US PATENT SUBCLASS 166 / 333.1
.~.~ Contact with bore bottom

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

Internet Version by PATENTEC © 1999      Terms of Use


166 /   HD   WELLS

316  DF  VALVES, CLOSURES OR CHANGEABLE RESTRICTORS {5}
332.1  DF  .~ Longitudinally movable operator {8}
333.1.~.~ Contact with bore bottom

DEFINITION

Classification: 166/333.1

Contact with bore bottom:

(under subclass 332.1) Longitudinally movable operator valve comprising means which operate the flow regulating device upon impact with the deepest point in the well.