US PATENT SUBCLASS 100 / 290
.~.~.~ Plural screws

Current as of: June, 1999
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100 /   HD   PRESSES

214  DF  RECIPROCATING PRESS CONSTRUCTION {26}
280  DF  .~ With mechanical force multiplier {6}
289  DF  .~.~ Screw and nut {1}
290.~.~.~ Plural screws

DEFINITION

Classification: 100/290

(under subclass 289) Apparatus having plural pairs of internally screw threaded members and externally screw threaded shafts for moving the same movable pressure surface.