Soil displacement auger head for installing piles in the soil
First Claim
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1. A soil displacement auger head for installing piles in the soil, comprising:
- a tip;
a displacement body having at least over a lower portion a core diameter increasing in diameter in a direction away from said tip; and
at least one screw flange extending at least over said lower portion of the displacement body;
wherein said screw flange has a pitch which increases at least over said lower portion of the displacement body in the direction away from said tip.
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Abstract
Soil displacement auger head for installing piles in the soil, having a tip, a displacement body having at least over a lower portion a core diameter increasing in diameter in a direction away from the tip, and at least one screw flange extending at least over the lower portion of the displacement body. To obtain a more efficient displacement, the pitch of the screw flange increases and the core diameter of the displacement body increases preferably discontinuously via a number of transition slopes.
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Citations
18 Claims
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1. A soil displacement auger head for installing piles in the soil, comprising:
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a tip; a displacement body having at least over a lower portion a core diameter increasing in diameter in a direction away from said tip; and at least one screw flange extending at least over said lower portion of the displacement body; wherein said screw flange has a pitch which increases at least over said lower portion of the displacement body in the direction away from said tip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A soil displacement auger had for installing piles in the soil, comprising:
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a tip; a displacement body having at least over a lower portion a core diameter increasing in a direction away from said tip; and at least one screw flange extending at least over said lower portion of the displacement body; wherein said screw flange has a pitch which increases at least over said lower portion of the displacement body in the direction away from said tip and the core diameter of the lower portion of the displacement body increases discontinuously according to said screw flange via a predetermined number of transition slopes.
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18. A soil displacement auger had for installing piles in the soil, comprising:
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a tip; a displacement body having at least over a lower portion a core diameter increasing in a direction away from said tip; and at least one screw flange extending at least over said lower portion of the displacement body; wherein said screw flange has a pitch which increases at least over said lower portion of the displacement body in the direction away from said tip and said displacement body has over an upper portion a core diameter which decreases in the direction away from said tip, this upper portion comprising at least two screw flange parts each extending over at least half of the circumference of the displacement body, at the most over the perimeter of this displacement body, and overlapping each other partially and having a screw direction opposite to the screw direction of the screw flange on the lower portion of the displacement body.
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Specification