time, for speed, against other vehicles, etc.).
This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.
The present disclosure is generally directed toward arenas in which remote control vehicles can be used. In one example embodiment, a stunt arena for use with a remote control vehicle generally includes multiple stunts engageable by the remote control vehicle within the stunt arena to perform acrobatic maneuvers within the stunt arena.
The present disclosure is also generally directed toward assemblies comprising remote control vehicles and arenas. In one example embodiment, such an assembly generally includes a remote control vehicle and an arena. The arena has fences disposed along part of an outer portion of the arena and stunts disposed along part of the outer portion of the arena generally between the fences. The remote control vehicle is operable in the arena to engage the stunts and perform acrobatic maneuvers within the arena.
The present disclosure is also generally directed toward remote controls for use with remote control vehicles. In one example embodiment, such a remote control generally includes a charging port for receiving and charging a battery of a remote control vehicle (e.g., a remote control vehicle associated with the remote control, etc.).
The present disclosure is also generally directed toward remote control vehicles. In one example embodiment, such a remote control vehicle is configured for use with an arena comprising multiple stunts engageable by the remote control vehicle to perform acrobatic maneuvers within the arena. The remote control vehicle includes a chassis and wheels coupled to the chassis. The wheels of the remote control vehicle are not steerable.
Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.
Corresponding reference numerals indicate corresponding parts throughout the several views of the drawings.
Example embodiments of the present disclosure generally relate to arenas for remote control vehicles. The vehicles are generally user controlled. And, the arenas include various stunts (e.g., ramps, jumps, barrels, loops, tunnels, etc.), where the vehicles are free to move throughout the arenas to engage the stunts and perform desired maneuvers (e.g., jumps, flips, rolls, etc.). The stunts can be arranged in various desired play patterns. What's more, the vehicles are free to drive anywhere in the arenas (in any desired paths, patterns, etc.) to engage the stunts in any desired order, combination, etc. and/or at any desired angle, speed, etc. As such, the movement of the vehicles around the arenas is substantially free-form (e.g., free of slots in the arenas, guides in the arenas, specific track patterns in the arena, etc. that would control, direct, dictate, etc. specific paths of movement of the vehicles in the arenas, etc.).
Example embodiments of the present disclosure also generally relate to remote control vehicles and remote controls for use with such vehicles, where the remote control vehicles can be used in arenas of the present disclosure (via control using the remote controls). In some aspects, the remote controls including charging ports for charging batteries used to operate the remote control vehicles. As such, one battery can be installed to vehicles being controlled by a remote control and another vehicle battery can be plugged into a charging port of the remote control for charging.
With reference now to the drawings,
The illustrated vehicle 100 generally includes a chassis 102 having a frame 104, forward wheels 106, rearward wheels 108, and a drive motor 110 (with suitable gearing). A forward portion of the frame includes a bumper 114, and a rearward portion of the frame defines a compartment configured to house the drive motor 110. A central portion of the frame defines a compartment for holding a battery 118 (e.g., via clips, etc.) used to power the drive motor 110 of the vehicle 100. The battery 118 of the vehicle 100 is a removable and rechargeable battery 118 (e.g., a rechargeable lithium-polymer battery, etc.). And, the battery 118 is configured to be easily installed into and removed from the vehicle 100. Wiring (e.g., via quick connect electrical connections, etc.) is provided to couple the battery 118 to the drive motor 110 to provide power. A switch 120 is provided to activate/deactivate power to the vehicle 100 as desired.
The drive motor 110 of the vehicle 100 is configured to operate the rearward wheels 108 of the vehicle 100. In one operational setting, the drive motor 110 can operate the rearward wheels 108 of the vehicle 100 in a forward direction (e.g., in a counter-clockwise direction as viewed in
The vehicle 100 also includes a controller configured to direct operation of the vehicle 100 (e.g., by controlling the drive motor 110, etc.). For example, the controller may direct desired movement of the vehicle 100 (e.g., generally forward movement of the vehicle 100, generally backward movement of the vehicle 100, etc.), speed of the vehicle 100, power to the vehicle 100, various combinations thereof, other desired operations associated with the vehicle 100, etc. In so doing, the controller may receive and/or send information (e.g., via radio signals, via infrared signals, etc.) from and/or to a remote control associated with the vehicle 100.
