(under subclass 216) Device including relatively rotatable bodies (other than screw-nut members) provided with teeth or frictional interengaging elements whereby one rotatable body will impart motion to, or receive motion from, some other body by rolling contact, which motion directly, or as part of a mechanism train, effect relative jaw motion.
(1) Note. Screw-nut gearing is characterized by the fact that the relative rotation and relative axial movement, between screw and nut, is about and along, a common axis. While screw-nut means are a species of gearing, patents for a holder including a screw-nut means in the jaw actuating train are placed in subclasses 240+ below, e.g., a patent for a holder including the combination of a gear driven screw-nut actuating means is placed in subclasses 240+.
SEE OR SEARCH THIS CLASS, SUBCLASS:
222, for patents to a holder with plural intergeared screw-nut type actuating means.
SEE OR SEARCH CLASS
74, Machine Element or Mechanism,
640+, for patents for gearing means, per se, and see search notes thereunder.
