US PATENT SUBCLASS 411 / 166
.~ Design of fastener or substructure restricts rotation (e.g., flattened head rotatable in receiving slot, depression in substructure, bolt clipped to substructure)

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.~ Design of fastener or substructure restricts rotation (e.g., flattened head rotatable in receiving slot, depression in substructure, bolt clipped to substructure) {5}
167  DF  .~.~> Locknut type on fastener
168  DF  .~.~> Including a lock thread
169  DF  .~.~> Mass of bolt head or nut offset from fastener longitudinal axis
170  DF  .~.~> Nut and washer type formed from single blank folded over substructure
171  DF  .~.~> Bolt or nut adapted to be fused directly to substructure (e.g., weld nut)

DEFINITION

Classification: 411/166

Design of fastener or substructure restricts rotation:

(under subclass 81) Device wherein the means for either preventing or limiting turning of a specific bolt or nut relative to its substructure resides in one or more structural characteristics (e.g., configuration, composition, etc.) of one or another of the bolt, or the nut, or the substructure.

(1) Note. If the structural characteristic of at least one of the cooperating members (bolt, nut or substructure) is something more than a flat (i.e., a bearing) surface, classification is here; however, if both of any two cooperating members afford no more than surfaces of a planar nature, and those surfaces are parallel to one other, classification is elsewhere (e.g., below, as an externally, or internally, threaded fastener, per se.)

SEE OR SEARCH THIS CLASS, SUBCLASS:

81, for a collection of art wherein the means for preventing

or limiting turning resides in a structural characteristic of a bolt, nut or substructure, as is provided for in this area (166+), but wherein a plurality of bolts and nuts are involved.

83+, for a threaded bolt or nut and means for restricting the rotation of one or both relative to a coacting substructure and wherein the means comprises at least one element which is in addition to the bolt, nut, or substructure and also is (a) movable relative to the bolt, nut or substructure or (b) separable therefrom or (c) connected without distortion thereto.

190+, for a threaded bolt and nut and means for coupling them against relative rotation. It is appropriate to observe here that, while the instances of coupling (a) a bolt and a nut to a substructure, or (b) a nut to a substructure, clearly are provided for in this area (166+) and would not get to that area (190+), the instance of coupling (c) a bolt to a substructure sometimes presents a less straightforward proposition, because the "substructure" may have some attributes of a static structure (for 166+), but may also, in other respects, appear to act very much in the nature of a nut (for 190+); accordingly, when a situation of that kind arises, consideration should be given to placing copies of the patent in both areas (166+ and 190+).