Centrifugal blower and portable power working machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 28, 2003
Grant Date -
Sep 13, 2001
app pub date -
Feb 26, 2001
filing date -
Mar 10, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A centrifugal blower comprises an impeller; and a casing, having an intake port disposed at a region opposing the air inlet portion of impeller, for accommodating the impeller. The casing is provided with a port cover constituted by rod-shaped members which are arranged in a net structure, in order to cover the intake port of casing. A trailing edge portion of the rod-shaped members is formed with a slanted surface. Due to this slanted surface, the flow of air passing through the port cover so as to flow into the air inlet portion is smoothly deflected away from the axis of rotation of impeller. As a consequence, swirls are restrained from occurring, whereby a sound-insulating effect is exhibited.
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Cited Art Landscape
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