Fan guard for blower unit

Rotary kinetic fluid motors or pumps – With separating means or guard for solid matter in working...

Reexamination Certificate

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Details

C415S119000, C415S211200, C416S24700A

Reexamination Certificate

active

10504271

ABSTRACT:
A fan guard includes a plurality of extending ribs extending from a blocking plate to an outer frame, a plurality of inner ribs arranged between the extending ribs and extending from the blocking plate to the substantial center in the radial direction, and a plurality of outer ribs arranged between the extending ribs and extending from the substantial center in the radial direction to the outer frame. The number of the inner ribs is set smaller than the number of the outer ribs. Hence, strength to prevent bending of the fan guard due to load application in the axial direction is ensured and increase in ventilating resistance of forced airflow (W) from a blower fan is suppressed.

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patent: WO-02/061343 (2002-08-01), None

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