US PATENT SUBCLASS 411 / 163
.~.~.~.~ Variations are teeth located along a periphery

Current as of: June, 1999
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411 /   HD   EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR LOCKED-THREADED FASTENER

81  DF  THREADED FASTENER LOCKED TO A DISCREET STRUCTURE (E.G., PLATE, RAIL, WHEEL) {13}
132  DF  .~ Lock washer-type member located between substructure and bolt head or nut {8}
147  DF  .~.~ Member comprises washer formed as closed loop or apertured plate or as split ring {8}
160  DF  .~.~.~ Closed loop having plural variations in the profile of a contact surface or a peripheral edge thereof {3}
163.~.~.~.~ Variations are teeth located along a periphery {2}
164  DF  .~.~.~.~.~> Both peripheries
165  DF  .~.~.~.~.~> Each twisted about its radial axis

DEFINITION

Classification: 411/163

Variations are teeth located along a periphery:

(under subclass 160) Device wherein the pattern of recurring changes in the figure's dimension in an axial direction is formed by a plurality of toothlike projections positioned at, in or on one or both of the peripheries of the figure.

(1) Note. The teeth frequently owe the bulk of their axial dimension to being turned or twisted, each about its base.