Patent Application
20190343317
This invention relates generally to delivering products ordered by consumers via unmanned vehicles and, in particular, to systems and methods of storing packages dropped off by unmanned vehicles in receptacles and for dispensing the packages from the receptacles.
An increasing number of retail providers is considering product delivery using unmanned vehicles (e.g., unmanned aerial vehicles (UAVs), unmanned ground vehicles (AGVs), etc.). The unmanned vehicles may deliver products to the homes of the customers and drop off the products onto the customer's driveway, front yard, and/or porch. Such deliveries are associated with the risk of the dropped off packages being stolen while the customer is not home. The unmanned vehicles may also deliver products to secured locations (e.g., delivery lockers, kiosks, etc.) located near the customer's home, enabling the customer to stop by the pick-up location and retrieve the delivered products from the delivery locker or kiosk by entering an access code provided in advance to the consumer. Conventional delivery lockers and kiosks rely on a complicated physical structure and are controlled by complicated electronic/computer systems. Such delivery lockers and kiosks are expensive to install and therefore may not be economically feasible to install in many communities.
Disclosed herein are embodiments of systems, apparatuses and methods pertaining to receiving packages containing products ordered by customers in receptacles and for dispensing the packages from the receptacles. This description includes drawings, wherein:
Elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For example, the dimensions and/or relative positioning of some of the elements in the figures may be exaggerated relative to other elements to help to improve understanding of various embodiments of the present invention. Also, common but well-understood elements that are useful or necessary in a commercially feasible embodiment are often not depicted in order to facilitate a less obstructed view of these various embodiments of the present invention. Certain actions and/or steps may be described or depicted in a particular order of occurrence while those skilled in the art will understand that such specificity with respect to sequence is not actually required. The terms and expressions used herein have the ordinary technical meaning as is accorded to such terms and expressions by persons skilled in the technical field as set forth above except where different specific meanings have otherwise been set forth.
Generally speaking, pursuant to various embodiments, systems and methods are provided for receiving, from unmanned vehicles, packages containing products ordered by customers in secure receptacles, and for dispensing the packages from the receptacles.
In some embodiments, a receptacle for receiving, from unmanned vehicles, packages containing products ordered by customers, and for dispensing the packages therefrom comprises a movable access panel configured to move, from a closed position that restricts access to an interior of the receptacle, to an open position that permits a product-containing package being dropped off by an unmanned vehicle to be deposited into a first storage compartment located in the interior of the receptacle. The first storage compartment is configured to retain the package deposited therein as a result of movement of the access panel into the open position. The first storage compartment includes a customer access opening restricted by a movable cover configured to open, in response to the customer entering an access code, and to permit the customer to retrieve the package from the first storage compartment though the customer access opening. The first storage compartment further includes a release panel movable from a closed position that retains the package in the first storage compartment to an open position that releases the package from the first storage compartment into a second storage compartment located in the interior of the receptacle. The second storage compartment is separated from the first storage compartment by the release panel and including a delivery service access opening restricted by a movable cover configured to open and permit a delivery service operator to retrieve the package from the second storage compartment through the delivery service access opening. The receptacle further includes a control unit including a processor and operatively coupled to the release panel, the control unit being programmed to cause the release panel to move from the closed position to the open position after a predefined interval of time of the package being retained in the first storage compartment without being retrieved by the customer
In some embodiments, a method of receiving in receptacles, from unmanned vehicles, packages containing products ordered by customers, and for dispensing the packages to the customers from the receptacles, comprises: moving a movable access panel of the receptacle from a closed position that restricts access to an interior of the receptacle, to an open position that permits a product-containing package being dropped off by an unmanned vehicle to be deposited into a first storage compartment located in the interior of the receptacle, retaining the package in the first storage compartment after the package is deposited into the first storage compartment as a result of movement of the access panel into the open position; providing the first storage compartment with a customer access opening restricted by a movable cover; opening the movable cover of the first storage compartment in response to the customer entering an access code and permitting the customer to retrieve the package from the first storage compartment though the customer access opening; providing the first interior compartment with a release panel movable from a closed position that retains the package in the first storage compartment to an open position that releases the package from the first storage compartment into a second storage compartment located in the interior of the receptacle; providing the second storage compartment with a delivery service access opening restricted by a movable cover configured to open and permit a delivery service operator to retrieve the package from the second storage compartment through the delivery service access opening; providing a control unit including a processor and operatively coupled to the release panel; and causing, via the control unit, the release panel to move from the closed position to the open position after a predefined interval of time of the package being retained in the first storage compartment without being retrieved by the customer.
