US PATENT SUBCLASS 411 / 171
.~.~ Bolt or nut adapted to be fused directly to substructure (e.g., weld 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}
166  DF  .~ Design of fastener or substructure restricts rotation (e.g., flattened head rotatable in receiving slot, depression in substructure, bolt clipped to substructure) {5}
171.~.~ Bolt or nut adapted to be fused directly to substructure (e.g., weld nut)

DEFINITION

Classification: 411/171

Bolt or nut adapted to be fused directly to substructure (e.g., weld nut):

(under subclass 166) Device wherein a bolt or nut is so formed or shaped (e.g., with one or more flanges, projections, etc.) or otherwise adapted to be united by fusion, without the benefit of additional material, to a substructure, the weld involving a mutual melting and flowing together of a portion of the material of the bolt or nut and a portion of the material of the substructure.

(1) Note. The art of this subclass may claim only the subcombination of the bolt or nut.

(2) Note. Prominent in the art of this subclass is a "weld nut" which is, most commonly, a metallic nut having one or more projections (e.g., lugs) which are intended to be fused (e.g., by spot welding) to the substructure to unite the nut therewith.

SEE OR SEARCH THIS CLASS, SUBCLASS:

82, for a threaded fastener (i.e., a bolt or nut) and means for restricting the rotation thereof relative to a coacting substructure and wherein there is provided additional material which has a settable state; included therein is the fusible joining of a bolt or nut to a substructure if additional material (e.g., weld rod, chemical solvent) is utilized in doing so.

257, and 258, each as explained in the reference thereto appearing in subclass 82 above.