US PATENT SUBCLASS 411 / 184
.~.~.~ Region on inwardly facing surface of bolt head or nut

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}
172  DF  .~ Nut having a portion for attachment to substructure {2}
176  DF  .~.~ Fastener having a deformable portion or deforms substructure (e.g., prong) {3}
184.~.~.~ Region on inwardly facing surface of bolt head or nut {3}
185  DF  .~.~.~.~> Surface extends radially beyond flat sides of bolt head or nut {1}
187  DF  .~.~.~.~> Having axially directed projection or recess {1}
189  DF  .~.~.~.~> Surface deforms resiliently

DEFINITION

Classification: 411/184

Region on inwardly facing surface of bolt head or nut:

(under subclass 176) Device wherein the deformable/deformation-producing region of either a bolt head or a nut occupies either a portion of or all of that surface

thereof which confronts the substructure.