US PATENT SUBCLASS 405 / 272
.~ Shoring, bracing, or cave-in prevention

Current as of: June, 1999
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405 /   HD   HYDRAULIC AND EARTH ENGINEERING

258  DF  EARTH TREATMENT OR CONTROL {5}
272.~ Shoring, bracing, or cave-in prevention {6}
273  DF  .~.~> Cribbing
274  DF  .~.~> Sheet piles {2}
282  DF  .~.~> Trench shoring {1}
284  DF  .~.~> Retaining wall {2}
287.1  DF  .~.~> Cast in situ
288  DF  .~.~> Roof support {5}

DEFINITION

Classification: 405/272

Shoring, bracing, or cave-in prevention:

(under subclass 258) Method or apparatus concerning prevention of earth movement by means of an external

structural support.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8+, for a pressurized caisson.

132+, for a shoring method or apparatus combined with a step or means forming an underground passageway (e.g., tunnel) especially 133, for a caisson or other shoring means which remains in the earth as part of a finished shaft or which includes shaft excavating means.

333, for subject matter relating to a caisson which remains with a finished foundation.