PTO Manual of Classification for US patents

PTO Manual of Classification for US patents

What follows are the subclasses from one class of the Manual of Classification for US patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retrieve patent titles by entering the class/subclass in the box below.


Enter a class/subclass code here to get a list of patent titles. Use any of the following forms:
363-131 121-55A 14-.5
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Class Number: 411
 Class Title: EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR
              LOCKED-THREADED FASTENER

Subclass  Subclass
Number    Title

  1       TORQUE RESPONSIVE NUT OR BOLT DRIVING CONNECTION
  2       .Frangible connection
  3       ..Between concentric elements
  4       ...Shear pin connecting means
  5       ...Axially displaced
  6       .Resilient connection
  7       ..Ratchet
  8       WITH MEANS TO INDICATE APPLICATION OF PREDETERMINED
           STRESS-STRAIN
  9       .Axially deformable member or portion
  10      ..Deformable washer
  11      ...Resilient
  12      ....Coil spring
  13      .Color indicator
  14      .Including gauge means
  15      HAVING SEPARATE EXPANDER MEANS
  16      .Helical anchor
  17      ..Mates with mandrel thread
  18      ..With wedge-shaped expander
  19      .Fluent pressure actuated
  20      ..Explosive
  21      .Having securing element projecting through aperture in sleeve
  22      ..Deformable element
  23      ...Flowable mass
  24      .Oppositely acting double wedge expander means
  25      ..Outwardly moving
  26      ..Both wedges provided with thread cooperating means
  27      ..Having rotation preventing means
  28      ...Groove and follower
  29      .With hole forming means
  30      ..Formed on expansible sleeve
  31      ...Serrated end
  32      .Plural expansible segments or sections
  33      ..Identical segments
  34      .Bulged by axially contracting ends
  35      ..Having wedge-shaped section acting in slot
  36      ..Twistable sleeve
  37      ..Bulged portion having additional gripping means
  38      ..Bulged portion including bend line or reduced section
  39      .Frangible member
  40      ..Frangibly connected expander
  41      ...Projecting outwardly from head
  42      ..Sleeve including weakened portion
  43      ..Frangible mandrel
  44      .Including sleeve and tapered expander
  45      ..And means to captively retain expander
  46      ...Follower captive within groove
  47      ...Bridge-type retainer
  48      ...Tongue-type retainer
  49      ..Relative rotation preventing means
  50      ...Guide and followerr
  51      ....Splines
  52      ....Follower defined by corners of polygonal element
  53      ....Expander type
  54      ..Expansible element moved relative to stationary expander
  55      ..Expander threadedly engaged by mover
  56      ..Stepped expander
  57      ..Slotted sleeve
  58      ...Both ends slotted
  59      ...Slot spaced from ends
  60      ...Throughout longitudinal extent of sleeve
  61      ....Folded blank type
  62      ....Slot angularly related to sleeve axis
  63      ..Plural-sectioned sleeve
  64      ...Having section retainer
  65      ....Ring or sleeve type
  66      .....Destructible
  67      ....Bight type
  68      ....Tongue and groove
  69      ..Expander or sleeve extruded during expansion
  70      ..Expander having integral pull stem
  71      ..Sleeve having external gripping means
  72      ...Circumferential rib
  73      ....And longitudinal rib
  74      ...Struck from sleeve
  75      .Relatively sliding wedge surfaces
  76      ..Wedge received in transverse slot in holding device or anchor
  77      ...Double-faced wedge
  78      ..Having wedge retainer means
  79      ..Wedge surfaces act in single lateral direction
  80      ..Including discrete activating means for wedge
  81      THREADED FASTENER AND MEANS FOR RESTRICTING ROTATION THEREOF
           RELATIVE TO COACTING SUBSTRUCTURE
  82      .Including settable material
  83      .Including movable, separable, or nondistortably connected
            restricting member
  84      ..Prefabricated assembly comprising strip or sheet member
             carrying plural, similar fasteners
  85      ...Including element for holding fasteners against separation
              from member
  86      ..Including a series of elements, one element restricting two
             fasteners of a plurality, and the remainder each restricting
             one fastener
  87      ..Elongate member extending between and interlocking plural
             bolts or nuts
  88      ...Member engages inwardly facing surface and a flat side of
              bolt head or nut
  89      ..Member extending between plural fasteners and restricting the
             rotation thereof in one direction more than the other (e.g.,
             pawl and ratchet)
  90      ..Member extending between and engaging flat formed on side of
             each of a plurality of bolts or nuts (e.g., side lock)
  91      ...And element on opposite face of substructure restricting
