Ventilating device in power driven tool
AssigneeMakita Corporation
InventorsKatsumi Ohkouchi, Makoto Nakabayashi, Tomohiro Hachisuka
Life of this patent
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Abstract
A ventilating device in a power driven tool has a fan driven by a motor for cooling the motor and has an air flow channel for the air to flow to the outside after passing around the motor. The ventilating device includes an air passage member disposed in the air flow channel on the downstream side of the fan to form a part of the air flow channel. The air passage member includes a plurality of blow windows and a plurality of partition walls for separating the blow windows from each other. The blow windows are positioned in series in the rotational direction of the fan. The partition walls have different heights relative to and in the direction toward the fan such that the heights increase in the rotational direction of the fan.
Claims10
In a power driven tool having a fan driven by a motor, the improvement comprising:
- a blow window structure positioned to confront the fan in an axial direction of the fan, said blow window structure including:
- a plurality of windows positioned in series in the rotational direction of the fan and open in the axial direction of the fan;
- and
- a plurality of partition walls separating said windows from each other;
- said partition walls having different heights relative to and in the direction toward the fan such that the heights increase in the rotational direction of the fan.
A ventilating device in a power driven tool having a fan driven by a motor for cooling the motor and having an air flow channel for the air to flow to the outside after passing around the motor, comprising:
- an air passage member disposed in the air flow channel on a downstream side of the fan opposite said motor and axially aligned with said fan to form a part of the air flow channel;
- said air passage member including a plurality of blow windows open in the axial direction of the fan and a plurality of partition walls separating said blow windows from each other;
- said blow windows being positioned in series in the rotational direction of the fan;
- and
- said partition walls having different heights relative to and in the direction toward the fan such that the heights increase in the rotational direction of the fan.
Dependencies are inferred from the claim text.