Resources Contact Us Home
Apparatus for providing a support column

Image Number 15 for United States Patent #8043028.

A primary earth penetrating mandrel formed of a hollow shell steel plate octagonal in cross-section has an upper end and a blunt lower end joined by an upwardly and outwardly tapered wall. The mandrel is driven downwardly in the earth to simultaneously form a vertical tapered cavity while compacting the sidewall of the cavity to provide structural integrity. The mandrel is then moved upwardly from the bottom of the cavity and aggregate is deposited in the bottom of the cavity following which the mandrel is lowered so that its blunt lower end engages the deposited aggregate and densifies the aggregate by vertical vibratory action and static force with these steps being repeated until the pier top is near the surface of the earth at which time the upper aggregate portions are densified by either the primary mandrel or a secondary mandrel having a substantially larger lower end surface than the lower end surface of the primary mandrel. A second embodiment includes a conduit in the primary mandrel for injecting concrete or grout into aggregate previously deposited in the cavity.

  Recently Added Patents
Device and method to automatically configure port forwarding
Light-emitting device with a spacer at bottom surface
Veronica plant named `Amethyst Plume`
Fixing device and image forming apparatus
Signal processor and signal processing method
Egg separator
  Randomly Featured Patents
Gas downdraft range with selectively interchangeable burners
Method and apparatus for linking a video segment to another segment or information source
Seatbelt tightening device
Semiconductor memory device
Management of non-volatile memory systems having large erase blocks
Optical disk with vibration dampening
Attachment for a hair dryer
Flute chorus generator for a polyphonic tone synthesizer
Helm chair
Ink composition, ink set including the composition, cartridge including the ink set, and inkjet recording apparatus including the cartridge