| CPC F03B 17/061 (2013.01) [F03B 3/145 (2013.01)] | 17 Claims |

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1. An actuating device comprises:
a housing comprising:
an inlet to receive a flow of fluid into the housing;
an outlet to discharge the flow of the fluid from the housing;
a fluid flow director and a rotating element, wherein:
the rotating element comprises a rotating body and a shaft wherein, the rotating body defines an air/hydrofoil shape;
the fluid flow director is disposed towards the inlet for creating a vortex flow and directing the fluid towards the rotating body, wherein the fluid flow director comprises two or more non-rotational blades with respect to a longitudinal central axis of the housing; and
the rotating element is disposed within the housing, operable to rotate as a result of the fluid directed from the fluid flow director towards the rotating body, wherein rotation of the rotating body causes pressure fluctuation within the housing; and
a first aperture exposed to the rotating body of the rotating element, wherein the pressure fluctuation caused by the rotation of the rotating body is transmitted to the first aperture.
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