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
Light fitting
Time domain reflectometry step to S-parameter conversion
System and method for burstiness-aware scheduling and capacity assessment on a network of electronic devices
Diagnosis of wheel alignment using GPS
Optical transmission apparatus and method for controlling variable optical attenuator
Case assembly for portable device
Attachment hardware
  Randomly Featured Patents
Welding electrode dispenser
Vise transport for milling machines
Animal health care, well-being and nutrition
Short circuit detection method and apparatus and motor drive incorporating same
Fluorescent composition
Boot bolo
Telephone lock
Electronic device with key switch
Method of making a composite urethane foam and concrete construction panel
Wheel lock detection arrangement for multiple-axle railway vehicles