Centrifugal type blower

Details Centrifugal type blower Centrifugal type blower

2009-07-16

2011-12-13

Look, Edward (Department: 3745)

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Casing having tangential inlet or outlet

C415S206000, C415S207000, C415S212100, C415S119000

Reexamination Certificate

active

08075262

ABSTRACT:
A centrifugal-type blower includes a shaft, a fan, and a casing. The casing includes an inlet, an air passage, and a side wall part. A first distance from a center of the fan to the wall part at an inlet side end portion in a radial direction of the fan gradually increases from a volute start part to a volute end part. A second distance from the center to the wall part at any position thereof from an intermediate position to a counter-inlet side end portion in the radial direction is larger than the first distance within a first range. The second distance gradually decreases from the volute start part to a predetermined position. The second distance has the same length as the first distance within a second range.

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patent: 2007-239538 (2007-09-01), None
Office action dated Apr. 20, 2010 in corresponding Japanese Application No. 2008-187166.

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