# US 11,898,533 B2 · Wind-powered generator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,898,533 B2 - Document ID: US11898533B2 - Status: Granted - Kind: B2 - Application number: 18/171,726 - Filed: 2023-02-21 - Published: 2023-06-29 - Granted: 2024-02-13 - Earliest claimed: 2020-12-17 - Assignees: David Papini - Applicants: David Papini - Inventors: David Papini - Web page: https://patentgrep.com/patent/US11898533B2 ## CPC - F03D 1/025: {coaxially arranged} - F03D 1/04: having stationary wind-guiding means, e.g. with shrouds or channels (F03D9/35 takes precedence) - F03D 9/25: the apparatus being an electrical generator (F03D9/22 takes precedence) - F03D 9/45: Building formations - F03D 80/82: {of electrical components} - H02K 5/207: {with openings in the casing specially adapted for ambient air} - H02K 7/1838: {Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine} - F03D 80/60: Cooling or heating of wind motors - F05B 2220/706: an electrical generator - F05B 2230/31: Layer deposition - Y02E 10/72: Wind turbines with rotation axis in wind direction - F03D: WIND MOTORS - 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 A wind-powered generator includes a housing having an inlet, an outlet, and a throat that are coaxial about an axis of symmetry of the housing. A nacelle includes a first rotor mounted on a first end of the nacelle and positioned at least partially within the inlet, the first rotor outputting a first power output, and a second rotor mounted on a second end of the nacelle, the second rotor being positioned at least partially within the outlet and having a diameter less than the first rotor. The second rotor outputting a second power output. The first and second power outputs are combined to provide a combined power output, and a nacelle ratio between outer diameters of the nacelle at the inlet and at the outlet is between about 1.60-1.70, and a housing ratio between inner diameters of the housing at the inlet and at the outlet is about 1.85-1.97. ## Claims ### Claim 1 A wind-powered generator, comprising: a housing defining an internal volume and having an inlet, an outlet, and a throat, the inlet, the outlet, and the throat being coaxial about an axis of symmetry of the housing; wherein the internal volume of the housing is completely surrounded by the housing; a nacelle separate from, and mounted within, the internal volume, the nacelle comprising: a front rotor mounted on a first end of the nacelle, the front rotor comprising a first output shaft configured to output a first power output; and a rear rotor mounted on a second end of the nacelle opposite the first end, the rear rotor having a diameter less than the front rotor, wherein the rear rotor comprises a second output shaft configured to output a second power output; wherein the nacelle, the front rotor, and the rear rotor are housed entirely within the internal volume defined by the housing; wherein the first power output and the second power output are combined within the nacelle to provide a combined power output of the wind-powered generator. ### Claim 2 (depends on 1) The wind-powered generator of claim 1, wherein a nacelle ratio between an outer diameter of the nacelle at the inlet to an outer diameter of the nacelle at the outlet ranges from between about 1.60-1.70, and a housing ratio of an inner diameter of the housing at the inlet to an inner diameter of the housing at the outlet ranges from about 1.85-1.97. ### Claim 3 (depends on 1) The wind-powered generator of claim 1, wherein a midpoint-inlet-housing ratio between an inner diameter of the housing at a midpoint of the housing along the axis of symmetry and an inner diameter of the housing at the inlet ranges between about 0.60 to 0.80 and a midpoint-outlet-housing ratio between the inner diameter of the housing at the midpoint of the housing and an inner diameter of the housing at the outlet ranges between about 1.30 to 1.40. ### Claim 4 (depends on 1) The wind-powered generator of claim 1, wherein a midpoint-inlet-nacelle ratio between an outer diameter of the nacelle at a midpoint of the nacelle along the axis of symmetry and an outer diameter of the nacelle at the inlet ranges between about 0.70 to 0.85 and a midpoint-outlet-nacelle ratio between the outer diameter of the nacelle at the midpoint of the nacelle and an outer diameter of the nacelle at the outlet ranges between about 1.20 to 1.35. ### Claim 5 (depends on 1) The wind-powered generator of claim 1, wherein a ratio of a total length of the housing to an inlet diameter ranges between 1.25 and 1.60. ### Claim 6 (depends on 1) The wind-powered generator of claim 1, further comprising: an electrical generator operably connected to the first and second output shafts to generate the combined power