In the embodiment illustrated in
While the exemplary receptacle 120 of
In some aspects, each of the first and second storage compartments 124 and 126 may include vertical partition panels that divide each of the first and second storage compartments 124 and 126 into two or more (e.g., 3, 4, 5, 6, etc.) smaller compartments each configured to retain one or more product-containing packages 190. The subdivision of the first and second storage compartments 124 and 126 may be useful in situations, where the receptacle is used to retain packages 190 associated with multiple different customer orders for pick up by different customers 110, thereby providing a customer 110 with access to only one sub-compartment (where his or her packages 190 are retained) while not providing the customer 110 with access to any of the other sub-compartments (which retain packages 190 for other customers 110). In such embodiments, the access panel 128 may be configured in the form of multiple access sub-panels each aligned with their respective sub-compartments such that movement of each of the sub-panel results in a package 190 to drop into its respective sub-compartment.
In some embodiments, the receptacle 120 is configured such that the first storage compartment 124 is configured to store product-containing packages 190 dropped off (i.e., deposited) by an unmanned vehicle (e.g., a UAV, AGV, or the like), and the second storage compartment 126 is configured to store product-containing packages 190 that were transferred from the first storage compartment 124 and are being retained in the second storage compartment 126 for pick up by a product delivery service worker (or an unmanned vehicle).
In the embodiment illustrated in
In order to permit product-containing packages 190 to be deposited (e.g., by unmanned vehicles or delivery service workers) into the first storage compartment 124, the first storage compartment 124 includes an access panel 128 that is movable from a closed position obstructing access to the interior of the first storage compartment 124 to an open position providing access for one or more packages 190 being deposited into the interior of the first storage compartment 124. In some embodiments, the access panel 128 is configured such that movement of the access panel 128 from the closed position (shown in
In the illustrated embodiment, the access panel 128 is shown as being located in the top-most panel 130 of the receptacle 120, but it will be appreciated that in some embodiments, the receptacle 120 may be configured such that the movable access panel 128 is formed in any of the other panels (e.g., front-facing panel 132, rear-facing panel 134, first side panel 136, or second side panel 138) of the receptacle 120 that enclose the first storage compartment 124. It will also be appreciated that while the top-most panel 130 is illustrated in
With reference to
In the illustrated embodiment, the receptacle 120 includes a processor-based control unit 150 (e.g., microcontroller) configured for communication with other electronic devices of the receptacle to facilitate various functions of the receptacle 120 as will be described in more detail below. With reference to
In an embodiment (as in
In the embodiment shown in
In some embodiments, the display screen 460 of the control unit 150 is also configured to permit the user to see various graphical interface-based menus, options, and/or alerts that may be displayed to the customer 110 by the control unit 150 in connection with the customer 110 attempting to gain access to the package 190 stored in the first storage compartment 124 of the receptacle 120. It will be appreciated that the display screen 460 may, in some embodiments, be configured as both a display screen and an input 470 (e.g., a touch-screen that permits the customer 110 to press directly on the display screen 460 to enter text and/or execute commands.)
The user interface 450 of the control unit 150 may also include a speaker 490 that may provide audible feedback (e.g., alerts) to the customer 110. For example, in some embodiments, the control unit 150 may be programmed to generate an audible query to the consumer via the speaker 490, prompting the customer 110 to verbally speak the verification code (e.g., provided to the customer by the server 160) in order to enable the verification of the identity of the customer 110, and to permit the customer 110 to gain access to the first storage compartment 124 via movement of the customer access opening 154 (the movable cover 156 of which is moved in some embodiments by a signal sent by the control unit 150 after the customer 110 is verified).
In some embodiments, the input/output 440 of the control unit 150 is a transmitter configured to transmit (e.g., over the network 165) a signal to the server 160 including the verification code provided by the customer 110, after which the server 160 queries the electronic database 170 to determine whether the verification code stored in the electronic database 170 in association with the customer 110 matched the verification code provided by the customer 110.
