US PATENT SUBCLASS 405 / 247
.~.~.~.~.~ Fluid pressure actuated

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


405 /   HD   HYDRAULIC AND EARTH ENGINEERING

229  DF  FOUNDATION {2}
231  DF  .~ Columnar structure (e.g., pier, pile) {7}
232  DF  .~.~ Process or apparatus for installing {5}
245  DF  .~.~.~ Driving removable wall supporting core {1}
246  DF  .~.~.~.~ Diametrically retractable core {1}
247.~.~.~.~.~ Fluid pressure actuated

DEFINITION

Classification: 405/247

Fluid pressure actuated:

(under subclass 246) Method or apparatus wherein a liquid or gas under pressure is employed to change the diameter of the core.