US Patent 11549519 Fan blade device
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Edits on 25 Oct, 2023
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Patent Inventor Names
Chang-Sung Wang0
Mei-Chih Fang0
Edits on 23 Apr, 2023
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US Patent 11549519 Fan blade device
Article
A fan blade device includes a plurality of main fan blades and extension fan blades. Each main fan blade includes a main fan blade body arranged obliquely, a plurality of first protrusions, and at least one engaging groove. Each extension fan blade includes an extension fan blade body arranged obliquely and having a top surface that is contiguously flush with a top surface of the main fan blade body of a respective main fan blade, a plurality of second protrusions respectively abutting against the first protrusions of the respective main fan blade, and at least one engaging piece engaging the at least one engaging groove of the respective main fan blade.
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Patent Jurisdiction
Patent Number
115495190
Date of Patent
January 10, 2023
0Patent Application Number
176771030
Date Filed
February 22, 2022
0Patent Citations
Patent Primary Examiner
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