Handheld blower having engine cooling flow
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United States of America Patent
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Sep 15, 2020
Grant Date -
Feb 22, 2018
app pub date -
Sep 13, 2017
filing date -
Feb 20, 2013
priority date (Note) -
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Abstract
A handheld blower includes a housing, the housing including an air inlet and a duct assembly, the duct assembly including a duct, a motor and a fan mounted in the duct, a battery, a handle, and a blowpipe which defines a central axis. Along the direction of the central axis, the area of the flowing cross-section of an air passage at the rear end of the fan adjacent to the air inlet is larger than that of the flowing cross-section of an air outlet of the blowpipe, and the rate between the area of the flow cross-section of the air outlet of the blowpipe and the area of the flow cross-section of the flow-through area at the position of the fan is greater than or equal to 0.8.
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