Hydraulic and earth engineering – Foundation – Columnar structure
Reexamination Certificate
2005-02-09
2009-11-10
Mayo-Pinnock, Tara (Department: 3671)
Hydraulic and earth engineering
Foundation
Columnar structure
C052S632000, C114S044000, C405S218000
Reexamination Certificate
active
07614829
ABSTRACT:
The extendible building post includes a telescoping hydraulic cylinder integrated within a construction member externally configured and dimensioned essentially identically to a conventional building construction member, e.g., a four-by-four or six-by-six length of lumber, or alternatively a plastic column. The hydraulic system may be formed of stock plastic pipe and fittings, and may use water as the working fluid. The device may include insulation and a heating system to prevent freezing when used in such an environment, with certain types of insulation also providing additional rigidity for the hydraulic assembly.
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Website “uh.edu/engines/epi279.htm,” “Engines of our Ingenuity No. 279, Hydraulic Lifts” by John H. Lienhard, printed Sep. 2, 2004.
Website “home-elevator.net/products/vision/500ec.htm,” “Nationwide Lifts,” printed Sep. 2, 2004.
Litman Richard C.
Mayo-Pinnock Tara
LandOfFree
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