US PATENT SUBCLASS 411 / 222
.~.~ Internally threaded locking member (e.g., jam nut)

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

190  DF  HAVING STRUCTURE TO RESTRICT ROTATION OF THREADED, MATING PIECES (E.G., NUT LOCK) {13}
204  DF  .~ Structure is coaxial, distinct member (e.g., washer, key, or nut portion) that restricts nut piece {7}
222.~.~ Internally threaded locking member (e.g., jam nut) {1}
223  DF  .~.~.~> Including means associated with at least one of the nuts for restricting rotation therebetween {11}

DEFINITION

Classification: 411/222

Internally threaded locking member (e.g., jam nut):

(under subclass 204) Device wherein at least one of the distinct members comprises a second internally threaded element which is in threaded engagement with the externally threaded element and is located axially outwardly, at least in part, of the first (i.e., the primary) internally threaded element.

(1) Note. While the thread gripping locking members of subclasses 246+ below sometimes engage the thread of the externally threaded element in a manner similar to that of the member of this and the indented subclasses, the engagement there (246+) should be, at a maximum, somewhat less that 360< deg.