US PATENT SUBCLASS 294 / 86.22
.~.~.~ Screw-threaded

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}
86.17  DF  .~.~ With releasing means {4}
86.22.~.~.~ Screw-threaded

DEFINITION

Classification: 294/86.22

(under subclass 86.17) Grapples having screw threaded means between the grappling means and the grapple body which moves the grappling means to an object released position.