Hydraulic and earth engineering – Foundation – Columnar structure
Reexamination Certificate
2006-07-25
2006-07-25
Lagman, Frederick L. (Department: 3673)
Hydraulic and earth engineering
Foundation
Columnar structure
C173S162100, C173S210000
Reexamination Certificate
active
07080958
ABSTRACT:
A method and apparatus for driving and extracting piles that includes a vibration/tension load absorber assembly mounted between a housing and the vibratory unit which includes shear-type vibration absorbers connected between the housing and the vibratory unit and operating in combination with at least one compression-type vibration absorber positioned to be compressed between first and second compression plates when the tension load reaches a predetermined level.
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Specification sheet, Model 416L,Hydraulic Vibratory Driver/Extractor, International Construction Equipment, Inc., Matthews, NC 28104, www.iceusa.com.
International Construction Equipment, Inc.
Kennedy Covington Lobdell & Hickman LLP
Lagman Frederick L.
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