Airfoil blade for impeller fan and manufacturing method thereof

Details Airfoil blade for impeller fan and manufacturing method thereof Airfoil blade for impeller fan and manufacturing method thereof

1989-04-27

1990-11-20

Kwon, John T.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Hollow

416231R, 415119, 2988972, B64C 1124

Patent

active

049715216

ABSTRACT:
An airfoil blade for a fan impeller, includes one blade surface portion formed by extrusion molding. A plurality of ribs are integrally formed with the one blade surface portion to extend upwardlyf rom it in generally a vertical direction and having heights as will provide a curve line for the other curved blade surface portion when end faces of the ribs are connected to each other. A sheet material is applied onto the ribs along their end faces to provide the other curved blade surface portion so as to form a blade configuration of the airfoil blade having a leading edge and a trailing edge and including hollow portions in it.

REFERENCES:
patent: 2454200 (1948-11-01), Perkins
patent: 2541661 (1951-02-01), Palmatier et al.
patent: 2701696 (1955-02-01), Felt
patent: 2975962 (1961-03-01), Busquet
patent: 3093219 (1963-06-01), Ramme
patent: 3429023 (1969-02-01), Blythe et al.
patent: 4417381 (1983-11-01), Higgenbotham

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