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
that is, no embedded spaces, class and subclass seperated by a dash, and any subclass letters capitalized. Currently Design Patent titles (those in the classes of the form Dxx.yy) are not retreivable.

Enter class/subclass code:


Class Number: 175
 Class Title: BORING OR PENETRATING THE EARTH

Subclass  Subclass
Number    Title

  1       WITH SEISMIC SHOCK GENERATING
  2       BORING WITH EXPLOSION IN INACCESSIBLE HOLE
  3       .Severing formed core by explosion
  3.5     .Explosive charge carried by projectile
  4       .Driving core receiver by explosion or with receptacle
            collecting material in bore
  4.5     .Directing successive projectiles or charges in same path
  4.51    .With position orienting or indicating
  4.52    .With wall engaging packer or anchor
  4.53    .Firing chamber movable in bore relative to carrier or
            another firing chamber
  4.54    .With bore condition firing control, or compensating means
  4.55    .Independent firing of plural charges
  4.56    .Firing control mechanically actuated in bore
  4.57    .Projectile forms bore
  4.58    ..With means to initially restrain projectile for pressure
             build-up
  4.59    ..With means to prevent preliminary bore fluid contact
  4.6     .Concave-shaped charge
  5       BORING A SUBMERGED FORMATION
  6       .Boring with underwater tool drive prime mover
  7       .Boring from floating support with submerged independent
            anchored guide base
  8       .Boring from submerged buoyant support
  9       .Boring from nonbuoyant support
  10      .Boring with submersible vertically movable guide
  11      BORING BY DIRECTLY APPLYING HEAT TO FLUIDIZE OR COMMINUTE
  12      .Combustion of the formation material
  13      .With introduction of slag forming flux
  14      .Combustion is confined chamber having restricted discharge
            orifice
  15      .Rotating the heating tool
  16      .Electrically produced heat
  17      WITH HEATING OR COOLING (1) WITHIN THE BORE, OR (2) DRILLING
           FLUID
  18      ICE BORING
  19      BORING WITHOUT EARTH REMOVAL (I.E., COMPACTING EARTH FORMATION)
  20      .Combined with earth removal (e.g., removing sample)
  21      .Fluid passage to exterior of drive point
  22      .Drive point detached from shaft to form cased bore or with
            installation of casing
  23      ..Drive point retracted through shaft or casing
  24      AUTOMATIC CONTROL
  25      .Of fluid pressure below ground
  26      .Of boring means including a below-ground drive prime mover
  27      .Of advance or applied tool weight
  38      .In response to drilling fluid circulation
  39      WITH BIT WEAR SIGNAL GENERATING
  40      WITH SIGNALING, INDICATING, TESTING OR MEASURING
  41      .Ray energy detection or measuring
  42      .Indicating agent released in drilling fluid
  44      .Providing identifiable indication of core position in situ forr
            core sample orientation
  45      .Tool position direction or inclination measuring or indicating
            within the bore
  46      .Signaling or indicating condition of cutting in cuttings
            retainer
  48      .Measuring or indicating drilling fluid (1) pressure, or (2)
            rate of flow
  49      .Transparent inspection feature
  50      .Indicating, testing or measuring a condition of the formation
  51      WITH SELF-ACTING CYCLIC ADVANCE AND RETRACTION OF TOOL OR TOOL
           SHAFT
  52      WITH MAGAZINE FOR SUCCESSIVELY MOVING UNCONNECTED, ORIENTED TOOL
           OR SHAFT SECTIONS TO USE POSITION
  53      ENLARGEMENT OF EXISTING PILOT THROUGHBORE REQUIRING
           ACCESSIBILITY TO EXISTING OPPOSITE BORE ENDS TO INSERT AND
           REMOVE TOOL
  54      BORING BY BELOW GROUND RECIRCULATION OF UNSUPPORTED ELEMENTS
           (E.G., SHOT)
  55      TOOL ACTUATION BY REACTION OF ROTATING ECCENTRIC MASS
  56      NATURAL VIBRATION CHARACTERISTIC OF AN ELEMENT OF BORING MEANS
           RELATED (1) TO NATURAL VIBRATION CHARACTERISTIC OF ANOTHER
           ELEMENT, OR (2) TO FREQUENCY OF AN IMPOSED MOTION
  57      PROCESSES
