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US 4,398,360 AGranted
Pole excavating device
OwnerDonald L. Kesslerinventor
Life of this patent
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OwnerDonald L. Kesslerinventor
Estimating the term…
A device for excavating material from around the periphery of a pole embedded in the ground. A frame is provided with a plurality of pole-engaging rollers adapted for placement against the pole periphery. An endless chain having one portion looped about the pole and another portion looped about sprockets carried by the frame secures the device to the pole. The sprockets are rotatably positioned on the frame at a slight inclination to a true horizontal plane and engage the chain for transporting the frame along the chain and in a descending helical path along the pole. A chain tension sprocket is provided and is movable toward and away from the pole axis to adjust the chain tension. An auger is carried by the frame and is adapted to cut an annular opening in the ground around the pole. Drive means are provided to urge the frame, and thereby the auger, around the pole and in a downward direction.
A device for excavating ground material about an upright pole embedded therein, said device comprising a frame, an auger mounted on said frame, a plurality of rollers rotatably mounted on said frame and engageable with the pole surface, attaching means carried by said frame to attach said device to a pole, said attaching means having a portion thereof adapted to be looped about a pole in a helical path, means for revolving said frame about said pole and along said looped portion of said attaching means, said revolving means including means for gradually displacing said frame in a direction generally parallel to the axis of said pole and in a generally helical path.
Dependencies are inferred from the claim text.