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Classification Resources
 
Class   277SEAL FOR A JOINT OR JUNCTURE
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[List of Pre Grant Publications for class 277 subclass 300][List of Patents for class 277 subclass 300]300 PROCESS OF DYNAMIC SEALING
[List of Pre Grant Publications for class 277 subclass 312][List of Patents for class 277 subclass 312]312 PROCESS OF STATIC SEALING
[List of Pre Grant Publications for class 277 subclass 317][List of Patents for class 277 subclass 317]317 SEAL COMBINED WITH INDICATOR, SAMPLER, OR INSPECTION FEATURE
[List of Pre Grant Publications for class 277 subclass 322][List of Patents for class 277 subclass 322]322 SEAL FOR WELL APPARATUS
[List of Pre Grant Publications for class 277 subclass 345][List of Patents for class 277 subclass 345]345 SEAL BETWEEN RELATIVELY MOVABLE PARTS (I.E., DYNAMIC SEAL)
[List of Pre Grant Publications for class 277 subclass 346][List of Patents for class 277 subclass 346]346 Subclass 346 indent level is 1 Diverse and distinct dynamic seals
 [List of Pre Grant Publications for class 277 subclass 354][List of Patents for class 277 subclass 354]354 Subclass 354 indent level is 1 Helically threaded part
 [List of Pre Grant Publications for class 277 subclass 355][List of Patents for class 277 subclass 355]355 Subclass 355 indent level is 1 Brush seal
 [List of Pre Grant Publications for class 277 subclass 356][List of Patents for class 277 subclass 356]356 Subclass 356 indent level is 1 For journal box (e.g., railway car journal, etc.)
 [List of Pre Grant Publications for class 277 subclass 357][List of Patents for class 277 subclass 357]357 Subclass 357 indent level is 1 For rotary piston
[List of Pre Grant Publications for class 277 subclass 358][List of Patents for class 277 subclass 358]358 Subclass 358 indent level is 1 Relatively rotatable radially extending sealing face member (e.g., face, mechanical, etc.)
[List of Pre Grant Publications for class 277 subclass 359][List of Patents for class 277 subclass 359]359 Subclass 359 indent level is 2 Temperature responsive feature
[List of Pre Grant Publications for class 277 subclass 361][List of Patents for class 277 subclass 361]361 Subclass 361 indent level is 2 Multiple sealing faces (e.g., double seals, etc.)
[List of Pre Grant Publications for class 277 subclass 370][List of Patents for class 277 subclass 370]370 Subclass 370 indent level is 2 Installation, removal, assembly, disassembly, or repair feature
[List of Pre Grant Publications for class 277 subclass 377][List of Patents for class 277 subclass 377]377 Subclass 377 indent level is 2 Particular axial biasing feature
[List of Pre Grant Publications for class 277 subclass 390][List of Patents for class 277 subclass 390]390 Subclass 390 indent level is 2 Particular secondary mounting seal or driving connection
 [List of Pre Grant Publications for class 277 subclass 398][List of Patents for class 277 subclass 398]398 Subclass 398 indent level is 2 Eccentric, gyratory, or oscillatory motion
[List of Pre Grant Publications for class 277 subclass 399][List of Patents for class 277 subclass 399]399 Subclass 399 indent level is 2 Particular sealing face member configuration
[List of Pre Grant Publications for class 277 subclass 404][List of Patents for class 277 subclass 404]404 Subclass 404 indent level is 2 Made of particular material
 [List of Pre Grant Publications for class 277 subclass 408][List of Patents for class 277 subclass 408]408 Subclass 408 indent level is 2 Introduction, circulation, or removal of fluid
[List of Pre Grant Publications for class 277 subclass 409][List of Patents for class 277 subclass 409]409 Subclass 409 indent level is 1 Close proximity seal (e.g., contactless, fluent, etc.)
 [List of Pre Grant Publications for class 277 subclass 433][List of Patents for class 277 subclass 433]433 Subclass 433 indent level is 1 Centrifugal force affects change in displacement, shape, or contact
[List of Pre Grant Publications for class 277 subclass 434][List of Patents for class 277 subclass 434]434 Subclass 434 indent level is 1 Piston ring or piston ring expander or seat therefor
 [List of Pre Grant Publications for class 277 subclass 435][List of Patents for class 277 subclass 435]435 Subclass 435 indent level is 2 Having installation, removal assembly, disassembly, or repair feature
[List of Pre Grant Publications for class 277 subclass 436][List of Patents for class 277 subclass 436]436 Subclass 436 indent level is 2 Piston ring having peripheral radially sealing flexible projection (e.g., piston cup, etc.)