In addition, the controller is also configured to perform failsafe functions relating to the operation of the vehicle 100. For example, the controller may monitor charge level of the battery 118 and provide an indication, warning, etc. if it falls below a predetermined threshold. Among other things, this can help prevent damage to the battery 118 and/or help prolong operational life of the battery 118. The controller may also monitor rotation of the wheels 106 and/or 108 of the vehicle 100 and deactivate power to the drive motor 110 if the wheels 106 and/or 108 are stopped, for example, by an outside force, etc. for a predetermined period of time (e.g., to help prevent the drive motor 110 from becoming damaged, etc.). The controller may then reactivate power to the drive motor 110 after the drive motor 110 completely stops.
With continued reference to
The vehicle 100 also includes a light 122 coupled to the frame 104. The light 122 is configured to illuminate a path in which the vehicle 100 is moving. The light 122 can include any desired light within the scope of the present disclosure, for example, white light, ultraviolet light, black light, etc. In addition, while only one light 122 is illustrated in
In the illustrated embodiment, the drive motor 110 of the vehicle 100 is a variable speed motor 110. As such, the drive motor 110 can operate the rearward wheels 108 of the vehicle 100 at different speeds, thereby allowing the vehicle 100 to move at different desired speeds (e.g., across an arena, into engagement with stunts, etc.). In other example embodiments, vehicles may include constant speed drive motors, or any other suitable drive motors, within the scope of the present disclosure.
Also in the illustrated embodiment, neither the forward wheels 106 nor the rearward wheels 108 of the vehicle 100 are steerable. As such, the vehicle 100 is configured for movement only generally forward and only generally backward (depending on the operational setting of the drive motor 110). In other example embodiments, however, vehicles may include forward wheels and/or rearward wheels that are steerable within the scope of the present disclosure (e.g., via a remote control, etc.).
The illustrated remote control 230 generally includes a handle 232 and a trigger 234 (broadly, an actuator) arranged in a pistol-type configuration. A suitable communication device is provided with the remote control 230 for communicating (e.g., via radio signals, infrared signals, etc.) with a remote control vehicle (e.g., with the controller of vehicle 100, etc.) and controlling operation of the vehicle. The handle 232 includes a port for receiving batteries (e.g., AA batteries, etc.) to power the remote control 230. In other example embodiments, remote controls may have configurations other than pistol-type configurations.
In use, the remote control 230 is configured to operate a remote control vehicle without steering (e.g., the remote control vehicle 100, etc.). As such, actuating the trigger 234 forward and backward functions to control, change, etc. movement of the vehicle (e.g., controls operational settings of a drive motor of the vehicle to control speed, direction, etc. of the vehicle, etc.). For example, pulling the trigger 234 toward the handle 232 drives the vehicle generally forward, and pushing the trigger 234 away from the handle 232 drives the vehicle generally backward. What's more, where the vehicle includes a variable speed drive motor (as in vehicle 100), the remote control 230 allows for variable speed operation of the vehicle, where pulling the trigger 234 slightly moves the vehicle slowly, and pulling the trigger 234 all the way moves the vehicle at max speed. In addition, where the vehicle is configured to drive right-side up and upside down (and includes a tilt switch, as in vehicle 100), pulling the trigger 234 toward the handle 232 drives the vehicle generally forward regardless of whether the vehicle is right-side up or upside down, and pushing the trigger 234 away from the handle 232 drives the vehicle generally backward regardless of whether the vehicle is right-side up or upside down. In other example embodiments, remote controls may be configured to control vehicles in which wheels of the vehicles are steerable. Here, the remote controls may then include features for steering the vehicles (e.g., wheels, knobs, other actuators, etc.).
The remote control 230 also includes a charging port 238 configured to receive and charge a battery 218 (
As shown in
The tiles 352a, 352b define inner tiles of the arena 350, and the tiles 352c, 352d define outer tiles of the arena 350. The outer tiles 352c, 352d are positioned generally around the inner tiles 352a, 352b at various locations to define part of an outer boundary of the arena 350. In addition in the illustrated embodiment, the outer tiles 352c are curved outer tiles, and the outer tiles 352d are straight outer tiles. The curved outer tiles 352c are positioned generally toward end portions of the arena 350, and the strait outer tiles 352d are positioned generally between the curved outer tiles 352c.
