Helical screw pile
AssigneeHubbell Incorporated
InventorsAlan J. Lutenegger, Gary L. Seider
Life of this patent
Estimating the term…
Abstract
A helical screw pile includes a longitudinal shaft having a top end and a bottom end with a plurality of helical plates arranged on the shaft in increasing diameter from the top to the bottom. The first helical plate is located toward the bottom of the shaft and has the largest diameter. The second helical plate is located above the first helical plate and has a diameter smaller than that of the first plate. The third helical plate is located above the second helical plate and has a diameter smaller than that of the second plate. The helical plate with the smallest diameter is located toward the top of the shaft. The distance between the first helical plate and the second helical plate is larger than the distance between the second helical plate and the third helical plate.
Claims24
A helical screw pile for penetrating the ground and forming a support, the screw pile comprising:
- a longitudinal shaft having a trailing top end adapted for coupling to a drive assembly and to a structure supported by said helical screw pile and a leading bottom end for penetrating the ground;
- a plurality of spaced-apart helical plates arranged on said longitudinal shaft in increasing diameter from the top end to the bottom end,
- a first of said plurality of helical plates being disposed toward the leading bottom end of said shaft and having a first diameter;
- and
- a second of said plurality of helical plates being spaced from said first helical plate toward said trailing top end and having a second diameter that is smaller than said first diameter.
A helical screw pile adapted for penetrating the ground, the screw pile comprising:
- a longitudinal shaft having a first leading end for penetrating the ground and a second trailing end for coupling to a drive assembly and to a structure to be supported;
- a first helical plate having a first diameter;
- a second helical plate having a second diameter smaller than said first diameter and being spaced from said first plate a first distance toward said trailing end;
- a third helical plate having a third diameter smaller than said second diameter and being spaced from said second plate a second distance toward said trailing end;
- and
- said first distance between said first plate and said second plate being larger than the second distance between said second plate and said third plate,
- said first plate being located toward said leading end of said shaft with respect to said second plate.
A ground anchor for penetrating the ground to anchor a structure, the ground anchor comprising:
- a shaft having a longitudinal dimension with a first leading end for penetrating the ground and a second trailing end for coupling to a drive assembly and to the structure;
- a first helical plate coupled to said shaft proximate said first end, said first helical plate having a first diameter and requiring a first torque for penetrating the ground;
- and
- a second helical plate coupled to said shaft and longitudinally spaced from said first helical plate toward said second trailing end, said second helical plate having a second diameter less than said first diameter and requiring a second torque for penetrating the ground that is less than said first torque, where the greatest torque is concentrated proximate said first end of said shaft upon rotation of said shaft and penetration into the ground.
Dependencies are inferred from the claim text.