# US 10,479,388 B2 · Shopping cart and associated systems and methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,479,388 B2 - Document ID: US10479388B2 - Status: Granted - Kind: B2 - Application number: 15/426,569 - Filed: 2017-02-07 - Published: 2017-08-10 - Granted: 2019-11-19 - Earliest claimed: 2016-02-08 - Assignees: Walmart Apollo, LLC - Applicants: Walmart Apollo, LLC - Inventors: Larry A. Kraus; Anthony G. Wind, III; Lawrence J. Duerkes - Web page: https://patentgrep.com/patent/US10479388B2 ## CPC - B62B 5/0423: {braking or blocking when leaving a particular area} - B60R 16/0307: {using generators driven by a machine different from the vehicle motor} - B62B 3/14: characterised by provisions for nesting or stacking, e.g. shopping trolleys {(collapsible shopping trolleys B62B3/027)} - B62B 5/0457: {by locking in a braking position} - B62B 5/06: Hand moving equipment, e.g. handle bars (for cycles B62K11/14, B62K21/12) - H04W 4/021: Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences - B60R 25/1012: {Zone surveillance means, e.g. parking lots, truck depots} - B60Y 2200/86: Carts; Golf carts - B60Y 2300/60: Control of electric machines, e.g. problems related to electric motors or generators - B60Y 2400/112: Batteries - B60Y 2400/308: Electric sensors - H04W 84/12: WLAN [Wireless Local Area Networks] - B62B: HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES (characterised by animal propulsion B62C; propulsion of sledges by driver or engine B62M) - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY ## Abstract Exemplary embodiments are generally directed to shopping carts and associated systems and methods. Exemplary embodiments of the shopping cart include a shopping cart body and a plurality of wheels supporting the shopping cart body. Exemplary embodiments of the shopping cart include a receiver configured to detect a position of the shopping cart relative to a range of a network or an area defined by a geo-fence. Exemplary embodiments of the shopping cart include an electromagnetic generator operatively coupled to at least one of the plurality of wheels. A resistive load can be selectively connected between an input and an output of the electromagnetic generator to restrict rotation of the at least one of the plurality of wheels as the position of the shopping cart detected by the receiver varies between within or outside of the range of the network or the area defined by the geo-fence. ## Claims ### Claim 1 A shopping cart, comprising: a shopping cart body; a plurality of wheels supporting the shopping cart body; a Wi-Fi receiver configured to detect a position of the shopping cart relative to a range of a network; and an electromagnetic generator operatively coupled to at least one of the plurality of wheels, wherein a resistive load is selectively connected between an input and an output of the electromagnetic generator to restrict rotation of the at least one of the plurality of wheels as the position of the shopping cart detected by the Wi-Fi receiver varies between within the range of the network and outside of the range of the network. ### Claim 2 (depends on 1) The shopping cart of claim 1, wherein the resistive load is selectively connected between the input and the output of the electromagnetic generator by a normally closed switch to form a closed circuit. ### Claim 3 (depends on 2) The shopping cart of claim 2, wherein the at least one of the plurality of wheels freely rotates in response to opening the normally closed switch. ### Claim 4 (depends on 3) The shopping cart of claim 3, comprising a global positioning system receiver. ### Claim 5 (depends on 4) The shopping cart of claim 4, wherein the global positioning system receiver is configured to detect the position of the shopping cart relative to an area defined by a geo-fence. ### Claim 6 (depends on 5) The shopping cart of claim 5, wherein the switch is open when the Wi-Fi receiver detects the position of the shopping cart as within the range of the Wi-Fi network or when the global positioning system receiver detects the position of the shopping cart as within the area defined by the geo-fence. ### Claim 7 (depends on 5) The shopping cart of claim 5, wherein the switch is closed when the Wi-Fi receiver detects the position of the shopping cart as outside of the range of the Wi-Fi network or when the global positioning system receiver detects the position of the shopping cart as outside of the area defined by the geo-fence to restrict rotation of the at least one of the plurality of wheels. ### Claim 8 (depends on 3) The shopping cart of claim 3, comprising a sensor configured to detect a proximity of a customer relative to the shopping cart. ### Claim 9 (depends on 8) The shopping cart of claim 8, wherein the sensor comprises at least one of a mechanical switch, a capacitive switch, or an optical sensor. ### Claim 10 (depends on 9) The shopping cart of claim 9, wherein the mechanical switch detects pressure imparted against a handle of the shopping cart body. ### Claim 11 (depends on 8) The shopping cart of claim 8, wherein the switch is open when the proximity of the customer is