US PATENT SUBCLASS 411 / 402
.~ Head driving structure

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

378  DF  EXTERNALLY THREADED FASTENER ELEMENT, E.G., BOLT, SCREW, ETC. {16}
402.~ Head driving structure {4}
403  DF  .~.~> Socket or slot {4}
408  DF  .~.~> Frictional engagement
409  DF  .~.~> Wing structure
410  DF  .~.~> Plural diverse driving structures

DEFINITION

Classification: 411/402

Head driving structure:

(under subclass 378) Subject matter wherein the fastening means is provided with a transverse projection, i.e., a head, which is further provided with head driving structure adapted to receive an impelling tool used to secure the fastening means and further wherein significance is attributed to the means to receive the tool.