US PATENT SUBCLASS 411 / 101
.~ Locked by a piece abutting inwardly facing surfaces of a plurality of nuts or bolt heads

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}
101.~ Locked by a piece abutting inwardly facing surfaces of a plurality of nuts or bolt heads

DEFINITION

Classification: 411/101

Locked by a piece abutting inwardly facing surfaces of a plurality of nuts or bolt heads:

(under subclass 81) Device wherein the other element, or at least one of a plurality thereof, comprises a member formed either of a single piece of material or a plurality of pieces so related to one another as to function as a single piece, which piece or pieces are positioned in such a manner that one principal surface thereof occupies a plane which generally parallels an outwardly facing surface of the substructure and wherein the opposite principal surface of the piece or pieces contains regions which engage against rotation, in at least one direction, the inwardly facing surfaces of two or more bolt heads or nuts.

(1) Note. The engagement for restricting rotation may involve only frictional contact.

(2) Note. Occasionally, the regions of the member and the inwardly facing surfaces of the bolt heads or nuts are provided with formations which are complementary to one

another, and, in some instances, the formations are of the kind which resist rotation to a greater degree in one direction of turning than in the other.

(3) Note. In some instances, the member engages an element which underlies the inwardly facing surface of a bolt head or a nut and thus intervenes between the member and the surface.