Vacuum-assisted hole digger
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United States of America Patent
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Aug 20, 2019
Grant Date -
N/A
app pub date -
Nov 29, 2017
filing date -
Nov 29, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A vacuum-assisted hole digger includes a central vacuum tube extending at an upper end from a handle assembly to a digger head assembly attached at a lower end, the digger head including a scraper blade assembly within a housing formed of an orifice plate and saw blade. The orifice plate attaches to the central vacuum tube, an extraction aperture formed in the orifice plate opening into the tube. Air entry apertures formed in the orifice plate outside of the vacuum tube have a total area smaller than the area of the evacuation aperture, which obtains enhanced airflow rates through the digger housing upon connection of the upper vacuum tube opening with a vacuum source. The blade edges of the scraper blade assembly abrasively engage the soil face when digging in a manner that obtains reduction in soil particle size and enhances soil particle airflow entrainment.
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