Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
LO generation with deskewed input oscillator signal
Pyroelectric detector, pyroelectric detection device, and electronic instrument
Pipette device
Copolymer for positive type lithography, polymerization initiator used in production of said copolymer, and composition for semiconductor lithography
Perfume bottle
Multi-radio coexistence
Method and system for physical verification using network segment current
  Randomly Featured Patents
Stepping motor direct drive adjustable pedal assembly
Colorless fast-drying ink compositions for printing concealed images detectable by fluorescence
Dual detection scheme for compressive receivers
Process for alkylating salicylates with polyalphaolefin
Inflatable information carrier
Outboard drive device
Method of manufacturing an FET with a second insulation layer covering angular portions of the activation layer
Shirt packed in a can-like arrangement for presentation
Microbial production of L-ascorbic acid
Method and device for monitoring medication usage