US PATENT SUBCLASS 242 / 573.6
.~.~.~.~.~.~.~ Reverse thread helices

Current as of: June, 1999
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242 /   HD   WINDING, TENSIONING, OR GUIDING

570  DF  COIL HOLDER OR SUPPORT (E.G., SPINDLE, DISPENSER, OR SPOOL) {6}
571  DF  .~ Radially expansible or contractile {8}
572  DF  .~.~ Longitudinally shiftable operator {2}
573  DF  .~.~.~ Cam and follower {3}
573.2  DF  .~.~.~.~ Longitudinally spaced cams {3}
573.3  DF  .~.~.~.~.~ Opposed {2}
573.5  DF  .~.~.~.~.~.~ Threaded operator {1}
573.6.~.~.~.~.~.~.~ Reverse thread helices

DEFINITION

Classification: 242/573.6

Reverse thread helices:

(under subclass 573.5) Subject matter wherein the spiral land includes segments of reverse pitch (i.e., right and left hand threads).