US PATENT SUBCLASS 294 / 90
.~ Collar-engaging

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

86.4  DF  GRAPPLE {18}
90.~ Collar-engaging {1}
91  DF  .~.~> Rigid yoke

DEFINITION

Classification: 294/90

(under subclass 86.4) Grapples designed to engage shoulders on rods, pipes, or similar objects or shoulders on coupling members thereof and usually having no gripping action on the pipe.

SEE OR SEARCH THIS CLASS, SUBCLASS:

86.33, for shoulder or collar engaging grapples peculiarly adapted to function within a well bore.

87.28+, for similar grapples adapted to seize a plurality of articles.