US PATENT SUBCLASS 411 / 554
.~.~.~ Helically slotted securing means having cooperating engaging portion on socket member

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

337  DF  HEADED FASTENER ELEMENT WITH NUT, WASHER, SECURING MEANS OR CAP {12}
347  DF  .~ Headed fastener element with securing means and biasing spring {2}
349  DF  .~.~ Securing means rotatable about fastener element or rotatably engageable by tool-rotatable headed fastener element {3}
554.~.~.~ Helically slotted securing means having cooperating engaging portion on socket member {1}
555  DF  .~.~.~.~> Through-slot for engagement with crossbar

DEFINITION

Classification: 411/554

Helically slotted securing means having cooperating engaging portion on socket member:

(under subclass 349) Subject matter wherein the securing means comprises an arcuate recess in the headed elongated fastening means shank which is generally spirally oriented about the axis thereof and wherein a mating to cooperate with the recess.