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US 12,000,410 B2Granted
Shroud for an air moving device
AssigneesToyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki Kaisha
InventorsTaehwa Lee, Tsuyoshi Nomura, Ercan Mehmet Dede
Life of this patent
Estimating the term…
Abstract
A shroud for an air moving device includes a shroud body configured to at least partially surround one or more blades. The shroud body defines an annular cavity and an annular opening. The annular opening faces the one or more blades. The shroud also includes a Helmholtz resonator defined by the annular cavity and the annular opening. The Helmholtz resonator is configured to reflect sound generated by the one or more blades out of the shroud body.
Claims18
A device, comprising:
- an aerial vehicle including a rotor having one or more blades;
- a shroud body for the rotor configured to surround the one or more blades, the shroud body having a conically shaped inner diameter directly facing the rotor defined between a top edge and a bottom edge, the top edge having a larger circumference than the bottom edge, and the shroud body defining an annular cavity and an annular opening that extends continuously along the conically shaped inner diameter of the shroud body, the annular opening facing the one or more blades;
- and
- a Helmholtz resonator defined by the annular cavity and the annular opening and configured to reflect sound generated by rotation of the one or more blades toward the top edge and out of the shroud body.
1 more element
A device, comprising:
- an aerial vehicle including a rotor having one or more blades;
- a shroud body for the rotor configured to surround the one or more blades, the shroud body having a conically shaped inner diameter directly facing the rotor and defined between a top edge and a bottom edge, the top edge having a larger circumference than the bottom edge, and the shroud body defining a hollow interior and an annular opening that extends continuously along the conically shaped inner diameter of the shroud body;
- one or more walls located inside the hollow interior and configured to divide the hollow interior into a plurality of cavities;
- and
- a plurality of Helmholtz resonators defined by the plurality of cavities and the annular opening and configured to reflect sound generated by rotation of the one or more blades toward the top edge and out of the shroud body.
2 more elements
Dependencies are inferred from the claim text.