              rotation of a cooperating nut or bolt
  92      ...Having plural openings or notches engaging a bolt or nut on
              two sides
  93      ....Having plural parts, one of which engages the inwardly
               facing surface of a bolt head or nut
  94      .....Special fishplate engaging inwardly facing surfacee
  95      .....Elastically or plastically deformable part
  96      ....Having plural parts, one comprising a keeper
  97      ....Unitary member, deformable in whole or in part
  98      ...And engaging the inwardly facing surface of the bolt heads or
              nuts
  99      ...Including separable keeper for member
  100     ...Including element spacing member from substructure
  101     ..Member engages the inwardly facing surface of a plurality of
             bolt heads or nuts
  102     ..Series of elements, each restricting a single fastener,
             cooperating to restrict a series of fasteners
  103     ..Member preassembled with substructure at through-passage or
             recess for holding single bolt or nut in coaxial relation
             therewith
  104     ...Through-passage or recess having laterally extending entry
              for inserting member and nut
  105     ...And a second substructure and means for capturing a
              complementary nut or bolt thereto
  106     ...Having means for coupling a bolt to a nut (e.g., thread
              lock)
  107     ...Member anchors bolt in substructure with threaded portion
              exposed (e.g., stud bolt)
  108     ...Nut-encompassing sleeve member engaged within through-passage
              or recess
  109     ...Locking ring coaxially related to an elongated, externally
              threaded nut
  110     ...Member comprises a longitudinal key
  111     ...Member includes elastically or plastically deformable
              portion
  112     ....Having elastically deformable portion for attaching member
               to substructure
  113     ....Plastically deformable portion
  114     ..Recessed or toothed member receiving movable pawl carried by
             bolt head or nut
  115     ...Having discrete, reciprocably movable pawl
  116     ..Fastener, or coaxial adjunct therefor, having sidewardly
             facing flat or formation engaged by portion of member (e.g.,
             side lock)
  117     ...Adjunct carried flat or formaton
  118     ...And thread lock coupling complementary fasteners
  119     ...Member having opening or notch engaging a bolt head or nut on
              two sides
  120     ....And element maintaining member in operative engagement with
               bolt head or nut
  121     ....Member elastically or plastically deformable for attaching
               it to bolt head or nut
  122     ...Member having portion (e.g., tab) deformable in situ into
              engagement with flat or formation
  123     ....And having specific structure to coact with substructure
  124     .....Projection on member and coacting formation in
                substructure
  125     ...Sheet metal member having resilient pawl distorted therefrom
  126     ....Member includes means which attempt to penetrate
               substructure
  127     ....Member abuts coacting part on substructure
  128     ...Member, or portion thereof, comprises movable pawl
  129     ...Member engages inwardly facing surface of bolt head or nut
  130     ....And is formed from plural, cooperating partss
  131     ....And has specific structure to coact with substructure
  132     ..Member or portion thereof located between substructure and
             inwardly facing surface of bolt head or nut
  133     ...Member fixed to bolt shank, and member or bolt fixed to
              substructure
  134     ...Means holding member to bolt, nut or substructure prior to
              use
  135     ....By discrete element
  136     ...Member comprises looplike element (e.g., washer) interlocked
              with additional element, one of them engaging substructure or
              surface in other than planar, face to face contact
  137     ....Two looplike elements interlocked by laterally introduced
               key
  138     ....Pawl element, movably carried by looplike element, coacts
               with ratchet on surface
  139     ....Laterally introduced key locks looplike element to surface
  140     ...Elongate member moves in longitudinally extending opening in
              bolt head or nut to enter substructure
  141     ...Locking dog or pawl carried by bolt head or nut and engaging
              substructure
  142     ...Key introduced laterally at juncture of surface and
              substructure
  143     ...Formations on either member or surface, and cooperative,
              restricting means on the other
  144     ....Formations on surface, means on member, one of which
               presents a sharp edged configuration
  145     .....Formations comprise ramplike teeth, means comprises a
                movable pawl
  146     ......And substructure accommodation for member portion
