Abstract: A shock absorbing system for use with protective head gear includes a compressible member containing separate chambers that are inflated with a volume of a fluid (gas), and positioned between the skull and shell of the head gear. In one embodiment, the compressible member has at least one orifice that may vent fluid upon impact. The venting of fluid is directed outside of the shell through an expansion reservoir that may assume a bellows structure. This structure acts as a restrictive and temporary compartment for fluids. The expansion reservoir may assume a structure that permits temporary fluid transfer for the duration of impact. The structure will resist the introduction of fluid and actively return fluid to the “donating” chamber. The sealed and autonomous interior of the outermost chamber consists of smaller autonomous chambers that are inflated to higher pressures.

Abstract: A vehicle, including watercraft and personal watercraft, includes a hull, an engine system and a propulsion system. The engine system comprises an internal combustion engine and an air intake for receiving air to be mixed with fuel supplied to the engine. The propulsion system connects to the engine and propels the watercraft along a surface of a body of water using power from the engine. The watercraft can include a quick connect air/water separator, or air box. A fuel system is provided that has a fuel supply line and a fuel return line which are connected with a bypass line. For evacuating fuel from the supply line and the return line, the bypass line contains a valve which can be actuated to allow fuel to flow into the fuel reservoir. A lubrication system is provided that includes a filler neck comprising an oil/air separator which allows a mixture of oil and air to be separated and the oil to be returned to the oil reservoir.