[List of Pre Grant Publications for class 277 subclass 440][List of Patents for class 277 subclass 440]440 Subclass 440 indent level is 2 Piston ring surface of dissimilar material or hardness
[List of Pre Grant Publications for class 277 subclass 445][List of Patents for class 277 subclass 445]445 Subclass 445 indent level is 2 Rotation limiting feature (i.e., antirotation)
[List of Pre Grant Publications for class 277 subclass 447][List of Patents for class 277 subclass 447]447 Subclass 447 indent level is 2 Floating piston ring
[List of Pre Grant Publications for class 277 subclass 449][List of Patents for class 277 subclass 449]449 Subclass 449 indent level is 2 Particular piston seat
 [List of Pre Grant Publications for class 277 subclass 458][List of Patents for class 277 subclass 458]458 Subclass 458 indent level is 2 Piston ring having single piece noncircular or multiturn (e.g., helical, spiral, oblong, elliptical, polygonal, etc.) shape
[List of Pre Grant Publications for class 277 subclass 459][List of Patents for class 277 subclass 459]459 Subclass 459 indent level is 2 Piston ring including exposed port, slot, pocket, groove, channel, recess, or bevel
 [List of Pre Grant Publications for class 277 subclass 466][List of Patents for class 277 subclass 466]466 Subclass 466 indent level is 2 Piston ring displays twisting or torsion
[List of Pre Grant Publications for class 277 subclass 467][List of Patents for class 277 subclass 467]467 Subclass 467 indent level is 2 Particular piston ring expander
[List of Pre Grant Publications for class 277 subclass 489][List of Patents for class 277 subclass 489]489 Subclass 489 indent level is 2 Sectional piston ring structure
 [List of Pre Grant Publications for class 277 subclass 493][List of Patents for class 277 subclass 493]493 Subclass 493 indent level is 2 Segmented piston ring
[List of Pre Grant Publications for class 277 subclass 494][List of Patents for class 277 subclass 494]494 Subclass 494 indent level is 2 Separate bridging piece for gap in piston ring
[List of Pre Grant Publications for class 277 subclass 496][List of Patents for class 277 subclass 496]496 Subclass 496 indent level is 2 Split single piece piston ring having opposed asymmetrical mirrored ends
[List of Pre Grant Publications for class 277 subclass 498][List of Patents for class 277 subclass 498]498 Subclass 498 indent level is 2 Split single piece piston ring having other than opposed asymmetrical mirrored ends
[List of Pre Grant Publications for class 277 subclass 500][List of Patents for class 277 subclass 500]500 Subclass 500 indent level is 1 Circumferential contact seal for other than piston
 [List of Pre Grant Publications for class 277 subclass 501][List of Patents for class 277 subclass 501]501 Subclass 501 indent level is 2 And magnetic bias
 [List of Pre Grant Publications for class 277 subclass 502][List of Patents for class 277 subclass 502]502 Subclass 502 indent level is 2 For valve stem in internal combustion engine
[List of Pre Grant Publications for class 277 subclass 503][List of Patents for class 277 subclass 503]503 Subclass 503 indent level is 2 Accommodates gyratory or oscillatory motion
[List of Pre Grant Publications for class 277 subclass 510][List of Patents for class 277 subclass 510]510 Subclass 510 indent level is 2 Contained or compressed by gland member in packing box
[List of Pre Grant Publications for class 277 subclass 543][List of Patents for class 277 subclass 543]543 Subclass 543 indent level is 2 Segmented ring
[List of Pre Grant Publications for class 277 subclass 549][List of Patents for class 277 subclass 549]549 Subclass 549 indent level is 2 Peripheral radially sealing flexible projection (e.g., lip seal, etc.)