  147     ...Member comprises washer formed as closed loop or apertured
              plate or as split ring
  148     ....Engaging side wall of counterbore in substructure
  149     ....Plural, axially adjacent washers, or plural part washer
  150     .....Having one washer, or washer part, of a more yieldable
                nature than another washer, or part
  151     ....Split ring having radially outwardly extending end
  152     ....Ends of split ring overlap in stressed condition
  153     .....Overlap of at least 180 degrees (e.g., coil)
  154     ....Apertured plate of uniform thickness having undulating
               contact surfaces
  155     ....Apertured plate having arched sectional configuration (e.g.,
               concavo convex)
  156     .....Arched configuration circumscribes aperture
  157     ....Split ring having opposed ends offset axially
  158     .....Contact surface contains a plurality of generally radially
                extending ridges or grooves removed from the ends
  159     .....Cross section other than rectangular
  160     ....Closed loop having plural variations in the profile of a
               contact surface or a peripheral edge thereof
  161     .....Variations comprise generally radially extending ridges or
                grooves
  162     .....Variations comprise circumferentially spaced projections or
                recesses inset from both peripheries
  163     .....Variations are teeth located along a periphery
  164     ......Both peripheries
  165     ......Each twisted about its radial axis
  166     .Restricting means comprises structure of fastener or
            substructuree
  167     ..And bolt to nut thread lock
  168     ..By or including bolt to substructure thread lock
  169     ..Mass of bolt head or nut offset radially to resist loosening
  170     ..Nut and apertured spacer formed in single strip of material
             and folded into axial alignment
  171     ..Bolt or nut adapted to be fused directly to substructure
             (e.g., weld nut)
  172     ..Nut, and means to engage substructure on its opposite faces
             for retaining nut at aperture therein, formed as unitary
             component
  173     ...Means to engage extends through aperture
  174     ...Means to engage grasps an edge of substructure
  175     ....And has projection contacting periphery of aperture
  176     ..Structure includes region which is deformable or produces
             deformation or both
  177     ...Nut assembled to substructure utilizing cooperating regions
              on both
  178     ....Nut is externally and internally threaded cylinder
  179     ....Nut penetrates substructure and anchors itself thereto
               (e.g., pierce nut)
  180     ....Nut deforms wall of preformed opening in substructure during
               assembly
  181     ....Both cooperating regions deformed
  182     ....Nonmetallic nut, resiliently deformed during assembly
  183     ...Nut assembled to substructure by plastically deformable
              region on nut
  184     ...Region on inwardly facing surface of bolt head or nut
  185     ....Surface extends radially beyond flat sides of bolt head or
               nut
  186     .....And includes resilient flange
  187     ....Having axially directed projection or recess
  188     .....Plural, radially extending, and generally equally spaced
  189     ....Surface deforms resiliently
  190     THREADED BOLT AND NUT AND MEANS FOR COUPLING THEM AGAINST
           RELATIVE ROTATION
  191     .By locking member contacting side flat on nut or bolt and
            engageable with other fastener element
  192     ..Member also engages side flat on other element
  193     ...Utilizing a resilient characteristic of the member, or of a
              discrete element
  194     ....With a discrete, resilient element
  195     ...Other element is a bolt, and member includes opening
              configured to engage side flat thereon
  196     ....And further includes spaced, axially extending legs for
               engaging side flats on the nut
  197     ..Locking member contacts nut
  198     ...Utilizing a resilient characteristic of the member, or of a
              discrete element
  199     ....Member comprises key movable laterally into engagement with
               threaded elements
  200     ...Member comprises key movable laterally into engagement with
              threaded elements
  201     ...Member includes plastically deformable portion
  202     ..Utilizing a resilient characteristic of the member, or of a
             discrete element
  203     ...With a discrete, resilient element
  204     .By locking member coacting with an axially outwardly facing
            portion of nutt
  205     ..Member comprises key swingable (e.g., pivotal) into engagement
             with threaded elements
  206     ...Utilizing a resilient characteristic of the key, or of a
              discrete element
  207     ....With a discrete, resilient element
  208     .....And key engageable with aligned formations (e.g., grooves)