Each of the outer tiles 352c, 352d of the arena 350 includes a raised lip 362 extending along outer side portions of the tiles 352c, 352d. Fences 364 are coupled to the lips 362 of the outer tiles 352c, 352d. In the illustrated embodiment, the fences 364 include legs 366 configured to fit into corresponding openings 368 in the lips 362 of the outer tiles 352c, 352d to secure the fences 364 to the tiles 352c, 352d. In addition, the fences 364 include side tabs configured to interlock adjacent fences 364 together (and help secure adjacent tiles 352c, 352d together). Together, these features help further secure the tiles 352c, 352d of the arena 350 together, to thereby provide smooth transitions between the fences 364 and the lips 362 of the outer tiles 352c, 352d and between the adjacent fences 364. In other example embodiments, arenas may include fences with other structures (e.g., other configurations of fasteners, other configurations of tabs on fences, other numbers of tabs on fences, etc.) configured to couple the fences to tiles, to adjacent fences, etc. as desired. And in still other example embodiments, arenas may include tiles with fences formed integrally, monolithically, as one piece, etc. therewith.
The outer tiles 352c, 352d of the arena 350 also include markings 353 that may be illuminated by lights (e.g., light 122, etc.) of the vehicle 300 when the vehicle 300 is moving around the arena 350. In some aspects, the markings 353 may further include luminous materials (e.g., paints, markings, adhesives, etc.), luminescent materials (e.g., paints, markings, adhesives, etc.), or other materials that give off visible light through fluorescence, phosphorescence, radio luminescence, etc. Further, the lights of the vehicle 300 may include lights configured to make at least part of the markings 353 become visible (or become more visible) and/or glow when illuminated by the lights. As such, in these aspects, the vehicle 300 can leave a visible trail across the arena 350, with the lighted, glowing, etc. markings 353 generally indicating a path of travel for the vehicle 300 in the arena 350. In other example embodiments, the tiles 352a, 352b may also include markings 353. It should be appreciated that any desired arrangement of markings 353 can be used in the present disclosure.
With reference to
As also shown in
With reference to
The stunt 354c allows the remote control vehicle 300 to perform a generally vertical jump (e.g., a jump to achieve maximum vertical height, etc.) (
And, with reference to
In
In the illustrated embodiment, the fences 364 are positioned on the lips 362 of the outer tiles 352c, 352d of the arena 350 (generally along a portion of the outer boundary of the arena 350). And, the stunts 354a-d are configured to be positioned between select ones of the outer tiles 352c, 352d at locations generally along the outer boundary of the arena 350 (between sections of fences 364). The illustrated stunts 354a-d also include fence portions that are capable of coupling to the fences 364. As such, the perimeter of the arena 350 is generally defined by both fences 364 and select stunts 354a-d, and thus includes portions with the fences 364 (e.g., along the lips 362 of the outer tiles 352c, 352d, etc.) and portions without fences (e.g., at the stunts 354a-d, etc.). Further, the fences 364 and select stunts 354a-d also define a generally open area for driving a remote control vehicle in the arena. And in the illustrated embodiment, this area is not a loop (or donut) configuration, and could be any configured desired by a user.
The fences 364 also define a generally partial barrier along the outer tiles 352c, 352d which helps keep the remote control vehicle 300 in the arena 350 (e.g., helps prevent the vehicle 300 from bouncing out of the arena 350 at the outer tiles 352c, 352d, etc.) when driving in the arena 350, when performing maneuvers in the arena 350, etc. In addition, the lips 362 and/or fences 364 also operate to help guide the vehicle 300 in the arena 350 toward the stunts 354a-d. For example, as the vehicle 300 is driving around the arena 350, it engages a portion of the lips 362 and/or the fences 364 which then tends to guide the vehicle 300 toward one of the stunts 354a-d by maintaining generally steady contact with a portion of the vehicle 300 while the vehicle 300 moves therealong. In other example embodiments, arenas may include stunts positioned at inner locations of the arenas and/or along outer boundaries of the arenas. In still other example embodiments, stunts may be formed by hooking flexible sheets of plastic into guides of frames to form the desired stunts (e.g., jumps, loops, etc.).
The fences 364 are also configured to allow viewing the remote control vehicle 300 in the arena 350 through the fences 364 (e.g., the fences 364 are formed with openings therein, etc.). This allows users to view action in the arena 350 without obstruction from the fences 364. This also allows users to maintain continuous control of the vehicle 300 in the arena 350 (e.g., helps maintain a line of sight between a remote control and the vehicle 300 in the arena 350 for transmission/reception of operational signals, etc.) without obstruction from the fences 364.
