US PATENT SUBCLASS 254 / 98
SCREW

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

98SCREW {4}
99  DF  .~> Derrick type
100  DF  .~> Special engaging feature {1}
102  DF  .~> Telescoping screws
103  DF  .~> Geared

DEFINITION

Classification: 254/98

SCREW:

(under the class definition) Pushing and pulling implement comprising an extensible screw member for operating upon the load.

SEE OR SEARCH THIS CLASS, SUBCLASS:

7, 85, 92, 204, and 231+, for implements or apparatus including screw drive.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism,

424.7, and 424.8 for the gearing, per se.

248, Supports, 404+, and 422 for screw members operating to vertically adjust a stand or stool.