                in axially outwardly facing portion of each threaded
                element
  209     ..Member comprises key movable laterally into engagement with
             threaded elements
  210     ...Utilizing a resilient characteristic of the key, or of a
              discrete element
  211     ....With a discrete, resilient element
  212     ...Including plastically deformable portion
  213     ....Comprising an elongated element divided longitudinally
               (e.g., a cotter pin)
  214     ..Member comprises a screw, and bolt includes a generally
             axially extending, internally threaded bore for receiving the
             screw
  215     ...With an additional member between screw and axially outwardly
              facing portion
  216     ..And the member including, as a substantial part thereof, an
             elongated, axially disposed key
  217     ...Key coacts with bolt by occupying an axially extending recess
              formed in the radially outward surface thereof
  218     ....And includes a portion adapted to extend into a transverse
               opening provided in the bolt
  219     ....And includes a portion adapted to engage a substantial part
               of the periphery of the bolt
  220     ....And includes a region plastically deformable into engagement
               with the axially outwardly facing portion
  221     ..Member interlocks with an axially extending recess or slot in
             the bolt and a recess in the axially outwardly facing portion
             of the nut
  222     ..Internally threaded locking member (e.g., jam nut)
  223     ...Including means associated with at least one of the nuts for
              restricting rotation therebetween
  224     ....Key received in part in each of the nuts
  225     .....Including a plastically deformable portion
  226     .....Received in axially extending passages or recesses
  227     ....Comprising one or more discrete members serving as a pawl
               and ratchet
  228     .....Inherently resilient pawl
  229     ....Axially directed, resiliently biased detent means
  230     ....Canted element
  231     ....With means resiliently biasing the nuts apart
  232     ....Side lock
  233     .....Integral deformable means
  234     .....By a discrete element
  235     ......Periphery encompassing means (e.g., a sleeve)
  236     ......Including plastic deformation (e.g., bending) of the
                 discrete element
  237     ....Having a part of one of the nuts extending into a circular,
               axially directed recess of the other, and further including,
               in the region of the recess, formations cooperating to
               restrict relative rotation
  238     .....At least one of the formations comprises a surface
                eccentric to the longitudinal axis of the nutss
  239     ....Including cooperating formations on the axially opposing
               portions of the nuts
  240     .....Comprising teeth of the ramp and buttress type
  241     .....Comprising surfaces of a curvilinear nature
  242     ....Plastic deformation of at least one of the nuts
  243     ....Reversed internal and external threads on one of the nuts
  244     ....Oppositely threaded
  245     .....Intersecting threads on the bolt
  246     ..By thread-gripping locking element
  247     ...Resilient grip
  248     ....Split ring
  249     .....Including structure interfitting within a thread for less
                than a full turn thereof
  250     ...Wire structure
  251     ....Helically coiled wire
  252     .....Including a free end in nonrotational engagement with the
                threaded element
  253     ...Gripping member includes a tapered section adapted to be
              axially depressed to cause radial movement of a portion
              thereof
  254     ...Gripping member is moved radially into engagement with the
              threads
  255     ....Including discrete means to move or to lock the gripping
               member relative to the externally threaded element
  256     ...Gripping member is moved tangentially into engagement with
              the threads
  257     .Including material in the nature of (1) a metallic coating, (2)
            a quantity of fusible metal or (3) a discrete member formed of
            ductile metal
  258     .Including settable material
  259     .Comprising a thread lock
  260     ..Including a distortable metallic washer or sleeve
  261     ...In the nature of a dished washer
  262     ..Including a coil spring
  263     ..Differential thread means
  264     ..Rocking thread section on the externally threaded element
  265     ..Including a tapered (e.g., a conical) surface for wedging the
             internally threaded element against the externally threaded
             one
  266     ...Segmented internally threaded element
  267     ....Discrete segments carried within a housing
  268     ....Including a discrete, threaded member carrying the tapered
               surface and threadedly engaging one of the threaded
