US PATENT SUBCLASS 294 / 86.31
.~.~.~.~ Inwardly biased grappling means

Current as of: June, 1999
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294 /   HD   HANDLING: HAND AND HOIST-LINE IMPLEMENTS

86.4  DF  GRAPPLE {18}
86.1  DF  .~ Well type {10}
86.26  DF  .~.~ Contracting grappling means (e.g., overshot) {6}
86.3  DF  .~.~.~ Cammed grappling means {1}
86.31.~.~.~.~ Inwardly biased grappling means

DEFINITION

Classification: 294/86.31

(under subclass 86.3) Grapples wherein the grappling means is biased toward its engaged position.