This class is the locus for the following types of fastenerswhen they are adapted for general use and are not sufficiently limitedto use with special articles or structures as to require classificationtherewith:
A. An anchoring-type or holding-type fastener which expandsupon receiving a driven fastener or when driven by a tool;
B. A tool driven externally threaded fastener (e.g., bolt, screw);
C. A tool driven internally threaded fastener (e.g., nut);
D. An impact driven fastener (e.g., nail, staple);
E. A tool driven or discrete (i.e., not affixed to workpiece),headed, elongated-shank fastener adapted to be moved along its longitudinalaxis into coaxial apertures in a workpiece, wherein the headed,elongated-shank fastener is secured by either (1) a deformable end(e.g., rivet), (2) means other than threads requiring rotation forengagement (e.g., Dzus-type or quarter-turn fastener), (3) pivotablesecuring means (e.g., toggle bolt), (4) retractable securing means(e.g., ball detent fastener), or (5) a separate retaining element;and
F. A tool deformed or tool driven fastener (e.g., cotter pin)which is closely allied in use with the other fasteners of thisclass.
This class is also the locus for a threaded bolt (i.e., externallythreaded fastener) or a threaded nut (i.e., internally threadedfastener), either singly or interthreaded with one another, whichbolt or nut, or a mating pair thereof, is not free to turn aboutthe axis of its thread (i.e., its longitudinal axis), by virtueof being (A) combined with means which restrict its rotation relative toa coating structure, or (B) combined with means which prevent itsrotation relative to its complementary nut or bolt, respectively,or (C) combined with means which both restruct its rotation as in(A) and prevent its rotation as in (B). The bolt and the nut, eithersingle or together, are associated with a fastening function. This classalso provides for devices (e.g., washers) which are used in conjunctionwith fasteners of this class and which perfects the fastening operationthereof.
This class additionally provides for those subcombinations(e.g., fastener heads) of its subject matter for which no otherlocus exists.