In some embodiments, the receptacle 120 is configured such that placement of the package 190 into direct contact with the upper-facing surface of the access panel 128 is not required in order to cause the access panel 128 to move from the closed position to the open position and permit the package 190 to drop into the first storage compartment 124. Instead, the receptacle 120 according to some embodiments includes a package proximity sensor 152 configured to detect a proximity of the package 190 being dropped off (e.g., by the unmanned vehicle 180, delivery service worker, etc.), and the receptacle 120 is configured such that, in response to the package proximity sensor 152 detecting a proximity of the product-containing package 190, the access panel 128 moves from the closed position into the open position and allows the product-containing package 190 to be deposited into the first storage compartment 124 through an access opening 129 provided by the movement of the access panel 128 from the closed position to the open position.
In the exemplary receptacle 120 illustrated in
The package proximity sensor 152 may be a motion-detecting sensor, a photo sensor, a radio frequency identification (RFID) sensor, an optical sensor, a barcode sensor, a digital camera sensor, or a spectrometric sensor. In one embodiment, the package proximity sensor 152 includes a digital camera sensor configured to snap a still photo or record a moving video of the package 190 during the movement of the package 190 toward the access panel 128, and to transmit a signal including the still photo and/or the moving video of the package 190 to a control unit 150 (discussed in more detail below) which then enables the control unit 150 to determine whether the package 190 will fit through the access opening 129 provided by the movement of the access panel 128 of the receptacle 120 from the closed position to the open position.
In some embodiments, the package proximity sensor 152 includes a first sensor configured to detect movement of a package 190 toward the access panel 128 (e.g., by an unmanned vehicle 180 a person, etc.), and a second sensor configured to scan the overall shape of the package 190 and/or scan identifying indicia 192 located on the package 190 when the package 190 is located proximate the access panel 128 and/or otherwise within the detecting range of the package proximity sensor 152. In one exemplary embodiment, the first sensor is configured to activate the second sensor in response to detection, by the first sensor, of the movement of the package 190 toward the access panel 128 of the receptacle 120, such that the second sensor may be inactive until being activated by the first sensor, which conserves battery power that would be consumed if the second sensor were on constantly. In some embodiment, the receptacle 120 may be coupled to one or more solar panels to enable solar-based charging of the electronic components (e.g., sensors, control unit, etc.) of the receptacle 120.
With reference to
In some aspects, the movable cover 156 opens in response to the customer 110 entering verification data (e.g., into an interface provided on the receptacle or via a mobile electronic device 115 of the consumer) and permits the customer 110 to retrieve the package 190 from the first storage compartment 124 though the customer access opening 154. In particular, in some embodiments, the receptacle 120 is configured to, in response to either a control signal from the control unit 150, or a verification input (e.g., verification code, biometric scan, verbal password, or the like) entered by the customer 110, to permit the customer 110 to retrieve one or more packages 190 from the first storage compartment 124 of the receptacle 120.
The exemplary system 100 shown in
In the embodiment shown in
While the server 160 is illustrated in
In some embodiments, the receptacle 120 includes a transceiver 158 configured to transmit a verification input entered by the customer 110 (e.g., via an interface provided at the receptacle 120 or the mobile electronic device 115 of the customer 110) over the network 165 to the server 160, and the server 160 is configured to authenticate the customer 110 based on the verification input received by the server 160 from the transceiver 158 of the receptacle 120. In some aspects, the server 160 is configured to transmit an access signal to the control unit 150 of the receptacle 120 indicating that the verification input entered by the customer 110 was accepted, and the control unit 150 of the receptacle 120, in response to receipt of the access signal from the server 160, is configured to unlock the movable cover 156 and to permit the customer 110 to retrieve the package 190 from the interior of the receptacle 120 through the customer access opening 154. In some aspects, the verification data (e.g., verification code) to be entered by the customer 110 is transmitted to the mobile electronic device 115 of the customer 110, either directly from the server 160, or from the server 160 via the transceiver 158. The verification data transmitted to the mobile electronic device 115 of the customer 110 may be used by the customer 110 to transmit the verification code to the control unit 150 of the receptacle 120 (e.g., by keying the verification code directly into an interface of the receptacle 120 or by transmitting the verification code from the mobile electronic device 115 of the customer 110) in order to open the movable cover 156 directly, or to open a box that contains a key (physical keys or blockchain-encoded devices) that can open the movable cover 156. The transmission of a verification code to a mobile electronic device 115 of the customer 110 further increases the security of the system 100, and reduces the chance that a person who is not authorized by the customer 110 retrieves the package 190 from the receptacle 120.