 [List of Pre Grant Publications for class 277 subclass 578][List of Patents for class 277 subclass 578]578 Subclass 578 indent level is 2 Having circumferentially adjustable biasing element
[List of Pre Grant Publications for class 277 subclass 579][List of Patents for class 277 subclass 579]579 Subclass 579 indent level is 2 Having floating ring or bushing (i.e., circumferentially contacting)
 [List of Pre Grant Publications for class 277 subclass 584][List of Patents for class 277 subclass 584]584 Subclass 584 indent level is 2 Extrusion preventing (i.e., antiextrusion) structure
 [List of Pre Grant Publications for class 277 subclass 585][List of Patents for class 277 subclass 585]585 Subclass 585 indent level is 2 Elongated sleeve or bushing
 [List of Pre Grant Publications for class 277 subclass 586][List of Patents for class 277 subclass 586]586 Subclass 586 indent level is 2 Seated in groove having stepped walls
 [List of Pre Grant Publications for class 277 subclass 587][List of Patents for class 277 subclass 587]587 Subclass 587 indent level is 2 Seated in groove having oblique wall
 [List of Pre Grant Publications for class 277 subclass 589][List of Patents for class 277 subclass 589]589 Subclass 589 indent level is 2 Radially backed by resilient or elastomeric member
[List of Pre Grant Publications for class 277 subclass 590][List of Patents for class 277 subclass 590]590 SEAL BETWEEN FIXED PARTS OR STATIC CONTACT AGAINST RELATIVELY MOVABLE PARTS
[List of Pre Grant Publications for class 277 subclass 591][List of Patents for class 277 subclass 591]591 Subclass 591 indent level is 1 Contact seal between parts of internal combustion engine
[List of Pre Grant Publications for class 277 subclass 602][List of Patents for class 277 subclass 602]602 Subclass 602 indent level is 1 Contact seal for a pipe, conduit, or cable
[List of Pre Grant Publications for class 277 subclass 628][List of Patents for class 277 subclass 628]628 Subclass 628 indent level is 1 Contact seal for other than internal combustion engine, or pipe, conduit, or cable
 
CROSS-REFERENCE ART COLLECTIONS
 
 [List of Pre Grant Publications for class 277 subclass 902][List of Patents for class 277 subclass 902]902 SEAL FOR STERLING ENGINE
 [List of Pre Grant Publications for class 277 subclass 903][List of Patents for class 277 subclass 903]903 SEAL FOR ROTATING KILN OR DRUM
 [List of Pre Grant Publications for class 277 subclass 904][List of Patents for class 277 subclass 904]904 VISCOUS SEAL
 [List of Pre Grant Publications for class 277 subclass 905][List of Patents for class 277 subclass 905]905 T-SHAPED OR I-SHAPED RING MEMBER INCLUDING SEAL ON A SIDE
 [List of Pre Grant Publications for class 277 subclass 906][List of Patents for class 277 subclass 906]906 SEAL FOR ARTICLE OF INDEFINITE LENGTH (E.G., STRIP, SHEET, ETC.)
 [List of Pre Grant Publications for class 277 subclass 907][List of Patents for class 277 subclass 907]907 PASSAGEWAY IN ROD OR SHAFT
 [List of Pre Grant Publications for class 277 subclass 908][List of Patents for class 277 subclass 908]908 SEAL FOR USE IN ROTATING AND RECIPROCATING ARRANGEMENT
 [List of Pre Grant Publications for class 277 subclass 909][List of Patents for class 277 subclass 909]909 SIMILAR SEALING STRUCTURES FOR MOUNTING ON PISTON AND ABOUT ROD
 [List of Pre Grant Publications for class 277 subclass 910][List of Patents for class 277 subclass 910]910 O-RING SEAL
[List of Pre Grant Publications for class 277 subclass 911][List of Patents for class 277 subclass 911]911 SEAL COMBINED WITH NOMINAL MOTION TRANSMITTING DEVICE
 [List of Pre Grant Publications for class 277 subclass 913][List of Patents for class 277 subclass 913]913 SEAL FOR FLUID PRESSURE BELOW ATMOSPHERIC (E.G., VACUUM, ETC.)
