Apparatus for detecting rammer tip-over
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United States of America Patent
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Oct 17, 2017
Issued Date -
Mar 20, 2014
app pub date -
Sep 10, 2013
filing date -
Sep 20, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
In an apparatus for detecting tip-over of a rammer equipped with a crankcase accommodating an output shaft rotatably connected to an engine, a movable unit accommodating a converter mechanism for converting rotation of the output shaft to vertical motion of a movable member, a tamping shoe connected to the movable unit, and a handle operable by an user, and adapted to thrust upward in the gravitational direction by the vertical motion of the movable member and go into a free fall to compact a ground surface, it is determined whether a detected engine speed becomes equal to or smaller than a threshold value set lower than an engine idling speed when the engine has been operated at a rammer working speed set greater than the engine idling speed, and if it does, it is discriminated that the rammer has tipped over.
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