  58      .Sampling of earth formations
  59      ..Retaining fluid or taking separate fluid sample
  60      ..Transporting sample to surface by fluid
  61      .Boring curved or redirected bores
  62      .Boring horizontal bores
  64      .Chemical reaction with earth formation or drilling fluid
            constituent
  65      .Boring with specific fluid
  66      ..Treating spent or used fluid above ground
  67      ..Boring by fluid erosion
  68      ..Anti-agglomeration treatment of gaseous drilling fluid
  69      ..Combined liquid and gaseous fluid
  70      ..Plural distinguishable liquids
  71      ..Gaseous fluid or under gas pressure
  72      ..Prevention of lost circulation or caving
  73      MEANS TRAVELING WITH TOOL TO CONSTRAIN TOOL TO BORE ALONG CURVED
           PATH
  74      .Sectional guide or shaft having means to lock sections in
            angular relation while boring
  75      .Normally curved guide or shaft
  76      .Axially spaced opposed bore wall engaging guides
  77      SIDE WALL TOOL FED LATERALLY WITHOUT ROTATION FROM INACCESSIBLE
           HOLE
  78      MEANS CARRIED BY HOUSING INSERTABLE IN INACCESSIBLE HOLE TO
           ADVANCE SIDE WALL TOOL LATERALLY
  79      TOOL SHAFT ADVANCED RELATIVE TO GUIDE INSERTABLE IN INACCESSIBLE
           HOLE TO CHANGE DIRECTION OF ADVANCE
  80      .Tool telescopes over guide having surface set at angle in hole
  81      .With anchor for guide engaging hole side wall
  82      .Guide carried by shaft to operative position
  83      ..With clutch means acting between shaft and guide
  84      WITH ABOVE-GROUND CLEANER FOR BORING MEANS
  85      WITH ORIENTING OR RACKING MEANS FOR UNCONNECTED TOOLS OR
           SECTIONS OF SHAFT OR CASING
  86      WITH BELOW-GROUND PERSONAL ACCOMMODATIONN
  87      CONVERTIBLE
  88      WITH MEANS CARRYING CUTTINGS LATERALLY OF BORE AXIS COMPRISING
           (1) CHUTE, (2) CONVEYER, OR (3) VEHICLE
  89      TOOL ELEMENT OR CONTINUOUSLY DRIVEN FLEXIBLE OR ARTICULATED
           ENDLESS MEMBER
  90      .Flexible or articulated member carried on support swingable or
            laterally movable relative to bore axis
  91      BORING MEANS INCLUDING A CONTINUOUSLY ROTATING BIT DESCRIBING A
           NONCIRCULAR CROSS-SECTIONAL BORE
  92      WITH BELOW-GROUND TOOL DRIVE PRIME MOVER
  93      .Below-ground (1) generation of motive fluid, or (2) storage of
            motivating energy
  94      .With below-ground feed means
  95      .Plural below-ground drive prime movers
  96      ..Plural cutter elements driven by individual prime movers
  97      .With means to anchor prime movers support to bore wall
  98      ..Expansible anchor
  99      ...Fluid-operated
  100     .Discharge passage for motive fluid directed toward bore
            entrance
  101     .With positive connection between tool and support shaft for
            rotary below ground motor
  102     .With below-ground conveyer or impeller for removal of cuttings
  103     .With above-ground means
  104     .Electric
  105     ..Reciprocating
  106     .With mechanical motion-converting means
  107     .Fluid rotary type
  108     COMMON DRIVE OR ADVANCING MEANS FOR CONCURRENTLY BORING ALONG
           LATERALLY SPACED AXES
  113     WITH MEANS TO SIMULTANEOUSLY FEED AND ROTATE TOOL FROM A SINGLE
           MECHANICAL ELEMENT
  114     .Constant rotation rate permitted regardless of (1) release of
            feed force, or (2) change in feed rate
  118     .With feed anchor in earth wall being bored
  121     .Rotary drive for relatively advancing feed screw
  122     WITH MEANS TO FEED DRIVE
  135     WITH ABOVE-GROUND MEANS TO IMPACT AN EARTH-PENETRATING MEANS
  161     WITH ABOVE-GROUND MEANS TO MOVE TOOL TO A DUMPING LOCATION
           OFFSET FROM BORE
  162     WITH ABOVE-GROUND MEANS TO FEED TOOL
  170     WITH TOOL DRIVE PRIME MOVER OR ABOVE-GROUND MECHANICAL MOTION
           CONVERTING DRIVE MEANS
  171     .With installing casing
  172     .With endless flexible conveyer
  173     .With diversely operated shafts extending into bore
  189     .Drive reciprocates tool
  195     .Rotary drive for a relatively advancing tool (e.g., rotary