According to some embodiments, the transceiver 158 of the receptacle 120 is also configured to transmit, via the network 165, a signal over the network 165 to the server 160 including an electronic confirmation that the package 190 has been retrieved by the customer 110 from the first storage compartment 124 of the receptacle 120 via the customer access opening 154 after the movable cover 156 moves to the open position. In some approaches, in response to receipt of such an electronic confirmation from the receptacle 120, the server 160 is configured to transmit a signal to the electronic database 170 indicating that the order placed by the customer 110 has been completed, thereby updating the electronic database 170 such that the pending order associated with the customer is converted into a completed order.
As described above, in some embodiments, the package 190 is retained in the first storage compartment 124 of the receptacle 120 until a time when the package 190 is retrieved by the customer 110 from the first storage compartment 124 via the customer access opening 154. In certain situations, customers 110 are not able (or choose not to) pick up the packages 190 from the receptacle 120 on the day the packages 190 were first deposited, or at all. Accordingly, in some embodiments, the receptacle 120 is configured such that the package 190 remains in the first storage compartment 124 of the receptacle only for a predetermined period of time (e.g., 30 minutes, 1 hour, 2, hours, 3 hours, 4 hours, 6 hours, 12 hours, 24 hours, 48 hours, 72 hours, etc.), after which the package 190 is automatically transferred from the first storage compartment 124 to the second storage compartment 126 of the receptacle 120. As such, the interior of the first storage compartment 124 is freed to receive other packages 190 instead of holding a package 190 that a customer has not picked up after the predetermined package pick-up time period has expired.
In some aspects, when the presence of the package 190 in the first storage compartment 124 does not prevent a drop off of another package 190 (e.g., by an unmanned vehicle 180) at the receptacle 120, the package 190 is retained in the first storage compartment 124 of the receptacle 120 and is not automatically transferred to the second storage compartment 126 even after the predetermined period of time (e.g., 30 minutes, 1 hour, 2, hours, 3 hours, 4 hours, 6 hours, 12 hours, 24 hours, 48 hours, 72 hours, etc.) expires. In other words, in some aspects, the package 190 is automatically transferred from the first storage compartment 124 to the second storage compartment 126 of the receptacle 120 only when the first storage compartment 124 is required to be freed from the presently stored package 190 (that the customer 110 has not picked up within an allotted period of time) in order to receive other packages 190 that are being dropped off at the receptacle 120 by an unmanned vehicle 180 and that require the storage space of the first storage compartment 124. In one aspect, when a package 190 is retained in the first storage compartment 124 in excess of the predetermined period of time for pick-up of the package 190 by the customer 110, but does not prevent an unmanned vehicle 180 from dropping off another package 190 at the receptacle 120, the package 190 is retained in the first storage compartment 124 of the receptacle 120 and is not automatically transferred to the second storage compartment 126, but the receptacle 120 is marked by the system 100 as being available for drop-off of packages 190 by the unmanned vehicles 180 that are actively en route or about to be deployed.
In one aspect, when the control unit 150 of the receptacle 120 transmits a query (e.g., to the server 160 or electronic database 170) regarding orders being actively fulfilled by the system 100 and receives a signal (e.g., from the server 160 or an unmanned vehicle 180) indicating that no unmanned vehicle 180 is en route to drop off a package 190 at the receptacle 120, the control unit 150 does not cause the package 190 being retained in the first storage compartment 124 to be transferred to the second storage compartment 126 even if the predetermined period of time for pick-up of the package 190 by the customer 110 has expired. Conversely, when the control unit 150 of the receptacle 120 transmits a query (e.g., to the server 160 or electronic database 170) regarding orders being actively fulfilled by the system 100 and receives a signal (e.g., from the server 160 or an unmanned vehicle 180) indicating that there is an unmanned vehicle 180 actively en route to drop off a package 190 at the receptacle 120, the control unit 150 causes (as described in more detail below) the package 190 being retained in the first storage compartment (after the predetermined period of time for pick-up of the package 190 by the customer 110 has expired 124) to be transferred to the second storage compartment 126.
