Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Chao-Fu Yang0
Shun-Chen Chang0
Date of Patent
January 21, 2020
0Patent Application Number
150106480
Date Filed
January 29, 2016
0Patent Citations Received
Patent Primary Examiner
Patent abstract
An impeller comprises a hub and a plurality of blades surrounding the hub. The hub comprises a shaft. Each blade includes a leading edge, an outer edge, a middle portion and a trailing edge. The leading edge, the outer edge and the trailing edge are around three sides of the middle portion. From the hub outwardly shaft, the height of the leading edge to the horizontal plane of the lowest of the blade gradually decreases first and then gradually increases.
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