US PATENT SUBCLASS 411 / 165
.~.~.~.~.~ Each twisted about its radial axis

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  DF  .~.~.~.~ Variations are teeth located along a periphery {2}
165.~.~.~.~.~ Each twisted about its radial axis

DEFINITION

Classification: 411/165

Each twisted about its radial axis:

(under subclass 163) Device wherein the toothlike projections either are located along the outer periphery of the figure and extend radially away therefrom or are located along the inner periphery and extend toward the figure's longitudinal axis therefrom, and, in either instance, the toothlike projections each follow generally the path of a radian and are each given a twist about the axis of such a radian.