In some embodiments, the receptacle 120 includes a package detecting sensor 153 configured to detect a presence of the package 190 dropped off by the unmanned vehicle 180 in the interior of the first storage compartment, 124. The package detecting sensor 153 may be a motion-detecting sensor, a photo sensor, a radio frequency identification (RFID) sensor, an optical sensor, a barcode sensor, a digital camera sensor, a weight sensor, a spectrometric sensor, or the like. In one embodiment, the package detecting sensor 153 includes a digital camera sensor configured to snap a still photo or record a moving video of the package 190 during the movement of the package 190 within the interior of the first storage compartment 124, and to transmit a signal including the still photo and/or the moving video of the package 190 to the control unit 150, which enables the control unit 150 to determine whether the package 190 is present in the interior of the first storage compartment 124 of the receptacle. In some aspects, the receptacle includes a visual (e.g., light-based), audio (e.g., voice-based), and/or electronic (e.g., signal-based) indicator that indicates (e.g., to an unmanned vehicle 180 and/or a delivery service worker) that the first storage compartment 124 of the receptacle 120 is occupied and cannot accept any more packages 190.
In some embodiments, the control unit 150 is configured to obtain sensor data from the package proximity sensor 152, and in response to receiving a signal from the package proximity sensor 152 indicating that the package 190 is located near the access panel 128 (e.g., being lowered onto the access panel 128 by an unmanned vehicle 180), the control unit 150 is programmed to cause the access panel 128 to move from the closed position of
In some embodiments, as mentioned above, the control unit 150 is programmed, in response to receiving a signal from the package proximity sensor 152, to cause the access panel 128 to move from the closed position into the open position and permit the package 190 to be deposited into the first storage compartment 124 of the receptacle 120. For example, in some aspects, the access panel 128 is operatively coupled to an actuator (e.g., an electric motor, hook and spring-based device, or the like) that, when activated, causes the access panel 128 to pivot, slide, or otherwise move between the closed position and the open position transceiver in response to receiving a signal from the control unit 150.
In some embodiments, the control unit 150 is configured to obtain sensor data from the package detecting sensor 153, and in response to receiving a signal from the package detecting sensor 153 that indicates that the package 190 has been deposited into the first storage compartment 124, to start a timer, and to end the timer when the predefined interval of time is reached. The timer may depend on the specifics of the order placed by the customer 110, and could be, for example, 1 hour, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 12 hours, 24 hours, etc. While
As discussed above, in the illustrated embodiment, the first and second storage compartments 124 and 126 are separated from each other by the partition panel 149. In the illustrated embodiment, the partition panel 149 comprises a release panel 155 movable from a closed position that retains the package 190 in the first storage compartment 124 to an open position that releases the package 190 from the first storage compartment 124 into the second storage compartment 126 in the interior of the receptacle 120. As mentioned above, in some aspects, the control unit 150 is programmed to cause the release panel 155 to move from the closed position of
Unlike the first storage compartment 124 of the receptacle 120, which may be accessed only by the customer 110 who ordered the products contained in the package 190, the second storage compartment 126 of the receptacle 120 may be accessed only by the delivery service workers (or other authorized personnel) to retrieve the package 190 from the receptacle 120 when the package 190 has not been timely picked up by the customer 110, and to either deliver the package 190 to the customer 110 via other means (e.g., delivery truck, unmanned vehicle, etc.), or to return the package 190 to a facility of the retail provider, after which the order is cancelled.
In the embodiment illustrated in
Since the receptacles 120 are located outside and exposed to the elements (e.g., sun, rain, snow, etc.), in some embodiments, the receptacle 120 may be coupled to a cover (e.g., roof, umbrella, etc.) that would protect a consumer interacting with the receptacle 120 from the elements. During rain, it is conceivable that rain water may go into the interior of the first storage compartment 124 through the access opening 129 as a result of the movement of the access panel 128 from the closed position to the open position when permitting the package 190 to drop into the interior of the first storage compartment 124. To address this potential issue, in some embodiments, the receptacle 120 includes at least one drainage pipe positioned such that it traps the rain water that enters the interior of the receptacle 120 as a result of movement of the access panel 128 from the closed position to the open position, and guides the trapped rain water out of the interior of the receptacle 120 (e.g., via a terminal portion of the drainage pipe, or through a drainage opening in communication with the terminal portion of the drainage pipe). In one aspect, a portion of the drainage pipe may have heating elements coupled thereto in order to provide a heating effect to the fluid and/or particles flowing through the drainage pipe, thereby preventing the rain water flowing through the drainage pipe from freezing and/or melting any snow that may enter the interior of the receptacle 120 as a result of movement of the access panel 128 from the closed position to the open position, and ensure that the snow does not freeze in the drainage pipe.
