Hand-guided machine tool comprising a radial blower
AssigneeRobert Bosch GmbH
InventorsMartin Kummer, Werner Rieker, Eckerhard Strotgen, Eberhard Prahst
Life of this patent
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Abstract
A hand-guidable electric machine tool has a casing having an air guide duct, a tool part, a motor for driving the tool part, and a radial blower for cooling the motor, the radial blower having a fan wheel for forming a static pressure differential. The air guide duct has an inlet opening and an outlet opening and continuously widening in cross-section in a direction of the outlet opening. The cross-section measured in radial direction of the inlet opening of the air guide duct is smaller than the cross-section of the outlet opening.
Claims17
A hand-guidable electric machine tool, comprising a casing having an air guide duct;
- a tool part;
- a motor for driving said tool part;
- and a radial blower for cooling said motor, said radial blower having a fan wheel for forming a static pressure differential, said air guide duct being spirally wound and having an inlet opening and an outlet opening extending both in axial and radial direction and having a cross-section which continuously widens starting from said inlet opening all the way from said inlet opening to said outlet opening, and ending at said outlet opening, said outlet opening is offset in the axial direction at a greater distance from said fan wheel than said inlet opening, a cross-section measured in radial direction of said inlet opening of said air guide duct being smaller than a cross-section of said outlet opening.
Dependencies are inferred from the claim text.