Also in the illustrated embodiment, the tiles 352a-d and the stunts 354a-d of the arena 350 are arranged generally in a grid system to form the driving area of the arena 350. As part of this arrangement, the tiles 352a-d and the stunts 354a-d are uniquely sized so that they can be positioned to easily form desired configurations for the arena 350. With that said, the illustrated tiles 352a-d and stunts 354a-d are either full size, half size, or quarter size. Specifically, the tiles 352b, 352c are full size; the tiles 352a, 352d and the stunt 354d are half size; and the ramps 372a, 372b forming stunts 354a-c are quarter size (with the resulting stunts 354a-c actually being half size).
Further in the illustrated embodiment, the ramps 372a, 372b of each of the stunts 354a-c are generally the same and can be interchanged and used in connection with any of the stunts 354a-c. In addition, the extenders 374, 376 and the barrel section 380 of stunts 354b, 354c can be interchanged with any of the ramps 372a, 372b as desired. As such, the stunts 354a-c can be reconfigured as desired to allow remote control vehicles to perform different maneuvers, etc.
In use of the arena 350, remote control vehicle 300 can be operated in the arena 350 to engage the stunts 354a-d and perform various maneuvers, as desired. The vehicle 300 can move around the floor of the arena 350 and engage the stunts 354a-d at desired speeds, angles, etc. The operator can move the vehicle 300 around the arena 350 in any way desired and through the various stunts 354a-d in any desired order, speed, etc. The movement of the vehicle 300 is substantially free-form. What's more, the generally enclosed environment of the arena 350 allows users to quickly perform repeated stunts 354a-d. Moreover, the stunts 354a-d are configured to allow the vehicle 300 to perform areal acrobatic maneuvers. For example, users operating the vehicle 300 may increase, decrease, reverse, etc. operational power to a drive motor of the vehicle 300 to thereby modify, create, etc. a torque on the vehicle 300 as the vehicle 300 jumps in the air to cause the vehicle 300 to perform acrobatic maneuvers in the air. And still further, the stunts 354a-d may be configured to direct the vehicle 300 out of the arenas (e.g., into other arenas, to other desired locations, etc.) as desired.
In example embodiments of the present disclosure where remote control vehicles used in the arenas do not include steering (e.g., remote control vehicle 100, 300, etc.), a user can still perform numerous stunts in the arenas by simply actuating a trigger of a remote control associated with the vehicle (e.g., for an extended period of time, etc.). In addition, over time the user may learn how to control the vehicle with some finesse (eventhough the vehicle does not include steering). For example, the user may learn that the vehicle can be freed when it gets hung up on a stunt by driving in reverse, or the user may learn to control flight characteristics of the vehicle (after jumping into the air) by changing the speed and direction of a drive motor of the vehicle in midair, etc.
In other example embodiments, radio frequency identification (RFID) readers and/or optical readers may be installed in arenas (e.g., in tiles of the arenas, in fences of the arenas, in stunts of the arenas, etc.) to sense, for example, locations of remote control vehicles in the arenas, when remote control vehicles jump out of the arenas, etc.). In embodiments where the readers sense when remote control vehicles jump out of the arenas, the readers may then communicate with the vehicles after they jump out of the arenas to stop power to the vehicles.
In still other example embodiments, arenas may include more stunts or less stunts than disclosed herein. In addition, other example embodiments may include arenas with stunts different from those disclosed herein (e.g., tunnels, other stunts configured to launch a remote control vehicle into the air, other stunts configured to allow a remote control vehicle to perform an acrobatic maneuver, etc.).
Components of the arena 450 of this embodiment are substantially similar to those described in connection with the arena 350 illustrated in
In addition, the stunt 454a includes a pair of generally aligned and spaced apart ramps 472a, 472b which allows a remote control vehicle in the arena 450 to jump from one ramp 472a, 472b to the other ramp 472a, 472b (e.g., over a portion of the arena 450, etc.). The stunt 454b includes a quarter pipe section 482 which allows a remote control vehicle in the arena 450 to perform jumps, rolls, etc. depending on an angle upon which the vehicle engages the quarter pipe section 482. The stunt 454c (two versions of stunt 454c are included in the arena 450) also includes a pair of ramps 472a, 472b oriented generally back-to-back, and extenders 474, 476 coupled to upper portions of the ramps 472a, 472b. Each stunt 454c allows a remote control vehicle in the arena 450 to perform a generally vertical jump (e.g., a jump to achieve maximum vertical height, etc.). And, the stunt 454d includes a pair of ramps 472a, 472b oriented generally back-to-back, and a barrel section 480 coupled to upper portions of the ramps 472a, 472b. This stunt 454d allows a remote control vehicle in the arena 450 to perform generally horizontal jumps, either right-side up or upside down.
