Engine-powered work tool provided with wind governor
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United States of America Patent
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Apr 26, 2016
Grant Date -
Feb 19, 2015
app pub date -
Aug 13, 2014
filing date -
Aug 19, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
An engine-powered work tool includes an engine having a crank shaft, an output controller and a wind governor. The output controller includes an output control shaft angularly rotatable about its axis for controlling a rotation speed of the crank shaft. The wind governor can control the angular rotation of the output control shaft and includes: a governor plate for receiving cooling air generated at a cooling fan connected to the crank shaft; an arm fixed to the output control shaft; and a governor spring connected to the arm for biasing the output control shaft to increase the rotation speed of the crank shaft. The governor plate functions to bias the output control shaft to decrease the rotation speed of the crank shaft upon receipt of the cooling air. The governor spring has an end changeable in position relative to the output controller among a plurality of prescribed positions.
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