# US 10,865,764 B2 · Flow hydro turbine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,865,764 B2 - Document ID: US10865764B2 - Status: Granted - Kind: B2 - Application number: 16/956,849 - Filed: 2019-01-18 - Published: 2020-10-15 - Granted: 2020-12-15 - Earliest claimed: 2018-01-22 - Assignees: Goran Kepnik S.P. - Applicants: Goran Kepnik S.P. - Inventors: Goran Kepnik - Web page: https://patentgrep.com/patent/US10865764B2 ## CPC - F03B 17/062: {with rotation axis substantially at right angle to flow direction} - F03B 3/00: Machines or engines of reaction type; Parts or details peculiar thereto - H02K 7/1823: {structurally associated with turbines or similar engines} - F05B 2240/13: to collect or cause flow towards or away from turbines - F05B 2240/24: for turbines - F05B 2240/30: Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor - F05B 2250/16: parabolic - F05B 2250/184: sinusoidal - F05B 2250/72: symmetric - Y02E 10/20: Hydro energy - F03B: MACHINES OR ENGINES FOR LIQUIDS (positive-displacement engines for liquid F03C; machines for liquids and gases F01; positive-displacement machines for liquids F04, rotary fluid gearing of the hydrokinetic type F16H41/00) - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - F05B: INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract The hydro turbine of the invention consists of a housing, which represents a stator part of hydro turbine, or a stator (S), and a rotor (R) that is assembled on the stator (S) through its axis so as to enable its rotation. The rotor (R) is designed as an axially symmetric body with flat lateral surfaces with a circular cross-section. The circular cross-section from both outer ends, that is from both flat lateral surfaces with a circular cross-section, decreases equally and continuously towards the middle, so that the rotor (R) has a narrowest cross-section in the middle. The decrease of the circular cross-section from both outer ends of the rotor (R) towards the central part of the rotor (R) is carried out such that the shape of the rotor (R) body in the longitudinal cross-section, that is, along the axis of the rotor (R), follows the shape of a parabolic curve or a sinusoidal curve. The rotor (R) has over its entire surface, in the longitudinal direction, that is along its axis, curved grooves (U). This kind of design of the hydro turbine enables that the water flows through the grooves (U) towards the middle part of the rotor (R), where it flows out and transfers all the momentum to the rotor (R), so that the hydro turbine can generate the torque (MR) even with small and variable flows. ## Claims ### Claim 1 A flow hydro turbine comprising of a rotor (R) and a stator (S), wherein the rotor (R) is rotatably mounted in the stator (S) via an axis, characterized in that, the rotor (R) is constructed as an axially symmetric body with flat lateral surfaces with a circular cross-section, wherein the circular cross-section from both outer ends, that is from both flat lateral surfaces with a circular cross-section, decreases equally and continuously towards the middle, so that the rotor (R) has a narrowest cross-section in the middle, and the rotor (R) has over its entire surface, in the longitudinal direction, that is along its axis, curved grooves (U). ### Claim 2 (depends on 1) The flow hydro turbine according to claim 1, characterized in that, the decrease of the circular cross-section from both outer ends of the rotor (R) towards the central part of the rotor (R) is carried out such that the shape of the rotor (R) body in the longitudinal cross-section, that is, along the axis of the rotor (R), follows the shape of a parabolic curve or a sinusoidal curve. ### Claim 3 (depends on 1) The flow hydro turbine according to claim 1, characterized in that, the grooves (U) are equally spaced one from another and are curved, and are carved into the surface of the rotor (R) in a form of a curve. ### Claim 4 (depends on 1) The flow hydro turbine according to claim 1, characterized in that, the grooves (U) are constructed in such a way, that the cross-section of the groove (U), in the portion located on an outer rim of the rotor (R), is wider, and gradually narrows into the interior. ### Claim 5 (depends on 1) The flow hydro turbine according to claim 1, characterized in that, the stator (S), in a part in which the rotor (R) is mounted, is made with a cut-out, wherein dimensions and shape of the cut-out being defined such that there is a clearance between the rotor (R) and the stator (S) when they are assembled together. ### Claim 6 (depends on 1) The flow hydro turbine according to claim 1, characterized in that, inside the stator (S) there is a collector (Z) which is separated from the cut-out in which the rotor (R) is mounted, where the water is collected and flows into the grooves (U) of the rotor (R) through openings (O), located at a bottom of the collector (Z), and the stator (S) has an extension for a pipe connection (V) for water inflow into the hydro turbine and optionally an extension for an output pipe connection (CV). ### Claim 7 (depends on 6) The flow hydro turbine according to claim 6, characterized in that, the openings (O) are positioned in a way that water from the collector (Z) flows onto both ends of the rotor (R), that is to parts of the rotor (R), which are the furthest from the central part of the rotor (R).