US2004076515A1PendingUtilityA1

Vortex fan blade unit

38
Priority: Oct 21, 2002Filed: Oct 21, 2002Published: Apr 22, 2004
Est. expiryOct 21, 2022(expired)· nominal 20-yr term from priority
Inventors:Hsin-Mao Hsieh
F04D 29/329F04D 29/281
38
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

A vortex fan blade unit has multiple arc protrusions disposed on the surface of the body of the fan blade unit for the airflow on its surface to be guided to where fan blades rotate by compromising contour of those arc protrusions thus to create vortex for increasing air volume delivered while reducing harmonic vibration of the fan blades for noise reduction.

Claims

exact text as granted — not AI-modified
I claim:  
     
         1 . A vortex fan blade unit includes a fan blade unit, a body of fan blade unit and multiple fan blades; wherein, multiple arc protrusions in crescent shape being provided on the surface of the body of the fan blade unit; those protrusions being arranged at equal spacing, equal angle and in radius; characterized by that airflow close to the surface of the body of the fan blade unit being guided to where those fan blades rotate by compromising the contour of the arc protrusion to create vortex, thus to increase air volume; harmonic vibration generated by those fan blades being significantly reduced by a disturbance created by those arc protrusions; thus to reduce noise created during rotation of those fan blades.

Join the waitlist — get patent alerts

Track US2004076515A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.