Abstract: An apparatus for generating power from a fluid stream flowing along a stream bed, includes a base. The base includes a lower face for resting on the stream bed. A foil arm is pivotally connected to the base. A foil is pivotally connected to the foil arm remote from the base. The base further includes an upper face for directing fluid flow towards the foil to augment fluid flow over the foil.

Abstract: An apparatus for generating power from a fluid stream comprising a foil arm connected to a support by a pivot; a bidirectional foil comprising first and second edges connected to the foil arm remote from the pivot; and, an actuator connected between bidirectional foil and foil arm, the actuator being adapted to adjust the angle between foil and foil arm.

Abstract: An apparatus for oscillating and orienting a vane (2) relative to a fluid, comprising a main lever (32) pivotally connected at one end about a reference axis (4); a vane pivotally connected to the main lever about a vane axis (6) remote from the reference axis, the vane axis being substantially parallel to the reference axis; a main drive means for oscillating the main lever about the reference axis so displacing the vane from side to side; an angle change assembly (7) for pivoting the vane about the vane-axis comprising (i) an angle drive means adapted to oscillate with a phase lag of approximately 90 degrees to the main drive means; (ii) control means connected between the angle drive means and vane adapted to convert the oscillation of the angle drive means to oscillation of the vane about the vane axis; and, (iii) an offset means adapted to add an offset to the centre of angular oscillation of the vane about the vane axis.

Abstract: An apparatus for oscillating a vane comprising a main lever pivoted at one end about a reference axis, and pivotally coupled at the other end to the vane about a vane axis remote from the reference axis; an angle change assembly connected to the vane such that rotation of the angle change assembly rotates the vane; and, a drive assembly, the drive assembly comprising a crank arm adapted to be pivoted about a fixed crank axis; a lever drive arm pivotally connected to the main lever at a point remote from the reference axis and pivotally connected to the main crank remote from the crank axis; a coupling member having first and second coupling arms connected together at a base, the base being adapted to pivot about a coupling axis; an angle drive arm connected at a first end to the angle change assembly for rotation thereof and pivotally connected to the first coupling arm remote from the coupling axis; the second coupling arm being pivotally connected to the lever drive arm remote from the coupling axis, the

Abstract: An apparatus for oscillating a vane comprising a main lever pivoted at one end about a reference axis, and pivotally coupled at the other end to the vane about a vane axis remote from the reference axis; an angle change assembly connected to the vane such that rotation of the angle change assembly rotates the vane; and, a drive assembly, the drive assembly comprising a crank arm adapted to be pivoted about a fixed crank axis; a lever drive arm pivotally connected to the main lever at a point remote from the reference axis and pivotally connected to the main crank remote from the crank axis; a coupling member having first and second coupling arms connected together at a base, the base being adapted to pivot about a coupling axis; an angle drive arm connected at a first end to the angle change assembly for rotation thereof and pivotally connected to the first coupling arm remote from the coupling axis; the second coupling arm being pivotally connected to the lever drive arm remote from the coupling axis, the pi