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
Single well reservoir characterization apparatus and methods
Device and method for arranging vials
Fingerprinting apparatus, system, and method
Victim port-based design for test area overhead reduction in multiport latch-based memories
Shallow trench media
Digital photographing apparatus
Analog-to-digital converter with input voltage biasing DC level of resonant oscillator
  Randomly Featured Patents
Bis-dioxopiperazine derivatives, process for their preparation, antitumor agents comprising them and compositions containing them
Capacitor discharge ignition system and method of manufacture thereof
High rate runlength limited codes for 10-bit ECC symbols
Keyboards for homes
Electric sharpener
Umbrella handle
Cementing tool with protective sleeve
Electromagnetic object detector with test electrode for a medical diagnostic apparatus
Image forming apparatus with demountable sheet conveyor unit in main body for receiving sheets from optional sheet stack connectable thereto
Method of generating a schematic driven layout for a hierarchical integrated circuit design