US PATENT SUBCLASS 411 / 153
.~.~.~.~ Overlap of at least 180 degrees (e.g., coil)

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}
152  DF  .~.~.~ Ends of split ring overlap in stressed condition {1}
153.~.~.~.~ Overlap of at least 180 degrees (e.g., coil)

DEFINITION

Classification: 411/153

Overlap of at least 180 degrees (e.g., coil):

(under subclass 152) Device wherein the distinct ends of the figure, having passed beyond one another, continue along paths in which they are axially superposed until they have traversed a total path or about 540 deg. or more.

SEE OR SEARCH THIS CLASS, SUBCLASS:

147, for an open-center figure in the nature of a spiral, or a volute, spring.