A trailer system for transporting multiple adult passengers and/or supplies over harsh terrain (e.g., snow, ice, wetland, etc.) when towed behind a vehicle. The trailer system includes a cabin, first and second skis, and first and second suspension assemblies. The suspension assemblies connect the skis, respectively, with the cabin. The suspension assemblies incorporate multiple pivot points that effectively isolate the skis from cabin, and promote true “tracking” of the trailer system relative to the towing vehicle. In some embodiments, the cabin has a highly buoyant construction, allowing the trailer system to float in water.

A utility sled is formed from a lightweight material and includes a handle flexibly attached to the front end thereof. The handle includes a hook that is seated within a small opening of the utility sled when not in use. A pair of retractable wheels is attached to an exterior of each sidewall of the utility sled. The sidewalls are biased outward when no load is present. When loaded, the sidewalls advantageously tend to straighten vertically. The formed bottom of the sled includes a plurality of ribs which both add strength to the sled as well as function as sled runners when the wheels are retracted. The ribs operate to reduce friction between the sled bottom and the underlying surface.

A boat ramp designed to collapse so the amphibious vehicle may be towed at highway speeds. The ramp fabricated of a central isosceles triangle hinged to the vehicle at its base flanks a pair of right triangles hinged along their hypotenuses such that the ramp can be folded over the vehicle during travel. The hinged portion is reinforced with removable steel channel during use.

A trailer pontoon bottom has built in wheels designed to fold under the trailer pontoon to be clear of the water and to extend out and lock for land use and be clear of the pontoons. A pair of swing arms each having a first end attached to an inside axial hub of the wheel are designed to rotate on a boss of the first end. A second end of the swing arm is configured to rotate a maximum of 90 degrees from its folded position into a trailer position. An axis parallel to a back end of the trailer pontoon is configured to attach to each of the pair of swing arms at a respective pivot located a swing arm distance from an edge of the trailer pontoon. The axis is rotatable by less than 90 degrees to enable each wheel to retract against a suspension bumper.

A trailer pontoon bottom has built in wheels designed to fold under the trailer pontoon to be clear of the water and to extend out and lock for land use and be clear of the pontoons. A pair of swing arms each having a first end attached to an inside axial hub of the wheel are designed to rotate on a boss of the first end. A second end of the swing arm is configured to rotate a maximum of 90 degrees from its folded position into a trailer position. An axis parallel to a back end of the trailer pontoon is configured to attach to each of the pair of swing arms at a respective pivot located a swing arm distance from an edge of the trailer pontoon. The axis is rotatable by less than 90 degrees to enable each wheel to retract against a suspension bumper.

An amphibious transport apparatus includes forward and aft ends, a pair of spaced apart pontoons including tracks, and a transversely extending structure, which can include a platform, that spans between the pontoons and connects the pontoons together. The amphibious transport apparatus further includes a sled vessel that can be used to transport materials or personnel. The sled can be releasably attached to the amphibious transport apparatus with tow bar and a pivotal connection. Said tow bar can be rotatable between an upper storage position wherein the tow bar engages the vessel away from said pivotal connection and above a terrain surface, and a lower towing position. A towing position of said amphibious craft and sled can be defined by the sled connected to the amphibious craft at the releasable pivotal connection, with the amphibious craft being self propelled with said tracks for engaging the underlying terrain and with the sled in the lower towing position so that the sled bottom drags along on the underlying terrain during movement of the amphibious transport apparatus and sled. A trailer for loading and unloading the sled can also be provided. The amphibious craft can push the sled onto the trailer during loading.

A utility sled is formed from a lightweight material and includes a handle flexibly attached to the front end thereof. The handle includes a hook that is seated within a small opening of the utility sled when not in use. A pair of retractable wheels is attached to an exterior of each sidewall of the utility sled. The sidewalls are biased outward when no load is present. When loaded, the sidewalls advantageously tend to straighten vertically. The formed bottom of the sled includes a plurality of ribs which both add strength to the sled as well as function as sled runners when the wheels are retracted. The ribs operate to reduce friction between the sled bottom and the underlying surface.

An amphibious transport apparatus includes forward and aft ends, a pair of spaced apart pontoons including tracks, and a transversely extending structure, which can include a platform, that spans between the pontoons and connects the pontoons together. The amphibious transport apparatus further includes a sled vessel that can be used to transport materials or personnel. The sled can be releasably attached to the amphibious transport apparatus with tow bar and a pivotal connection. Said tow bar can be rotatable between an upper storage position wherein the tow bar engages the vessel away from said pivotal connection and above a terrain surface, and a lower towing position. A towing position of said amphibious craft and sled can be defined by the sled connected to the amphibious craft at the releasable pivotal connection, with the amphibious craft being self propelled with said tracks for engaging the underlying terrain and with the sled in the lower towing position so that the sled bottom drags along on the underlying terrain during movement of the amphibious transport apparatus and sled. A trailer for loading and unloading the sled can also be provided. The amphibious craft can push the sled onto the trailer during loading.

A trailer system for transporting multiple adult passengers and/or supplies over harsh terrain (e.g., snow, ice, wetland, etc.) when towed behind a vehicle. The trailer system includes a cabin, first and second skis, and first and second suspension assemblies. The suspension assemblies connect the skis, respectively, with the cabin. The suspension assemblies incorporate multiple pivot points that effectively isolate the skis from cabin, and promote true tracking of the trailer system relative to the towing vehicle. In some embodiments, the cabin has a highly buoyant construction, allowing the trailer system to float in water.

An amphibious water tanker of 100-ton water capacity with two propelling and pumping modules hooked up at each side with pneumatic air-turbine engines powered by Archimedes-Screw pumps capable of pumping 100,000 GPM flood water into a floatation-controlled water tanker and out from the water tanker to a water consumer including agriculture. Four Caterpillar belts-driven units, each with eight toothed wheels driven by pneumatic air turbine engines using auxillary air tanks compressed air to propel the amphibious water tanker in all directions, with the tanker rolling on 140 load supporting sphere tires. Four air-turbine engines with marine propellors propel the self-inflated floatable amphibious water tanker in the shallow or deep water of a flooded river or lake. The water tanker is built locally with helical hardwood bars bolted together and each adjacent helical turn bolted to create a cylindrical 4.5-meter diameter 10-meter long, each with inlet and outlet-controlled valves.