            table)
  202     ABOVE-GROUND MEANS FOR RELATIVELY MOVING BELOW-GROUND TOOL
           ELEMENTS
  203     WITH ABOVE-GROUND MEANS TO ADVANCE OR RETRACT BORING MEANS
  205     WITH MEANS PROVIDING PRESSURIZED GAS CONTACT WITH DRILLING
           LIQUID
  206     WITH ABOVE-GROUND MEANS FOR PREPARING OR SEPARATING DRILLING
           FLUID CONSTITUENTS
  207     WITH ABOVE-GROUND MEANS FOR HANDLING DRILLING FLUID OR CUTTING
  208     .Fluid sprayy
  209     .Fluid or cuttings directing or receiving means engaging bore
            entrance
  210     ..Anchored to bore wall
  211     ..Axially supported by tool shaft
  212     .Pressurized gas supply
  213     .With suction pump inlet communicating with bore bottom
  214     .Fluid head on tool shaft having lateral port and axial passage
            with seal for means reciprocable in the head
  215     .With tool shaft having plural passages for drilling fluid
  216     .Standpipe
  217     .With pump
  218     .With valve
  219     WITH PARTICULAR ACCOMMODATION FOR PERSONNEL (E.G., SEAT OR
           PROTECTOR)
  220     WITH ABOVE-GROUND GUIDE FOR RELATIVELY ADVANCING TOOL
  226     WITH SAMPLE COVERING OR COATING MEANS (1) DISPENSED INTO SAMPLE
           RECEIVER, OR (2) FLUENT
  227     WITH STORAGE MEANS FOR BIT LUBRICANT CARRIED BY BIT OR SHAFT
  228     .With fluid pressure-actuated feed means
  229     .Rotation of bit actuates lubricant feed means
  230     WITH EXPANSIBLE BORE WALL ANCHOR (E.G., PACKER)
  231     WITH MEANS MOVABLE RELATIVE TO TOOL BELOW GROUND TO CONTROL
           ECCENTRIC FLUID EMISSION
  232     WITH MEANS MOVABLE RELATIVE TO TOOL BELOW GROUND TO STOP FLOW
           TOWARD BORE BOTTOM
  233     .Movable to seal sample receiver at bore bottom pressure
  234     .With longitudinally spaced valve seats
  235     ..Seat engaged to stop upward flow
  236     .In sample receiver removable through below-ground tool shaft
  237     .Means comprises dropped element
  238     .Flow-stopping means includes relatively movable cutter element
  239     .With undisturbed core receiver
  240     ..Movable means adapted to underlie severed core
  241     .Stops flow by movement about fixed pivot
  242     ..Pivot transverse to tool axis
  243     .Resiliently biased or composed of flexible material
  244     WITH MEANS MOVABLE RELATIVE TO TOOL TO RECEIVE, RETAIN, OR SEVER
           UNDISTURBED CORE
  245     .Core bit closure relative upwardly movable by core
  246     .Receiver removable through below-ground tool shaft
  247     ..With fluid pressure-responsive means to remove receiver or
             operate latch
  248     ..Core forming cutting edge or element on receiver
  249     .Core-retaining or severing means
  250     ..Fluid-actuated
  251     ..Actuated upon relative movement between tool and tool shaft
  252     ...Relative rotary movement
  253     ..With element holding retaining or severing means inactive
  254     ..Mounted on transverse pivot
  255     ..Sliding wedge type (e.g., slips)
  256     WITH RELEASABLE MEANS NORMALLY HOLDING JOINTED SHAFT SECTIONS IN
           ANGULAR RELATION
  257     TOOL REMOVABLE OR INSERTABLE THROUGH OR AROUND DRIVING OR DRIVEN
           SHAFT OR CASING
  258     .Laterally shiftable cutter element movable through shaft
  259     ..Plural cutter elements longitudinally relatively movable into
             transverse alignment
  260     ..Cutter element engages torque transmitting abutment on shaftt
             when expanded
  261     ...With additional torque transmitting abutment on bit head and
              shaft
  262     .Tool movable exteriorly of shaft
  263     CUTTER ELEMENT LATERALLY SHIFTABLE BELOW GROUND (E.G.,
           EXPANSIBLE)
  264     .With separable means holding tool collapsed above ground only
  265     .Plural cutter elements longitudinally relative movable into
            transverse alignment
  266     .Plural selectively shiftable cutter elements
  267     .Cutter element shifted by fluid pressure
  268     ..With dropped element
  269     ..Fluid pressure acts against spring biased part
  270     .Cutter element shifted by dropped element
