Static structures (e.g. – buildings) – With piercing or expanding earth anchor – Auger-type penetrator
Reexamination Certificate
2000-05-17
2001-10-09
Friedman, Carl D. (Department: 3635)
Static structures (e.g., buildings)
With piercing or expanding earth anchor
Auger-type penetrator
C248S156000, C248S545000, C256SDIG005
Reexamination Certificate
active
06298611
ABSTRACT:
FIELD OF THE INVENTION
This invention relates in general to anchors that are bored into the ground and more specifically to a ground anchor having a cap for compressing soil above an auger, the cap being able to tilt so as to align with the contour of the grade.
BACKGROUND OF THE INVENTION
Ground anchors of the auger type tend to loosen the soil as the auger is screwed into the earth. This tends to make the anchor less stable. Particularly, the anchor shaft may be able to move back and forth laterally in the loosened soil and thereby loosen the anchor such that the anchor becomes ineffective.
Accordingly, there has been a need for an improved ground anchor.
SUMMARY OF THE INVENTION
The invention is a ground anchor for boring in the soil, and it generally includes an elongate shank having an auger on its lower end and a attachment mechanism on its upper end for attachment of anchor lines, a compression cap, and a bearing member.
The compression cap is a generally disk-shaped plate of uniform thickness having an aperture freely journaling it on the shank above the soil such that said plate can freely tilt through a tilt angle to align with the surface of the soil. Preferably, a side slot provides entry of the shaft to the central aperture. The cap has a generally planar downward facing surface for compressing soil between the cap and the auger blades. Preferably, the cap has peripheral side walls extending upwards or downwards from the perimeter of the plate for bearing against the soil for presenting a larger side surface area than the plate for preventing lateral movement.
The bearing member includes a bearing surface adapted for applying bearing forces on the compression cap over the tilt angle of the compression cap such that the downward facing surface of the compression cap compresses soil between the cap and the auger blades. In exemplary embodiment, the bearing surface is inverse conical or spherical.
Other features and many attendant advantages of the invention will become more apparent upon a reading of the following detailed description together with the drawings wherein like reference numerals refer to like parts throughout.
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Oliver Evon L.
Oliver James
Friedman Carl D.
Slack U.
Tervo Calif
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