Portable driving device
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United States of America Patent
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Oct 13, 2015
Grant Date -
May 9, 2013
app pub date -
Aug 29, 2012
filing date -
Aug 29, 2011
priority date (Note) -
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Abstract
A portable driving device for permanently driving stakes, survey flags, posts, or the like, of varying sizes and shapes, into the ground. The invention provides for powering the device by a pressurized fluid with a single power cylinder, a valve control assembly including a self-exhausting spool valve controlled by a rod that runs through the spool valve, and safety switches in series for controlling delivery of pressurized fluid to the driving device.
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