Plastic fan

Details Plastic fan Plastic fan

1997-08-08

1999-07-27

Verdier, Christopher

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Laminated, embedded member or encased material

416241A, 416244R, F04D 2934

Patent

active

059279494

ABSTRACT:
A plastic fan is composed of a plastic-made fan portion and a metal-made insert portion integrally embedded in the plastic-made fan portion. The fan portion is formed of fan blades and a fan boss. The insert portion is formed of a ring-shaped flat base portion and a bent portion extending upright from an outer peripheral edge of the base portion and having a substantially ring-shaped configuration in plan and a flattened U-shaped configuration in cross-section. The insert portion defines lock holes arranged at predetermined intervals in an outer peripheral portion of the metal-made insert portion and extending through the metal-made insert portion from an outer side thereof to an inner side thereof. The inner peripheral edge portion of each of the lock holes is formed of a smooth flat surface on at least one of the outer side and the inner side of the metal-made insert portion.

REFERENCES:
patent: 3318388 (1967-05-01), Bihlmire
patent: 4153389 (1979-05-01), Boyd
patent: 5226807 (1993-07-01), By et al.
patent: 5507622 (1996-04-01), Avny
patent: 5593283 (1997-01-01), Scott
patent: 5720595 (1998-02-01), Avny

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