               elements
  269     .....Engaging a threaded exterior provided on the segmented
                element
  270     ....Including a sleeve or washer type member for carrying the
               tapered surface and surrounding the segmented element
  271     ..Externally threaded element includes an axially extending
             opening in its free end for receiving an expander member
  272     ..Including camming surfaces on the threaded elements or on an
             additional member
  273     ...With a camming member having an eccentrically arranged recess
              for receiving the internally threaded element
  274     ..Having an element, or with a discrete member, adapted to cant
             the assembly
  275     ...With a discrete, canting member (e.g., a washer)
  276     ..Having the internally threaded element distortedd
  277     ...Radially inward distortion
  278     ....With discrete means carried by the element for producing the
               distortion
  279     .....Threaded means
  280     ....Of cantilevered segments (e.g., castellated end)
  281     ....Of circumferentially spaced areas of continuous periphery
  282     .....Defining a smooth curving, noncircular thread section
                (e.g., elliptically shaped)
  283     .....Impacted areas
  284     ......Located on the flats of a polygonally shaped element
  285     ...Axial distortion
  286     ....With discrete means carried by the element for producing the
               distortion
  287     ....By axially directed impacted areas
  288     ....Of axially spaced threaded sections
  289     .....Coiled spring
  290     ....Including a region displaceable generally axially relative
               to another part of the element
  291     .....Having at least one region formed by a cut, slot, etc.,
                across at least one sidewall of the element and extending
                generally radially into the element
  292     ..Including a longitudinal locking member
  293     ...Having a toothed surface
  294     ..Including a radial locking member
  295     ...Threadedly received in the internally threaded element
  296     ..Side clutch
  297     ...Roller
  298     ...Ball
  299     ...Spring
  300     ..Tangential locking member
  301     ..Elastic gripping action
  302     ...Elastic insert
  303     ....Disposed in a counterbore in the internally threaded
               element
  304     ....Disposed within an interruption of a threaded surface
  305     ..Externally threaded element adapted to be compressed radially
             inwardly
  306     ...Resilient element
  307     ..Having threads of different pitch, or a thread of varying
             pitch
  308     ..Involving dissimilarities in the sectional configuration of
             the threads
  309     ...Resulting in the deformation of one thread by the other
  310     ....By integral, interference-producing deviations from a
               standard thread shape
  311     .....Located in the vicinity of the crest or the root of the
                thread
  312     ..Including means biasing the threads in axially opposed
             directions
  313     .Washer having a deformable portion engageable with a threaded
            element
  314     ..Resiliently deformable portion
  315     .With a member in the nature of a rotation preventing key
            movable laterally into engagement with the threaded elements
  316     ..And utilizing a resilient characteristic of the key, or of a
             discrete element
  317     ...With a discrete, resilient element
  318     ....Comprising a spring of the coiled typee
  319     ..And including a plastically deformable portion
  320     ...Comprising an elongated element divided longitudinally (e.g.,
              a cotter pin)
  321     .With an elongated member in the nature of a rotation preventing
            key disposed axially of the threaded elements
  322     ..And utilizing a resilient characteristic of the key, or of a
             discrete element
  323     ..And including a plastically deformable portion
  324     .Elastic gripping action
  325     .Externally threaded element includes an axially extending
            opening in its free end for receiving an expander member
  326     .Pawl and ratchet
  327     ..Pawl carried by the internally threaded element
  328     ...Pivoted pawl
  329     ...Resilient pawl
  330     ..Washer carried pawl
  331     ...Resilient
  332     .Including teeth of the ramp and buttress type on the axially
            inwardly facing portion of the internally threaded element
  333     .By deformation of a threaded element
  334     ..Plastic deformation
  335     ...Of an internally threaded element
  336     ....Into an interruption in the thread of the externally
               threaded element associated therewith
  337     HEADED FASTENER ELEMENT WITH NUT, WASHER, SECURING MEANS OR CAP
  338     .Lap bolt or fastener
  339     ..Interference fit type
  340     .Securing means pivotable about axis transverse to fastener
            axis, e.g., toggle bolt, etc.
