Patent ID: 7614861

Claim:
A static-fluid-pressure-driven rotary motor for converting fluid pressure at art inlet into a mechanical rotary output the motor comprising: (a) a casing defining a chamber having a fluid inlet and a fluid outlet; and (b) at least one rotor assembly rotatably mounted within said casing, said rotor assembly including: (i) a rotor mounted so as to be rotatable about an axis of rotation; (ii) a plurality of barrier elements associated with, and extending outwards from, said rotor, each of said barrier elements having an outer edge configured for passing in proximity to a facing wall of said casing chamber; and (iii) a resilient seal associated with at least said outer edge of each of said barrier elements, said resilient seal being configured to form a sliding seal between said outer edge and said facing wall while accommodating variations in clearance between said outer edge and said facing wall, wherein each of said barrier elements has upper and lower edges, and wherein said rotor assembly further includes upper and lower seal elements associated with said upper and lower edges and forming a sliding seal between said barrier elements and upper and lower surfaces, respectively, of said chamber.