Blower with an improved shroud assembly

Details Blower with an improved shroud assembly Blower with an improved shroud assembly

1994-03-28

1995-10-24

Look, Edward K.

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Vane or deflector

415119, 416169A, 416244R, 416247R, 123 4149, 264318, 425577, 425DIG58, F04D 2954

Patent

active

054604850

ABSTRACT:
A blower having an axial fan driven by a rotating drive source and enclosed by a shroud assembly including a substantially cylindrical fan shroud enclosing an outer circumference of the axial fan, and a protective unit provided with a plurality of support beams extending from the fan shroud toward an air intake side of the blower and cooperating with a plurality of ring-like members so as to form a protective net member for preventing entrance of any unfavorable substances such as foreign matter or a human finger into the shroud assembly, and a plurality of support ribs operating as a physical rib members and as protective members preventing entrance of the unfavorable substances from a radially outer region of the blower into the interior of the shroud assembly. The support ribs are arranged so as to provide a large spacing between the ribs and the outer circumference of the axial fan to thereby reduce generation of turbulence of the intake air resulting in a lowering of the hissing or whistling sound of the air flowing across the support ribs and through the axial fan.

REFERENCES:
patent: 5102607 (1992-04-01), Hickman et al.
patent: 5131352 (1992-07-01), Hoshino et al.
patent: 5232718 (1993-08-01), Miyazawa et al.
patent: 5304040 (1994-04-01), Wang
Japanese Publication "Automobile Engineering", vol. 43, No. 12, Dec. 1989 pp. 98-103.

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