  341     ..And biasing spring
  342     ...Spring engaging securing means
  343     ...Spring at opposite end from securing means
  344     ..And discrete manual actuating means
  345     ..And pivoted retention means
  346     ..Channel shaped securing means
  347     .Headed fastener element with securing means and biasing spring
  348     ..Ball detent securing means
  349     ..Securing means rotatable about fastener element or rotatably
             engageable by tool-rotatable headed fastener element
  549     ...Outwardly extending projection cooperates with socket member
              having ramp engagement means
  550     ....Including means providing axial adjustment
  551     .....Threaded adjustment
  552     ....And discrete biasing spring
  553     ....Similar, opposed ramp surfaces
  554     ...Helically slotted securing means having cooperating engaging
              portion on socket member
  555     ....Through-slot for engagement with crossbar
  350     ...Securing means rotatable and axially movable, e.g., wear
              takeup means, etc.
  351     .Draw bar or draft key fastener
  352     .Metallic resilient securing means
  353     ..Retainer ring
  354     .Wedge-securing means
  355     ..And apertured bolt
  356     .Penetrating pin securing means
  357     ..Longitudinally inserted
  358     ...Outwardly deflectedd
  359     ....Bifurcated
  360     .Deformable securing means
  361     ..Swageable collar
  362     ..Securing means deflecting a portion of fastener end
  363     ...Plural end legs
  364     ....Cotter pin fastener
  365     ....Circular deflector
  366     .Threaded fastener and nut
  367     ..Having stay bolt spacer sleeve
  368     ..Having washer
  369     ...Including sealing means
  370     ....Stay bolt bearing washer
  371     .Washer or cap
  372     ..And separate attaching or retaining means
  373     ..Attachable cap structure
  374     ...By screw means
  375     ...Crimpable
  376     ...Weldable metal
  377     ...Moldable
  378     EXTERNALLY THREADED FASTENER ELEMENT, E.G., BOLT, SCREW, ETC.
  379     .Stay bolt
  380     ..Having spherical head
  381     ...And telltale bore
  382     ..Having telltale bore
  383     .Multipart
  384     ..Axially adjustable
  385     ..Comprising longitudinal side-by-side sections
  386     .Pilot end having means enhancing fastening or installation
  387     ..Drill tip
  388     .Double-ended
  389     ..Both ends threaded
  390     .Single element having means facilitating or effecting
            separation
  391     ..By fluent pressure
  392     .Resiliently flexible
  393     .Set screw
  394     .Drive screw
  395     .Having bore therethrough
  396     .Separate head element
  397     ..Threadedly attached to shank
  398     .Head eccentric with respect to fastener axis
  399     .Head having counter-sinking means
  400     .Hook head, e.g., J-bolt, etc.
  401     .Elongated head, e.g., hanger bolt, etc.
  402     .Head driving structure
  403     ..Socket or slot
  404     ...Orthogonally arranged slots, e.g., Phillips head, etc.
  405     ...Opposed open ended plural slots, e.g., spanner, etc.
  406     ...Dovetail
  407     ...Having driver retaining means
  408     ..Frictional engagement
  409     ..Wing structure
  410     ..Plural diverse driving structures
  411     .Thread or shank structure
  412     ..Plural threads on single shank
  413     ...Of different pitch
  414     ..Buttress thread
  415     ..Of varying thread pitchh
  416     ..Lobular thread
  417     ..Circumferentially interrupted thread
  418     ...By longitudinal slot
  419     ....Shank bifurcated by slot extending entirely therethrough
  420     ....Inclined slot
  421     .....Helically oriented
  422     ...By transversely extending bore
  423     ..Truncated thread
  424     ..Shank structure
  425     ...Twisted
  426     ...Tapered
  427     INTERNALLY THREADED FASTENER ELEMENT, E.G., NUT, ETC.
  428     .Including lubricating means
  429     .Having cap
  430     ..Cap crimped onto nut
  431     ..Resiliently retained
  432     .Multipart
  433     ..Including movable threaded segments
  434     ...Moved by fluent pressure
  435     .Wing
  436     .Thread structure
  437     ..Interrupted
  438     ..Coil spring
  439     IMPACT DRIVEN FASTENER, E.G., NAIL, SPIKE, TACK, ETC.
  440     .Having means to facilitate explosive driving
  441     ..Discrete guide or centering means
  442     .Plural attached fasteners
  443     ..Integral strip
  444     ..Laterally attached only at head or bridge
  445     ..Attached end-to-end
  446     .Including integral locking means
  447     ..Comprising deformable portion
  448     ...Expansible on impact
  449     ....Axially collapsible section
  450     ..Having means engageable on underside of member being secured
             by fastener
  451     ..Comprising protrusion or recess means on shank
  452     ...Longitudinal rib
  453     ....Spiral rib
  454     .....Defined by twisted shank
  455     ...Circumferential rib
  456     ...Barb
  457     .Multiple prong, e.g., nailing plate, staple, etc.