  271     .With latch operated by fluid pressure or dropped element
  272     .Cutter element shifted by relatively longitudinally movable
            threaded elements
  273     .Cutter element shifted by cam or gear axially rotatable
            relative to shaft
  274     .With shifting mechanism spring biased to operative position
  275     ..With separate latch
  276     ...Frangible or discardable element
  277     ...Latch holds mechanism retracted
  278     ....Latch return shifting mechanism to inoperative position
  279     ..Cam or gear means movable to shift cutter element
  280     ...With forwardly extending noncutting portion
  281     ..Cutter element substantially longitudinally movable on shaft
  282     ...Plural elements expanded into single socket
  283     ...With forwardly extending noncutting portion
  284     .Cutter element shifted by longitudinally relatively movable
            parts
  285     ..Toggle or linkage between movable parts
  286     ..Cam or gear engaging cutter element
  287     ...With separate latch holding cutter element in shifted
              position
  288     ...Cutter element substantially longitudinally movable on shaft
  289     ...Cutter element spring biased to retracted position
  290     .With latch
  291     .Spring biased
  292     .Pivoted about substantially longitudinal axis
  293     BELOW-GROUND (1) HAMMER, OR (2) IMPACT MEMBERS
  294     .Combined with safety joint
  295     .With noncutting portion forwardly of sleeve impact member
            having a cutting portion (e.g., reamer)
  296     .Fluid-operated
  297     ..Restricted orifice for initially delaying escape of
             restraining fluid
  298     .Continuous unidirectional rotary motion of one telescoping
            member effects consecutive impacts
  299     .Resiliently biased
  300     .With releasable means to detachably retain telescoping members
            against axial reciprocation
  301     ..Frangible
  302     ..Condition for release adjustable
  303     ...Adjustable below ground
  304     ..Resiliently biased latch
  305     .Telescoping members relatively rotatable
  306     ..With means to couple members to prevent relative rotationn
  307     WITH CUTTING EDGE COVER
  308     WITH RECEPTACLE
  309     .Removable or insertable through below-ground tool shaft
  310     .With helical conveyer
  311     .Suspended below bit
  312     .Sieve or strainer
  313     WITH MECHANICAL CLEANER FOR BIT OR CUTTER ELEMENT
  314     WITH WELL-TYPE SCREEN
  315     COMBINED
  316     WITH RELATIVELY MOVABLE PARTS TO FACILITATE CLEANING WITHOUT
           DISASSEMBLY
  317     WITH MEANS MOVABLE RELATIVE TO TOOL OR SHAFT TO CONTROL
           BELOW-GROUND PASSAGE
  318     .Valve prevents upward flow
  319     BELOW-GROUND MECHANICAL MOTION CONVERTING MEANS RELATIVELY
           MOVING PLURAL CUTTING EDGES
  320     WITH TOOL SHAFT DETAIL
  321     .Axially telescoping shaft section
  322     ..Telescoping motion related to relative axial rotation or
             oscillation
  323     .Helix or helically arranged structure
  324     .Means other than tool structure to induce fluent flow
  325.1   .Shaft carried guide or protector
  325.2   ..Coupled between shaft sections or bit and shaft section
  325.3   ...With bore wall engaging means rotatable relative to
              shaft section (e.g., with bearings)
  325.4   ...Having removable inserts
  325.5   ..Surrounding existing shaft section
  325.6   ...Held by a fastener parallel to shaft axis
  325.7   ...Held by discrete fastening means tangential to shaft
              axis
  326     ..Engaging means advances in adjacent hole
  327     BIT OR BIT ELEMENT
  331     .Rolling cutter bit or rolling cutter bit element
  332     ..Core forming-type bit
  333     ...With core-breaking means
  334     ..Bit with leading cutter forming smaller diameter initial bore
  335     ...Leading fixed cutter
  336     ..Rolling cutter bit with fixed cutter
  337     ..With drilling fluid supply to bearing
  338     ..With rotary or endless carrier
  339     ..With drilling fluid conduit details
  340     ...Fluid conduit lining or element (e.g., slush tube or nozzle)
