US PATENT SUBCLASS 411 / 160
.~.~.~ Closed loop having plural variations in the profile of a contact surface or a peripheral edge thereof

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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.~.~.~ Closed loop having plural variations in the profile of a contact surface or a peripheral edge thereof {3}
161  DF  .~.~.~.~> Variations comprise generally radially extending ridges or grooves
162  DF  .~.~.~.~> Variations comprise circumferentially spaced projections or recesses inset from both peripheries
163  DF  .~.~.~.~> Variations are teeth located along a periphery {2}

DEFINITION

Classification: 411/160

Closed loop having plural variations in the profile of a contact surface or a peripheral edge thereof:

(under subclass 147) Device wherein the open-center figure is a closed one of a more or less circular nature and has regions (e.g., contact surfaces) which face generally oppositely and which have a radial extent determined by the inner periphery and the outer periphery of the figure, and wherein at least one region, or at least one periphery, is formed with a pattern of recurring changes in the figure's dimension in an axial direction (i.e., its effective thickness).