  458     ..Oppositely disposed prongs
  459     ...Having plural prongs on one end
  460     ...Having identical ends
  461     ..Of sheet metal
  462     ...Including stiffening means
  463     ....Rib
  464     .....Entire fastener having corrugations parallel to driving
                direction
  465     ......Having sawtooth penetrating edge
  466     ...Prongs cut and formed from body portion
  467     ....Plural prongs from single opening
  468     .....Including opposed prongs defining mirror image of each
                other
  469     ..Multipart
  470     ..Having prongs of different lengthh
  471     ..Each prong bevelled from a single side toward its opposite
             side
  472     ...Bevel located on outerside of prong
  473     ..Having distinct driving head
  474     ...Plural heads
  475     ..Having means to limit penetration short of bridge portion
  476     ..Having frangible portion
  477     .Of sheet metal
  478     ..Folded or twisted
  479     ..Hollow fastener
  480     .Separately attached head
  481     .Head having central recess
  482     .Plural axially aligned heads
  483     .Wire formed head
  484     .Domed head
  485     .Hook head
  486     .Head forms segment of disk
  487     .Shank or penetrating end structure
  488     ..Flat-sided shank
  489     ...Tapered
  490     ..Stepped shank
  491     ..Oval or lobular shank
  492     ..Angular shank portion
  493     ..End structure
  494     ...Pyramidal point
  495     ...Slotted end
  496     ...Chisel point
  497     ...Stepped end
  498     ...Conical point
  499     ...Having a curved surface
  500     HEADED FASTENER ELEMENT
  501     .Having plastically flowable or deflectable end, e.g., rivet,
            etc.
  502     ..Plural end legs
  503     ...Sheet metal type
  504     ..Solid end type
  505     ...Stay bolt
  506     ...Bolt head and end flowable
  507     ....Domed head
  508     .Having resilient securing structure on shank
  509     ..Concentric ridge or flange
  510     ...Plural ridges or flanges
  511     FASTENER SECURING ELEMENT
  512     .Having elastomeric material
  513     .Cotter pin
  514     ..Having deformed resilient middle portion
  515     ..Having folded back leg
  516     .Resilient metallic
  517     ..Retainer ring
  518     ...Having gripper holes
  519     ...Plural radial sectioned
  520     ..Sheet metal
  521     ...Circular
  522     ...Parallel legs, e.g., U-shaped, etc.
  523     ....Folded leg having fastener aperture or recess
  524     .....Plural folds
  525     ...Having plural longitudinal slits
  526     ....And slit coincident with element axiss
  527     ....And helically inclined tongues, e.g., speed nut, etc.
