SWITCHING DEVICE FOR USE IN A RATCHET WRENCH
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United States of America Patent
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Issued Date -
Sep 24, 2015
app pub date -
Mar 18, 2015
filing date -
Mar 21, 2014
priority date (Note) -
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Abstract
A switching device includes a flow path unit, a control unit and a valve unit. The flow path unit includes an installation flow path, and a guide flow path communicating with an end portion of the installation flow path. The control unit includes a stem member movable within the installation flow path. The valve unit includes a valve member operable to permit compressed air to flow into the end portion of the installation flow path through the guide flow path or into an opposite end portion of the installation flow path for driving movement of the stem member along the installation flow path.
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