An exhaust system for a combustion engine vehicle includes an exhaust pipe extending between an exhaust inlet disposed opposite an exhaust outlet. The exhaust inlet and exhaust outlet are in fluidic communication with one another. The exhaust inlet is configured to receive an exhaust gas produced by an internal combustion engine of the combustion engine vehicle. A second pipe has an air inlet extending from and connected to the exhaust pipe. The second pipe is configured to be in fluidic communication with the exhaust outlet. The air inlet is configured to receive an outside flow of air. The exhaust gas from the combustion engine vehicle and the outside flow of air captured by the air inlet when the combustion engine vehicle is moving forward are configured to be combined and to cooperatively exit out the exhaust outlet.

A personal watercraft includes a floatation member, a thrust assembly, a steering assembly, and a braking assembly. The assemblies may be actuated either mechanically or electrically. The thrust assembly is human powered, solar powered, or electric powered. The thrust, steering, and braking assemblies can be added after-market to an existing stand-up paddle board (SUP), or built into one or a plurality of SUPs during initial manufacturing. When the thrust assembly is human powered, it is leg or arm powered. When the thrust assembly is leg powered, the legs can move backward and forward in a sliding motion, up and down in a stomping fashion, or move in a loop trajectory. When the thrust assembly is arm powered, the arms can move forward/backward together or separately. The thrust assembly includes one or a plurality of paddles or flippers that are positioned to the side or under the SUP.

A personal watercraft includes a floatation member, a thrust assembly, a steering assembly, and a braking assembly. The assemblies may be actuated either mechanically or electrically. The thrust assembly is human powered, solar powered, or electric powered. The thrust, steering, and braking assemblies can be added after-market to an existing stand-up paddle board (SUP), or built into one or a plurality of SUPs during initial manufacturing. When the thrust assembly is human powered, it is leg or arm powered. When the thrust assembly is leg powered, the legs can move backward and forward in a sliding motion, up and down in a stomping fashion, or move in a loop trajectory. When the thrust assembly is arm powered, the arms can move forward/backward together or separately. The thrust assembly includes one or a plurality of paddles or flippers that are positioned to the side or under the SUP.

A jewelry display includes a ferromagnetic planar substrate and a bracket configured to be attached to a wall. The bracket has at least one wall engagement surface disposed along an inner surface and at least one ferromagnetic planar substrate engagement surface disposed along an outer surface. An adhesive backed non-slip covering adhesively attaches to the substrate engagement surface. At least one bracket magnet is disposed on the inner surface of the bracket. A plurality of jewelry fixtures are configured to be removably attached to the front surface of the ferromagnetic planar substrate, each jewelry fixture having at least one permanent fixture magnet and a jewelry holding structure, where the at least one permanent fixture magnet of each jewelry fixture is magnetically attracted to the ferromagnetic planar substrate.

A jewelry display includes a ferromagnetic planar substrate and a bracket configured to be attached to a wall. The bracket has at least one wall engagement surface disposed along an inner surface and at least one ferromagnetic planar substrate engagement surface disposed along an outer surface. An adhesive backed non-slip covering adhesively attaches to the substrate engagement surface. At least one bracket magnet is disposed on the inner surface of the bracket. A plurality of jewelry fixtures are configured to be removably attached to the front surface of the ferromagnetic planar substrate, each jewelry fixture having at least one permanent fixture magnet and a jewelry holding structure, where the at least one permanent fixture magnet of each jewelry fixture is magnetically attracted to the ferromagnetic planar substrate.

A propulsion assembly utilizes at least one fluid propulsion chamber operationally attached or mounted to a vessel. Each fluid propulsion chamber generally comprises an outer housing and an inner sleeve; the outer housing is slidably disposed relative to the inner sleeve. Each inner sleeve further includes at least one water intake vent or aperture, and at least one outlet nozzle or jet. Pedal assemblies are moveably mounted within elongated slots or apertures extending through the vessel. A linkage assembly operationally connects the pedals to the at least one fluid propulsion chamber. Force imparted on said pedals (such as by the legs/feet of a user) is transferred to the fluid propulsion chambers by said linkage assembly to generate positive thrust to propel the vessel.

A propulsion assembly utilizes at least one fluid propulsion chamber operationally attached or mounted to a vessel. Each fluid propulsion chamber generally comprises an outer housing and an inner sleeve; the outer housing is slidably disposed relative to the inner sleeve. Each inner sleeve further includes at least one water intake vent or aperture, and at least one outlet nozzle or jet. Pedal assemblies are moveably mounted within elongated slots or apertures extending through the vessel. A linkage assembly operationally connects the pedals to the at least one fluid propulsion chamber. Force imparted on said pedals (such as by the legs/feet of a user) is transferred to the fluid propulsion chambers by said linkage assembly to generate positive thrust to propel the vessel.

A human powered watercraft or land vehicle is described herein. A watercraft or land vehicle may have two pedals that reciprocated are in a linear or slightly curved trajectory but not a circular motion. As the two pedals are reciprocated, an output shaft is rotated in either a clockwise or counterclockwise direction when the left pedal is pushed forward or when the right pedal is pushed forward. The output shaft may be connected to a propeller of a watercraft or a land vehicle so as to propel the watercraft or land vehicle forward. The output shaft may receive rotational input through two gears mounted to the output shaft with one-way bearings that enable the output shaft to rotate in the same direction regardless of whether the left pedal or the right pedal is being pushed forward.

A human powered watercraft or land vehicle is described herein. A watercraft or land vehicle may have two pedals that reciprocated are in a linear or slightly curved trajectory but not a circular motion. As the two pedals are reciprocated, an output shaft is rotated in either a clockwise or counterclockwise direction when the left pedal is pushed forward or when the right pedal is pushed forward. The output shaft may be connected to a propeller of a watercraft or a land vehicle so as to propel the watercraft or land vehicle forward. The output shaft may receive rotational input through two gears mounted to the output shaft with one-way bearings that enable the output shaft to rotate in the same direction regardless of whether the left pedal or the right pedal is being pushed forward.

Provided is a portable foldable aquaplane, comprising a buoyancy device (9), a handle (2), a pedal board (3) and a seat cushion (5), wherein the buoyancy device (9) comprises a head buoyancy component (1) and a body buoyancy component (13); the head buoyancy component (1) is connected to a front end of the body buoyancy component (13) in a foldable manner; the handle (2) is connected to the head buoyancy component (1) via a first telescopic rod (14); and the seat cushion (5) is connected to the body buoyancy component (13) via a second telescopic rod (15). By adjusting the height of the handle (2) and of the seat cushion (5), the aquaplane is not only capable of satisfying the requirements of riding on water in a standing state, but is also capable of satisfying the requirements of riding on water in a sitting state. The foldable structure of the aquaplane makes it easy to carry and store, and same can also provide sports and entertainment for both individuals and multi-players at the same time by means of a connection hook.