US PATENT SUBCLASS 254 / 30
.~ Lifter

Current as of: June, 1999
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254 /   HD   IMPLEMENTS OR APPARATUS FOR APPLYING PUSHING OR PULLING FORCE

29 R  DF  PIPE OR ROD JACK {2}
30.~ Lifter {1}
31  DF  .~.~> Reciprocating clutch

DEFINITION

Classification: 254/30

Lifter:

(under subclass 29) Jack for raising pipes, rods, piles, and the like.

(1) Note. Jacks of more general application but provided with grapples for pulling stumps or the like are classified under the structural subclasses elsewhere in this class.

SEE OR SEARCH THIS CLASS, SUBCLASS:

18+, for nail extractors.