Blower device

Details Blower device Blower device

1994-03-28

1996-05-07

Look, Edward K.

Rotary kinetic fluid motors or pumps

With sound or vibratory wave absorbing or preventing means...

415185, 416223R, 416238, F04D 2966

Patent

active

055139515

ABSTRACT:
The present invention relates to a fan having a plurality of equiangularly spaced, radially extending blades. The spacing provided between adjacent blades is substantially constant along the entire radial length of the blade for increasing a blowing efficiency, while also allowing a mold separation operation along the axial direction during the formation of the fan using a mold. In a case where the blade is a sweep-forward blade, the number of the blades is seven or more and has a sweep-forward angle of the blades between 35 to 45 degrees. Finally, in case where an electric motor for rotating the fan is supported by stays, the number of stay member and the number of blades, which are not evenly dividable by each other, should satisfy a relationship of 2,000<x.times.y.times.Nf/60, where N.sub.f is a rotational speed of the fan.

REFERENCES:
patent: 4569631 (1986-02-01), Gray, III
patent: 4569632 (1986-02-01), Gray, III
patent: 4685513 (1987-08-01), Longhouse et al.
patent: 5273400 (1993-11-01), Amr
patent: 5297931 (1994-03-01), Yapp et al.
patent: 5312230 (1994-05-01), Oda et al.
patent: 5320493 (1994-06-01), Shih et al.
patent: 5326225 (1994-07-01), Gallivan et al.

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