The arena 450 of this embodiment further includes stunts 454e, 454f. The stunt 454e includes a pair of ramps 472a, 472b oriented generally back-to-back. This stunt allows a remote control vehicle in the arena 450 to jump, for example, from one ramp 472a, 472b to the other ramp 472a, 472b, etc. And, the stunt 454f includes a pair of ramps 472a, 472b spaced apart with a quarter pipe section 482 positioned therebetween. Sloped extenders 490, 492 are coupled to upper portions of the ramps 472a, 472b, and a scoop extender 494 is coupled to an upper portion of the quarter pipe section 482. In one aspect, this stunt 454f allows a remote control vehicle in the arena 450 to perform a generally vertical, twisting jump (e.g., a jump that launches a remote control vehicle upwardly and inwardly, etc.). For example, the vehicle can engage (and take off from) ramp 472a (and its corresponding sloped extender 490) and jump upwardly into the air and inwardly (to the right in
In addition in this embodiment, the stunt 454f can be modified by removing the sloped extenders 490, 492 and/or scoop extender 494 from the respective ramps 472a, 472b and quarter pipe section 482. In one aspect, the stunt 454f then includes the ramps 472a, 472b for a remote control vehicle in the arena 450 to perform basic jumps (e.g., jumps from the arena 450 to an adjacent arena, jumps out of the arena 450, etc.), and the quarter pipe section 482 for the vehicle to perform generally vertical jumps and/or rolls. In another aspect, the arena 450 (with the modified stunt 454f) can be positioned with the modified stunt 454f against a wall. Here, the vehicle in the arena 450 can engage the stunt 454f and drive generally up the wall.
As shown in
Fences 564 can also be coupled to the body 586 of the stunt 554g (
When included in an arena (
The ramp 588 of the stunt 554g is generally arcuate in shape, and provides a platform to launch the remote control vehicle 500 into the air when using the stunt 554g. Ribs 588b are provided along a lower portion of the ramp 588 to help reinforce the ramp 588. The ramp 588 can be formed having any desired angle, or combination of angles, to facilitating launching the vehicle 500. The illustrated ramp 588 includes a generally changing angle that defines a scoop or generally “U” shaped configuration. Alternatively, the ramp 588 may have shallower angles if it is desired to launch the vehicle 500 in a more horizontal direction, or if the vehicle 500 is relatively long (e.g., to help inhibit the vehicle from dragging when it engages the ramp, etc.). Or, the ramp 588 may have steeper angles if it is desired to launch the vehicle 500 in a more vertical direction, or if the vehicle 500 is relatively short. In other example embodiments, stunts may include ramps with shapes other than illustrated herein, for example, generally planar shapes with generally constant angles, etc.
With additional reference to
In
In some example embodiments, remote control vehicles may include lights (e.g., ultraviolet lights, etc.) included therewith (e.g., mounted to frames of the vehicles, etc.) configured to illuminate portions of arenas in which the vehicles are operated (e.g., portions of the arenas comprising luminous materials (e.g., paints, markings, adhesives, etc.); luminescent materials (e.g., paints, markings, adhesives, etc.); other materials that give off visible light through fluorescence, phosphorescence, radio luminescence, etc.; etc.). In addition, in some aspects of these embodiments, the arenas may include markings that become visible (e.g., glow, etc.) when illuminated by the lights on the vehicles, thereby leaving trails indicating paths of travel for the vehicles.
Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods, to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.
The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms “a,” “an,” and “the” may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises,” “comprising,” “including,” and “having,” are inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It is also to be understood that additional or alternative steps may be employed.
When an element or layer is referred to as being “on,” “engaged to,” “connected to,” or “coupled to” another element or layer, it may be directly on, engaged, connected or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being “directly on,” “directly engaged to,” “directly connected to,” or “directly coupled to” another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as “first,” “second,” and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
Spatially relative terms, such as “inner,” “outer,” “beneath,” “below,” “lower,” “above,” “upper,” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, the example term “below” can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same may also be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
This application claims the benefit of and priority to U.S. Provisional Application No. 61/762,058, filed on Feb. 7, 2013. The entire disclosure of the above application is incorporated herein by reference.
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