detected to be within a predetermined distance relative to the shopping cart by the sensor, allowing the at least one of the plurality of wheels to rotate freely. ### Claim 12 (depends on 8) The shopping cart of claim 8, wherein the switch is closed when the proximity of the customer is detected to be outside of a predetermined distance relative to the shopping cart by the sensor, restricting rotation of the at least one of the plurality of wheels. ### Claim 13 (depends on 1) The shopping cart of claim 1, further comprising: a power source; and a controller operatively coupled to the power source; wherein the controller is configured to selectively connect the resistive load between the input and the output of the electromagnetic generator; and wherein upon depletion of the power source beyond a threshold level, the controller ceases to operate and the resistive load remains connected between the input and the output of the electromagnetic generator to restrict rotation of the at least one of the plurality of wheels. ### Claim 14 A method of securing a shopping cart, comprising: providing a shopping cart, the shopping cart including (i) a shopping cart body, (ii) a plurality of wheels supporting the shopping cart body, (iii) a Wi-Fi receiver, and (iv) an electromagnetic generator operatively coupled to at least one of the plurality of wheels; detecting a position of the shopping cart relative to a range of a network; and controlling a switch to selectively connect and disconnect a resistive load between an input and an output of the electromagnetic generator as the position of the shopping cart detected by the Wi-Fi receiver varies between within the range of the network, and outside of the range of the network; wherein rotation of the at least one of the plurality of wheels is restricted in response to controlling the switch to connect the resistive load between the input and the output of the electromagnetic generator when the position of the shopping cart is detected by the Wi-Fi receiver to be outside of the range of the network; and wherein the at least one of the plurality of wheels is configured to freely rotate in response to controlling the switch to disconnect the resistive load from one of the input or the output of the electromagnetic generator when the position of the shopping cart is detected by the Wi-Fi receiver to be within the range of the network. ### Claim 15 (depends on 14) The method of claim 14, wherein the shopping cart comprises a global positioning system receiver, and wherein the method comprises detecting the position of the shopping cart relative to an area defined by a geo-fence with the global positioning system receiver. ### Claim 16 (depends on 15) The method of claim 15, wherein the switch is controlled to disconnect the resistive load from the input or the output of the electromagnetic generator when the Wi-Fi receiver detects the position of the shopping cart to be within the range of the Wi-Fi network or when the global positioning system receiver detects the position of the shopping cart to be within the area defined by the geo-fence. ### Claim 17 (depends on 15) The method of claim 15, wherein the switch is controlled to connect the resistive load between the input and output of the electromagnetic generator when the Wi-Fi receiver detects the position of the shopping cart to be outside of the range of the Wi-Fi network or when the global positioning system receiver detects the position of the shopping cart to be outside of the area defined by the geo-fence. ### Claim 18 (depends on 14) The method of claim 14, comprising detecting a proximity of a user relative to the shopping cart with a sensor. ### Claim 19 (depends on 18) The method of claim 18, wherein the switch is controlled to disconnect the resistive load from the input or the output of the electromagnetic generator when the sensor detects the proximity of the customer within a predetermined distance relative to the shopping cart. ### Claim 20 A shopping cart security system, comprising: a signal source; a shopping cart including (i) a shopping cart body, (ii) a plurality of wheels supporting the shopping cart body, (iii) an electromagnetic generator operatively coupled to at least one of the wheels, (iv) and a Wi-Fi receiver configured to receive signals from the signal source; and a resistive load selectively connected between an input and an output of the electromagnetic generator to restrict rotation of the at least one of the plurality of wheel and selectively disconnected from the input or the output of the electromagnetic generator to allow the at least one of the plurality of wheels to rotate freely; wherein the resistive load is disconnected from the input or the output of the electromagnetic generator when the Wi-Fi receiver detects the signal source, indicating that a position of the shopping cart is within a range of a network; and wherein the resistive load is connected between the input and output of the electromagnetic generator when the Wi-Fi receiver fails to detect the signal source, indicating that the position of the shopping cart is outside of the range of the network.