Abstract: A turbine pinwheel has blades mounted with the outer edges curved to respond to the wind transverse to the axis like a vertical axis turbine while the blades inner edges are twisted to respond to the wind parallel to the axis like a horizontal axis turbine. With two rotor subassemblies mounted on the same shaft the pinwheel spins the same direction regardless of the direction of the wind in relation to the pinwheel axis. Each rotor subassembly may be made from a single sheet of material cut to a specific shape and formed to create the pinwheel blades and blade supports.

Abstract: An exhaust vent pipe terminal end fitting 15, with no moving parts, that utilizes the wind to extract exhaust gases from a vent pipe 10 and to mitigate the reverse flows of exhaust gases within the vent pipe 10 when the wind is at a downward angle to the vent pipe 10 termination. Low pressure areas adjacent to the vent opening are created by providing a truncated cone surface 12 mounted directly below the terminal end of the vent pipe 10 thereby drawing out exhaust gases from the vent pipe 10 while the is wind blowing from any direction.

Abstract: A turbine pinwheel has blades mounted with the outer edges curved to respond to the wind transverse to the axis like a vertical axis turbine while the blades inner edges are twisted to respond to the wind parallel to the axis like a horizontal axis turbine. With two rotor subassemblies mounted on the same shaft the pinwheel spins the same direction regardless of the direction of the wind in relation to the pinwheel axis. Each rotor subassembly may be made from a single sheet of material cut to a specific shape and formed to create the pinwheel blades and blade supports.

Abstract: A turbine rotor assembly having a rotor core formed by three reflex camber surfaces disposed symmetrically about an axis, each reflex camber surface being identical and having an aerodynamic shape producing positive torque through a large portion of its upwind travel while rotating about the axis. The trailing edge of each reflex camber surface joined to the leading edge of the adjacent reflex camber surface creating an envelope shielding the rotor core from the fluid driving the rotor.