US PATENT SUBCLASS 166 / 214
.~ Spring set

Current as of: June, 1999
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166 /   HD   WELLS

206  DF  EXPANSIBLE ANCHOR OR CASING {8}
214.~ Spring set {1}
215  DF  .~.~> Spring moves anchor slip relative to wedge or cam

DEFINITION

Classification: 166/214

(under subclass 206) Devices in which the energy stored in a spring is used to move the movable means outwardly to anchor the device in the conduit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

136, for spring set expansible anchors combined with packers or plugs.