After the product-containing package 190 is deposited into the first storage compartment 124 via movement of the access panel 128 from the closed position to the open position, the package 190 dropped into the first storage compartment 124 drops onto the partition panel 149 separating the first storage compartment 124 from the second storage compartment 126. In some aspects, the package 190 is then retained in the first storage compartment 124 until it is retrieved by a customer 110 (or a person authorized by the customer to pick up the package 190 from the receptacle 120) via a customer access opening 154 that is generally obstructed by a movable cover 156. To that end, the method 500 of
In some aspects, a customer 110 who ordered the products contained in the package 190 (or a person authorized by the customer 110) is permitted to attempt to retrieve the package 190 containing the customer-ordered products from the first storage compartment 124 by entering verification data (e.g., verification code, biometric scan, verbal password, or the like). If this verification data entered by the customer 110 (which, in some embodiments, is transmitted to the server 160 for authentication by cross-referencing the information stored in the electronic database 170) is authenticated, in some aspects, the movable cover 156 opens (e.g., in response to a control signal received from the control unit 150) and permits the customer 110 to retrieve the package 190 from the first storage compartment 124 though the customer access opening 154. To that end, the exemplary method 500 of
In the illustrated embodiment, the method 500 of
The method 500 further includes providing the second storage compartment 124 with a delivery service access opening 164 restricted by a movable cover 166 configured to open and permit a delivery service operator to retrieve the package 190 from the second storage compartment 126 through the delivery service access opening 164 (step 560). In particular, as mentioned above, the second storage compartment 126 includes a delivery service access opening 164 restricted by a cover 166 that is configured to move from a closed position where it restricts access to the interior of the second storage compartment 126 through the delivery service access opening 164 to an open position where it permits access to the interior of the second storage compartment 126 through the delivery service access opening 164. This movable cover 166 restricting access to the second storage compartment 126 via the delivery service access opening 164 is configured to be unlocked by the delivery service operator via electronic verification input (e.g., access code, biometric data, or the like), a physical key, or the like.
Since customers 110 do not always pick up the packages 190 from the receptacle 120 within a reasonable time (e.g., a specific pick-up time specified in the product order, or a pick-up time predefined by the server 160 and/or control unit 150), in some embodiments, the receptacle 120 is configured such that the package 190 remains in the first storage compartment 124 of the receptacle only for a predetermined period of time (e.g., 30 minutes, 1 hour, 2, hours, 3 hours, 4 hours, 6 hours, 12 hours, 24 hours, 48 hours, 72 hours, etc.), after which the package 190 is automatically transferred from the first storage compartment 124 to the second storage compartment 126 of the receptacle 120. In the illustrated embodiment, the receptacle 120 includes a control unit 150 operatively coupled to the release panel 155 such that, after the predetermined period of time during which the package 190 is permitted to remain in the first storage compartment 124 without being picked up elapses, the control unit 150 sends an activation signal to the release panel 155 to cause the release panel 155 to move from the closed position (
The systems and methods described herein advantageously provide for simple receptacles configured to receive packages ordered by customers of a retail provider, and to securely store the packages until picked up by the customers. If the customers do not pick up the products within a predefined product pick-up time, the receptacles automatically transfer the packages from the first storage compartment accessible by the customer to a second storage compartment, which is accessible by a delivery service workers, thereby enabling the delivery service workers to retrieve the packages from the receptacles and to either deliver the packages to the customers via other means, or to return the packages to a facility operated by or for the retail provider. As such, the systems and methods described herein provide for simple and cost-efficient package storage receptacles that may be advantageously used by a wide range of communities.
Those skilled in the art will recognize that a wide variety of other modifications, alterations, and combinations can also be made with respect to the above described embodiments without departing from the scope of the invention, and that such modifications, alterations, and combinations are to be viewed as being within the ambit of the inventive concept.
This application claims the benefit of U.S. Provisional Application No. 62/670,244, filed May 11, 2018, which is incorporated herein by reference in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| 62670244 | May 2018 | US |
