# US 11,299,352 B2 · Automatic cart transport system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,299,352 B2 - Document ID: US11299352B2 - Status: Granted - Kind: B2 - Application number: 17/149,131 - Filed: 2021-01-14 - Published: 2021-05-20 - Granted: 2022-04-12 - Earliest claimed: 2018-09-12 - Assignees: Korea Wheel Corporation - Applicants: Korea Wheel Corporation - Inventors: Hun Choe - Web page: https://patentgrep.com/patent/US11299352B2 ## CPC - B65G 19/02: for articles, e.g. for containers - B65G 35/06: comprising a load-carrier moving along a path, e.g. a closed path, and adapted to be engaged by any one of a series of traction elements spaced along the path (effecting drive at two or more points spaced along the length of an endless conveyor B65G23/32) - B65G 17/005: {comprising individual load carriers which are movably mounted (B65G17/16 takes precedence)} - B65G 17/34: having flat surfaces, e.g. platforms, grids, forks - A01G 9/143: {Equipment for handling produce in greenhouses} - Y02A 40/25: Greenhouse technology, e.g. cooling systems therefor - B65G: TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS (packaging B65B; handling thin or filamentary materials, e.g. paper sheets or thread, B65H; cranes B66C; portable mobile or lifting or hauling appliances, e.g. hoists, B66D; devices for lifting or lowering goods for loading or unloading purposes, e.g. fork-lift trucks, B66F9/00; emptying bottles, jars, casks, barrels or similar containers, not otherwise provided for, B67C9/00; delivering or transferring liquids B67D; filling or discharging vessels for liquefied, solidified or compressed gases F17C; pipe-line systems for fluids F17D) - A01G: HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING (picking of fruits, vegetables, hops or the like A01D46/00; propagating unicellular algae C12N1/12) - Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE ## Abstract An automatic cart transport system. A track located in a factory working floor provides a trackway for an endless flexible conveyor chain. A plurality of chain units including a first chain portion having vertical rollers and a second chain portion having horizontal rollers are flexibly coupled, and the chain is advanced along the trackway by a drive motor. The chain units support thereabove, but within the track, a coupling plate having therein an aperture for accepting and capturing a chain connection shaft which is detachably connected to a cart. The cart is automatically towed along a defined pathway on the working floor of a factory by the chain, when connected to the coupling plate on the endless flexible conveyor chain. ## Claims ### Claim 1 An automatic conveyor system, the automatic conveyor system for use in a factory having a working floor, the working floor having a defined by size and shape within the factory, the automatic conveyor system comprising: a track, the track comprising a tubular member embedded in a substrate, the track having inner sidewalls and an upper slot, the track laid out along a plurality of straight sections connected by curved sections, the track laid out at least in part in a serpentine pattern in said substrate below the working floor; a chain, the chain comprising a plurality of first chain portions having a pair of vertical wheels and a plurality of second chain portions having at least one horizontal wheel, wherein first chain portions and second chain portions are sequentially adjustably connected forming an endless flexible chain for movement within the track, the first chain portions each further comprising neck portions sized and shaped for upward extension through the upper slot of the track, and connection flanges extending transversely outward from the neck portions; a coupling plate, the coupling plate mounted to connection flanges on a pair of adjacent first chain portions, the coupling plate each further comprising a connection shaft receiving aperture defined by interior sidewalls; and a chain drive mechanism configured for moving the chain. ### Claim 2 (depends on 1) The automatic conveyor system as set forth in claim 1, wherein the track comprises a rectilinear tubular member, wherein, the inner sidewalls provide opposing vertical walls. ### Claim 3 (depends on 2) The automatic conveyor system as set forth in claim 2, wherein the rectilinear tubular member comprises first and second upper flange portions, and wherein the upper slot in the square tubular member is provided between end edges of the first and second upper flange portions. ### Claim 4 (depends on 3) The automatic conveyor system as set forth in claim 3, further comprising upper reinforcing plates, the upper reinforcing plates located above the first and second upper flange portions, and substantially flush with the working floor, and located to protect the first and second upper flange portions against wear due to passage of the neck portions longitudinally through the upper slot. ### Claim 5 (depends on 1, 2, 3, 4) The automatic conveyor system as set forth in any one of claims 1 through 4, further comprising a cart; the cart having a load bearing surface, the load bearing surface supported by a plurality of wheels configured to support the cart for rolling movement on the working floor in a linear and in a curvilinear direction, the cart further comprising a coupling pipe, the coupling pipe sized and shaped to secure therein a chain connection shaft. ### Claim 6 (depends on 5) The automatic conveyor system as set forth in claim 5, wherein the cart further comprises a handle. ### Claim 7 (depends on 5) The automatic conveyor system as set forth in claim 5, wherein the chain connection shaft is sized and shaped for detachably securing the cart to the coupling plate, via secure coupling engagement with the chain connection shaft receiving aperture in the coupling plate. ### Claim 8 (depends on 7) The automatic conveyor system as set forth in claim 7, wherein the chain connection shaft further comprises a handle.