US PATENT SUBCLASS 405 / 278
.~.~.~.~ Head and claw interlock

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

258  DF  EARTH TREATMENT OR CONTROL {5}
272  DF  .~ Shoring, bracing, or cave-in prevention {6}
274  DF  .~.~ Sheet piles {2}
276  DF  .~.~.~ Metal {5}
278.~.~.~.~ Head and claw interlock

DEFINITION

Classification: 405/278

Head and claw interlock:

(under subclass 276) Method or apparatus wherein the elongated members have on each edge an enlarged "head" and a protruding "claw", as viewed in cross section, the "head" of each edge adapted to slip between the "head" and "claw" of the edge of the next member of the series.