Extendable excavating screw unit equipped with hydraulic excavating auxiliary blades
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United States of America Patent
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Nov 10, 2009
Grant Date -
Dec 4, 2008
app pub date -
Feb 22, 2008
filing date -
May 28, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An excavating screw unit equipped with a hydraulic excavating auxiliary blades has developed for an auger crane, comprising: an extension unit having auxiliary excavating blade, cylinder mounting hole, built-in fluid passages in extension unit, hydraulic cylinder, piston, and extension guiding rods; an excavation column formed a hollow center of a square-shaped to mount on top of extension unit; an extension rod having an outer square-shape to fit into the excavation column, a built-in hydraulic passages in the extension rod, at top portion of the extension rod, an inlet and outlet that is bent right angle at top portion of the hydraulic passages to connect to hydraulic tubes, the extension rod is sliding to extend or retract through the excavation column. The extended excavating auxiliary blades are maintained by the pressurized fluid to prevent retracting by digging resistance during the excavating. Thus, this mechanized excavating device is easily digging a burial hole for a utility pole and underbracing.
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Cited Art Landscape
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