US PATENT SUBCLASS 405 / 297
.~.~.~.~.~ With contour following feature

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

258  DF  EARTH TREATMENT OR CONTROL {5}
272  DF  .~ Shoring, bracing, or cave-in prevention {6}
288  DF  .~.~ Roof support {5}
290  DF  .~.~.~ Jack {1}
291  DF  .~.~.~.~ Mobile {8}
297.~.~.~.~.~ With contour following feature

DEFINITION

Classification: 405/297

With contour following feature:

(under subclass 291) Method or apparatus wherein the prop includes means permitting the base or roof supporting section to follow irregularities in the surface of the floor or roof as the prop is advanced.