Hydraulic and earth engineering – Foundation – Columnar structure
Reexamination Certificate
2008-02-22
2009-10-20
Lagman, Frederick L (Department: 3672)
Hydraulic and earth engineering
Foundation
Columnar structure
C405S232000
Reexamination Certificate
active
07604437
ABSTRACT:
A system and method for installing aggregate piers is provided. A cylindrical hollow mandrel is driven to a desired depth. Aggregate is fed through the mandrel in steps. The mandrel is raised and driven to tamp the aggregate. Physical members in a tamping head of the mandrel allow aggregate to remain in a cavity formed by the mandrel, and prevent aggregate from entering the mandrel during driving.
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PCT International Search Report and Written Opinion for PCT/US2008/054752 dated Jul. 9, 2008.
Metcalfe Brian C.
Wissmann Kord J.
Geopier Foundation Company, Inc.
Lagman Frederick L
Ward and Smith P.A.
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