  341     ..Plural rolling cutters with intermeshing teeth
  342     ..Adjustable cutter element
  343     ..Wobbling cutter
  344     ..Noncutting portion forwardly of rolling cutter (e.g., reamer)
  345     ...Longitudinal axis cutter
  346     ....Separable support for cutter axle
  347     ....Removable axle or bushing
  348     ..Longitudinal axis cutter
  349     ...With transverse axis cutter
  350     ..Laterally offset cutter axis
  351     ...Disk blade
  352     ....Plural coaxial cutters
  353     ...Cone or frustum rolling cutter
  354     ..Axle rotatable with cutter
  355     ..Circumferentially displaced cutter axess
  356     ...Stub axle only
  357     ...Detachable multiaxis support or spider
  358     ...Mutually contacting cutter supports
  359     ....With bearing or seal details
  360     ..Cross axle with stub axle
  361     ..Cross axle
  362     ...Vertically disaligned cross axle sections
  363     ...Separable supports
  364     ...Removable cross axle or bushing
  365     ..Outwardly directed stub axle
  366     ..Separable support for stub axle
  367     ..Detachable stub axle, bushing or bearing
  368     ...Releasable cutter securing device
  369     ..Stub axle cutter securing means
  370     ...Released by antifriction bearing disassembly
  371     ..With bearing or seal details
  372     ...Antifriction type
  373     ..Disk cutter
  374     ..Specific or diverse material
  375     ...Welded
  376     ..Nonsymmetrical bit (e.g., nontracking)
  377     ..Spiral rib or tooth row
  378     ..Irregular tooth cutter row
  379     .Cutting edge self-renewable during operation
  380     .Unsupported abrading particle type (e.g., shot)
  381     .Cutting edges relatively longitudinally movable during
            operation
  382     .Adjustable cutter element
  383     ..Adjustment presents different cutting edge
  384     ..Radially adjustable
  385     .Bit with leading portion (e.g., pilot) forming smaller diameter
            initial bore
  386     ..Leading portion is separable starter
  387     ..Leading portion is core forming type
  388     ..Leading portion is a screw
  389     ..Impact type
  390     ...Plural larger diameter steps
  391     ..Plural larger diameter steps
  392     ..Leading portion is forked rotary type
  393     .With fluid conduit lining or element (e.g., slush tube)
  394     .With helical-conveying portion
  395     ..Impact type
  396     .Axially parallel side wall with transverse cuttings retaining
            portion
  397     .Forked rotary nontracking
  398     .Nonsymmetrical bit
  399     ..With bore wall engaging guide
  400     ..Nonsymmetrical arrangement of opening for cuttings or fluid
  401     .Cutting edges facing in opposite axial directions
  402     .Casing shoe type
  403     .Core forming type
  404     ..With core-breaking means
  405     ..Impact or percussion type
  405.1   ..Includes diamond
  406     .Noncutting portion forwardly of cutting portion (e.g., reamer)
  407     ..Impact type
  408     .With bit guide or bore wall compacting device
  412     .Plural separable cutter elementss
  413     ..Independently attachable
  414     .Impact or percussion type
  415     ..Combined with rotary
  416     ..Noncircular bore cutter
  417     ..With internal-fluid passage
  418     ...Plural openings
  419     ...Cruciform
  420     ..Cruciform
  420.1   ..Insert
  420.2   ...Includes diamond
  421     .Symmetrical forked rotary type (e.g., fishtail)
  328     .Magnetized or with magnet
  425     .Specific or diverse material
  426     ..Insert
  427     ...In a mining pick
  428     ...Preformed cutting element (e.g., compact) mounted on a
              distinct support (e.g., blank, stud, shank)
  429     ....Including a nozzle
  430     ....Having a noncircular or nonplanar cutting face
  431     ....Having a particular orientation or location
  432     ....With support detail
  433     ....Having a specified thermal property
  434     ..Diamond
  435     ..Welded, brazed, or soldered
  424     MISCELLANEOUS (E.G., EARTH-BORING NOZZLE)
  423     WEDGING SLIP ASSEMBLY FOR SUPPORTING A PIPE OR ROD