US PATENT SUBCLASS 166 / 137
.~.~.~ Spring moves anchor slip relative to wedge or cam

Current as of: June, 1999
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166 /   HD   WELLS

179  DF  PACKERS OR PLUGS {17}
118  DF  .~ With expanding anchor {12}
136  DF  .~.~ Spring set anchor {1}
137.~.~.~ Spring moves anchor slip relative to wedge or cam

DEFINITION

Classification: 166/137

(under subclass 136) Devices in which the spring causes relative movement between a wedge or cam and the expanding anchor means to move the means outwardly.