  528     ...Having longitudinal slit coincident with element axis
  529     ...Having longitudinal slot forming fastener engaging slide
  530     ..Wire or rod formed
  531     WASHER STRUCTURE
  532     .Including release means
  533     .Including means for retaining washer to fastener
  534     .Including antifriction means
  535     .Including adjustable thickness means
  536     ..Wear or lost motion compensating means
  537     .Having leveling means
  538     ..Inclined planar face
  539     .Radially positionable
  540     ..Pivotally hinged sections
  541     ..Secured by plastic deformation
  542     .Sealing
  543     .Wire formed
  544     .Axially resilient
  545     .Corrugated
  546     .Spacer
  547     ..Of folded sheet material
  548     MISCELLANEOUS
  *       ******************************
  *       CROSS-REFERENCE ART COLLECTIONS
  *       ******************************
  900     FASTENER OR FASTENER ELEMENT COMPOSED OF PLURAL DIFFERENT
           MATERIALS
  901     .Core and exterior of different materials
  902     ..Metal core
  903     ...Resinous exterior
  904     FASTENER OR FASTENER ELEMENT COMPOSED OF NONMETALLIC MATERIAL
  905     .Paper or wood
  906     .Leather or fabric
  907     .Elastomeric
  908     .Resinous material
  909     FASTENER OR FASTENER ELEMENT COMPOSED OF THERMO-RESPONSIVE
           MEMORY MATERIAL
  910     ANTITAMPER MEANS
  911     .One-way drive
  912     ANTISPLITTING FASTENER
  913     SELF-EXPANDING ANCHOR
  914     COATED BOLT
  915     BOLT HAVING PACKING JOINT
  916     BOLT HAVING TENSION FEATURE
  917     NUT HAVING TENSION FEATURE
  918     THREADLESS NUT
  919     SCREW HAVING DRIVING CONTACTS
  920     STAPLE
  921     MULTIPLE-PRONGED NAIL, SPIKE OR TACK
  922     NAIL, SPIKE OR TACK HAVING LOCKING DEVICE
  923     NAIL, SPIKE OR TACK HAVING SPECIFIC HEAD STRUCTURE
  924     COUPLED NUT AND BOLT
  924.1   .Deformed
  925     .Top stop
  926     .Positive lock
  927     ..Side
  928     ..Thread gripper
  929     .Thread lockk
  929.1   ..Coil spring
  929.2   ..Distorted washer
  930     ..Flowing metal or settable material
  931     ..Superposed nuts
  932     ...Oppositely threaded
  933     ....Key or pawl locked
  934     .....Side locked
  935     ..Cam or cone grip
  935.1   ...Cam
  936     ..Canted nut
  937     ..Distorted nut
  937.1   ...Predistorted thread pitch or diameter
  937.2   ...Post-distorted thread pitch or diameter
  938     ..Distorted thread
  939     ..Longitudinal key
  940     ..Radial key or gib
  941     ..Side clutch
  941.1   ...Spring
  941.2   ...Roller
  941.3   ...Ball
  942     ..Tangential key
  943     .Flexible washer
  944     .Flexible key
  945     .Cross key
  946     ..Spring-seated
  947     .Elastic-gripping action
  948     .Longitudinal key
  949     .Rachet and bolt-carried pawl
  950     .Rachet and nut-carried pawl
  951     ..Flexible
  952     ..Pivoted
  953     .Washer-carried pawl
  954     .Wedged slotted bolt
  955     LOCKED BOLTHEAD OR NUT
  956     .Automatic base clutch
  957     ..Biting tooth
  958     ...Coiled washer
  959     ...Bolt- or nut-carried
  960     ..Friction
  961     ..Pawl and ratchet
  962     ...Bolthead or nut-carried pawl
  963     ...Yielding interlocking washer
  964     ..Detent
  965     .With retainer
  966     ..Multiple (i.e., gang type)
  967     ..Deformable bolthead or nut
  968     ..Deformable base member
  969     ..Deformable retainer
  970     ..Resilient retainer
  971     ..And side lock
  972     .Distorted
  973     .Gravity bolthead, nut or washer
  974     .Side lock
  975     ..Rotatable washer
  976     ...Bent tongue-locked
  977     ...Pawl-locked
  978     ..Pawl and ratchet
  979     ..Resilientt
  980     ...Automatic
  981     ....Coiled washer
  982     ....Spring-tongued washer plate
  983     ..Inelastic tongue
  984     ..Longitudinal
  985     ...Bolthead- or nut-held
  986     ....Reversed bolthead or nut
  987     ...Side pin
  988     ...Spike-held locking plate
  989     ...Swinging
  990     ...Washer tongue-held
  991     ..Transversely sliding
  992     ...Key, plate, or bar
  993     ....bolthead- or nut-held
  994     ....Sliding washer
  995     ..Transversely swinging
  996     .Transverse base-locking key
  997     .Longitudinal fastener
  998     WITH POSITIVE BOLT LOCK
  999     WITH RETAINER (E.G., TETHER)
  *       ******************************
  *       DIGESTS
  *       ******************************
  DIG 1   THREAD FORMING, REFORMING, OR CLEANING
  DIG 2   TEMPERATURE MODIFICATION
  DIG 3   UTILIZING FLUID PRESSURE