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
Wireless communication system and method of calling terminal
Passenger information module with map split screen of graphical user interface
Power semiconductor device
Electrostatic discharge (ESD) protection device
Substrate processing apparatus, substrate processing method and storage medium
Retractable limb guard
Automated fault reporting in femto cells
  Randomly Featured Patents
Profiling of composite physical devices for monitoring/control systems
Mobile chair with removable rear wheel assembly
Apparatus for grip enhancement
Apparatus, method and system for providing information to a called party in multiple leg telecommunication sessions
System and method for tracking the return of loaned or rented items
Image reading apparatus
Radio communication system with request re-transmission until acknowledged
Pulse width modulator control circuit
4-phenyl-1,3-benzodiazepines and 2-amino-.alpha.-phenylphenethylamines for treating convulsions and protecting neurons
Continuous constraint packaging method and apparatus