# US 12,110,073 B2 · City wagon > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,110,073 B2 - Document ID: US12110073B2 - Status: Granted - Kind: B2 - Application number: 17/568,044 - Filed: 2022-01-04 - Published: 2022-10-27 - Granted: 2024-10-08 - Earliest claimed: 2021-01-07 - Applicants: Frederick W. Sinclair, III - Inventors: Frederick W. Sinclair, III - Web page: https://patentgrep.com/patent/US12110073B2 ## CPC - B62D 63/061: {Foldable, extensible or yielding trailers (foldable caravans B60P3/34; adjustable chassis frames B62D21/14)} - B62D 63/062: {Trailers with one axle or two wheels (semi-trailers B62D53/06)} - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) ## Abstract A portable utility wagon trailer is provided having a support frame connected to a single axle operatively connected to two opposing wheels. The support frame includes at least four low friction blocks mounted thereon. The portable utility wagon trailer includes a deck having a pair of opposing side rails disposed beneath the deck. Two of the low friction blocks operatively engages one side rail in a slidable arrangement, and the other two of the low friction blocks operatively engage the opposing side rail in a slidable arrangement. A spring biased locking pin removably engages an aperture defined by at least one side rail, for locking the deck in a fixed position for transport. The deck is configured to be collapsed by a user and then stood upright for storage. ## Claims ### Claim 1 A collapsible utility trailer comprising: a support frame connected to an axle; at least one opposing pair of wheels operatively connected to the axle for supporting the collapsible utility trailer in an extended transport position; a deck having a first side rail opposite a second side rail, wherein the first side rail and the second side rail are disposed beneath the deck, the deck disposed above the support frame; at least four low friction blocks mounted atop the support frame, wherein at least two of the at least four low friction blocks operatively engages the first side rail in a slidable arrangement, wherein at least two of the at least four low friction blocks operatively engages the second side rail in a slidable arrangement; at least one spring biased locking pin mounted to the support frame, said locking pin configured to operatively engage at least one locking aperture defined by the first side rail, at the option of the user, wherein upon engagement of said spring biased locking pin into said at least one locking aperture, the deck is fixed in the extended transport position adapted for transportation, wherein upon removal of said engagement of said spring biased locking pin from said at least one locking aperture, the deck is slidable against the low friction blocks into a collapsed storage position. ### Claim 2 (depends on 1) The collapsible utility trailer of claim 1, wherein the deck comprises a front deck end opposite a back deck end, wherein the back deck end terminates at a back deck end plane that is perpendicular to a longitudinal axis of the deck, wherein the support frame comprises a front frame end opposite a back frame end, wherein the back frame end terminates at a back frame end plane that is perpendicular to a longitudinal axis of the support frame, wherein in the collapsed storage position the back deck end plane is in coplanar alignment with the back frame end plane. ### Claim 3 (depends on 1) The collapsible utility trailer of claim 1, wherein the first side rail defines at least a second locking aperture, wherein the spring biased locking pin is adapted to engage said at least second locking aperture in the collapsed storage position. ### Claim 4 (depends on 1) The collapsible utility trailer of claim 1, further comprising at least a second opposing pair of wheels operatively connected to a second axle connected to the support frame.