output to produce electrical power. ### Claim 7 (depends on 1) The wind-powered generator of claim 1, further comprising: A plurality of electrical generators operably connected to the first and second output shafts to generate the combined power output to produce electrical power. ### Claim 8 (depends on 7) The wind powered generator of claim 7, further comprising a voltage converter configured to convert the electrical power to enable matching of an output voltage of the wind-powered generator to a voltage at an installation site. ### Claim 9 (depends on 1) A method for using the wind-powered generator of claim 1 comprising: mounting the wind-powered generator on a building; adjusting an output voltage of the wind-powered generator; and connecting the wind-powered generator to an electrical installation of the building. ### Claim 10 A portable wind-powered generator, comprising: a housing defining an internal volume, wherein the internal volume of the housing is completely surrounded by the housing; the housing comprising: an inlet forming a first opening to the internal volume and positioned at a first end portion of the housing; and an outlet forming a second opening to the internal volume and positioned at a second end portion of the housing; a front rotor having a first rotor diameter enabling rotation within the first opening, and comprising a first mounting portion and a first output shaft; a rear rotor having a second rotor diameter less than the first rotor diameter enabling rotation within the second opening, the rear rotor comprising a second mounting portion and a second output shaft; and a nacelle comprising: an inlet end configured to enable affixing of the first mounting portion to the nacelle; an outlet end configured to enable affixing of the second mounting portion to the nacelle; and a first electrical generator positioned within the nacelle, wherein the first output shaft is linked to the first electric generator; wherein the nacelle, the front rotor, and the rear rotor are housed entirely within the internal volume defined by the housing. ### Claim 11 (depends on 10) The portable wind-powered generator of claim 10, further comprising a second electrical generator positioned within the nacelle, wherein the second output shaft is linked to the second electric generator. ### Claim 12 (depends on 11) The portable wind-powered generator of claim 11, further comprising a voltage converter configured to receive electrical power from the first electrical generator and the second electrical generator and convert a voltage of the electrical power to a determined voltage. ### Claim 13 (depends on 12) The portable wind-powered generator of claim 12, wherein the voltage converter is positioned within the nacelle. ### Claim 14 (depends on 10) The portable wind-powered generator of claim 10, wherein a midpoint-inlet-housing ratio between an inner diameter of the housing at a midpoint of the housing along an axis of symmetry and an inner diameter of the housing at the inlet ranges between about 0.60 to 0.80, and a midpoint-outlet-housing ratio between the inner diameter of the housing at the midpoint of the housing and an inner diameter of the housing at the outlet ranges between about 1.30 to 1.40. ### Claim 15 (depends on 14) The portable wind-powered generator of claim 14, wherein a midpoint-inlet-nacelle ratio between an outer diameter of the nacelle at a midpoint of the nacelle along the axis of symmetry and an outer diameter of the nacelle at the inlet ranges between about 0.70 to 0.85 and a midpoint-outlet-nacelle ratio between the outer diameter of the nacelle at the midpoint of the nacelle and an outer diameter of the nacelle at the outlet ranges between about 1.20 to 1.35. ### Claim 16 A wind-powered generator, comprising: a housing defining an internal volume, wherein the internal volume of the housing is completely surrounded by the housing; the housing comprising: an inlet positioned at a first end portion of the housing; and an outlet positioned at a second end portion of the housing, the second end portion being at an opposite end of the housing from the first end portion; a front rotor having a first rotor diameter enabling rotation within the inlet; a rear rotor having a second rotor diameter less than the first rotor diameter enabling rotation within the outlet; a nacelle, wherein the nacelle, the front rotor, and the rear rotor are housed entirely within the internal volume defined by the housing; and a first electrical generator positioned within the nacelle and mechanically linked to the front rotor. ### Claim 17 (depends on 16) The wind-powered generator of claim 16, further comprising a second electrical generator positioned within the nacelle and mechanically linked to the rear rotor.