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US 7,396,208 B1Granted
Divided blade rotor
OwnerMahmood H. Hussaininventor
Life of this patent
Estimating the term…
Abstract
A novel rotor blade is presented with an integral tip portion from which two diverging blade portions extend to separated respective roots. The blade may have conventional airfoil sections, or may be made from flat or curved sheet material. The two rotor blade portions may have dissimilar angles of incidence. Leading edge holes or slots are located behind the leading edge of the blade. The two blade portions may have distinct angles of incidence.
Claims12
A blade for operating in a relatively moving fluid medium comprising:
- a blade tip;
- first and a second blade portions extending divergingly from the blade tip to respective blade roots, each blade root separated from the other, such that an angled gap is defined between the blade portions;
- the first blade portion having a leading edge and a plurality of through-blade bleed ports adjacent the leading edge.
A device for moving fluid, comprising:
- at least two rotor blades oriented symmetrically about a central axis of a rotatable base;
- each rotor blade comprising:
- a blade tip;
- first and a second blade portions;
- the blade portions extending divergingly from the blade tip to respective blade roots that are axially separated and secured to the rotatable base such that an angled gap is defined between the blade portions;
- each first blade portion also having:
- a leading edge portion extending, at decreased angle of incidence, from the first blade portion, and
- and a plurality of bleed ports adjacent the leading edge.
5 more elements
Dependencies are inferred from the claim text.