Radiator fan and engine cooling device using the same

Details Radiator fan and engine cooling device using the same Radiator fan and engine cooling device using the same

2006-05-02

2006-05-02

Look, Edward K. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Having clutch or brake means

C416S189000, C416S195000

Reexamination Certificate

active

07037077

ABSTRACT:
Whereas for each propeller blade of a radiator fan, an attachment angle θ1at a propeller blade base portion, projected onto a plane parallel to an attachment surface of the propeller blades with respect to the boss is set in a range of 35 to 45°, an attachment angle θ2of a propeller blade tip portion is set in a range of 15 to 22°. Seven propeller blades and a chord length Ct of the propeller blade tip portion, and an outer circumference length π×Df of the propeller blades are set to satisfy a relationship 0.65<7Ct/(π×Df)<0.85. A tip broadening ratio of the propeller blades is set to within a range Ct/Cb=1.5 to 2.1, based on the chord length Ct at the propeller blade tip portion, and a chord length Cb at the propeller blade base portion. A fan sweep angle θ3is set in a range of 15 to 25°.

REFERENCES:
patent: 4063852 (1977-12-01), O'Connor
patent: 4568242 (1986-02-01), Susa et al.
patent: 5326225 (1994-07-01), Gallivan et al.
patent: 53-022946 (1976-08-01), None
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patent: 07-030327 (1995-06-01), None
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patent: 2001-193693 (2001-07-01), None
patent: 2001-227343 (2001-08-01), None
International Search Report for PCT/JP02/10629 mailed Dec. 10, 2002.
International Preliminary Examination Report for PCT/JP02/10629 completed on May 21, 2003.

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