Fan and blower unit having the same

Details Fan and blower unit having the same Fan and blower unit having the same

2006-09-25

2009-12-15

Kershteyn, Igor (Department: 3745)

Rotary kinetic fluid motors or pumps

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

C415S173600, C415S228000, C416S16900R, C416S189000, C416S192000, C416S195000, C416S500000

Reexamination Certificate

active

07632063

ABSTRACT:
A fan has a plurality of blades extending in a radial direction with respect to a rotation axis and a ring portion disposed on radial outside edges of the blades. Further, the fan has a first connecting wall and a second connecting wall. The first connecting wall extending from the ring portion to a portion of the radial outside edge of each blade, the portion protruding from the ring portion toward an upstream position with respect to an air flow direction. The second connecting wall has a generally triangular shape. The second connecting wall continuously extends from the first connecting wall and connects to the ring portion on a leading side of the first connecting wall with respect to a rotation direction of the blade. The fan is for example housed in a shroud, thereby to construct a blower unit.

REFERENCES:
patent: 855131 (1907-05-01), Preidel
patent: 1441852 (1923-01-01), Heintz
patent: 4505641 (1985-03-01), Tsuchikawa et al.
patent: 5405243 (1995-04-01), Hurley et al.
patent: 5437541 (1995-08-01), Vainrub
patent: 6027307 (2000-02-01), Cho et al.
patent: 7083387 (2006-08-01), Chen et al.
patent: 2005/0074333 (2005-04-01), Iwasaki et al.

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