 [List of Pre Grant Publications for class 277 subclass 914][List of Patents for class 277 subclass 914]914 BACKUP SEAL FOR FAILURE OF PRIMARY SEAL
 [List of Pre Grant Publications for class 277 subclass 915][List of Patents for class 277 subclass 915]915 SEAL INCLUDING COMPRESSION SET FEATURE
 [List of Pre Grant Publications for class 277 subclass 916][List of Patents for class 277 subclass 916]916 SEAL INCLUDING VIBRATION DAMPENING FEATURE
 [List of Pre Grant Publications for class 277 subclass 917][List of Patents for class 277 subclass 917]917 SEAL INCLUDING FRANGIBLE FEATURE
 [List of Pre Grant Publications for class 277 subclass 918][List of Patents for class 277 subclass 918]918 SEAL COMBINED WITH FILTER OR FLUID SEPARATOR
 [List of Pre Grant Publications for class 277 subclass 919][List of Patents for class 277 subclass 919]919 SEAL INCLUDING ELECTRICAL FEATURE
 [List of Pre Grant Publications for class 277 subclass 920][List of Patents for class 277 subclass 920]920 SEAL INCLUDING ELECTROMAGNETIC SHIELDING FEATURE
 [List of Pre Grant Publications for class 277 subclass 921][List of Patents for class 277 subclass 921]921 CLOSURE OR WEATHER STRIP SEAL
[List of Pre Grant Publications for class 277 subclass 922][List of Patents for class 277 subclass 922]922 BONDING OR JOINING FOR MANUFACTURE OF SEAL
 [List of Pre Grant Publications for class 277 subclass 924][List of Patents for class 277 subclass 924]924 DEFORMATION, MATERIAL REMOVAL, OR MOLDING FOR MANUFACTURE OF SEAL
 [List of Pre Grant Publications for class 277 subclass 925][List of Patents for class 277 subclass 925]925 SNAP FIT FEATURE FOR MOUNTING OR ASSEMBLY OF SEAL
 [List of Pre Grant Publications for class 277 subclass 926][List of Patents for class 277 subclass 926]926 SEAL INCLUDING FLUID PRESSURE EQUALIZING OR BALANCING FEATURE
 [List of Pre Grant Publications for class 277 subclass 927][List of Patents for class 277 subclass 927]927 SEAL INCLUDING FLUID PRESSURE DIFFERENTIAL FEATURE
 [List of Pre Grant Publications for class 277 subclass 928][List of Patents for class 277 subclass 928]928 SEAL INCLUDING PRESSURE RELIEF OR VENT FEATURE
 [List of Pre Grant Publications for class 277 subclass 929][List of Patents for class 277 subclass 929]929 SEAL FEATURE WHERE CHANGE IN OPERATION OR CONDITION INDUCES ADDITIONAL LEAKAGE CONTROL
 [List of Pre Grant Publications for class 277 subclass 930][List of Patents for class 277 subclass 930]930 SEAL INCLUDING HEATING OR COOLING FEATURE
[List of Pre Grant Publications for class 277 subclass 931][List of Patents for class 277 subclass 931]931 SEAL INCLUDING TEMPERATURE RESPONSIVE FEATURE
 [List of Pre Grant Publications for class 277 subclass 934][List of Patents for class 277 subclass 934]934 SEAL SWELLS WHEN WET
[List of Pre Grant Publications for class 277 subclass 935][List of Patents for class 277 subclass 935]935 SEAL MADE OF A PARTICULAR MATERIAL
 
FOREIGN ART COLLECTIONS
 
      FOR000          CLASS-RELATED FOREIGN DOCUMENTS
Any foreign patents or non-patent literature from subclasses that have been reclassified have been transferred directly to FOR Collections listed below. These Collections contain ONLY foreign patents or non-patent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived.
  FOR100          RADIALLY CONTAINED PACKING WITH AXIALLY ACTING FOLLOWER (277/102)
      FOR101          Subclass FOR101 indent level is 1 Piston (277/103)
      FOR102          Subclass FOR102 indent level is 1 Sectional follower (277/104)
  FOR103          Subclass FOR103 indent level is 1 Bolted flange (277/105)
      FOR104          Subclass FOR104 indent level is 2 Spring biased flange (277/106)
      FOR105          Subclass FOR105 indent level is 1 With operating handle (277/107)
      FOR106          Subclass FOR106 indent level is 1 With tool engaging means (277/108)
      FOR107          Subclass FOR107 indent level is 1 Weight actuated (277/109)
  FOR108          Subclass FOR108 indent level is 1 Screw thimble (277/110)
      FOR109          Subclass FOR109 indent level is 2 With locking means (277/111)
      FOR110          Subclass FOR110 indent level is 1 Screw (277/112)
      FOR111          Subclass FOR111 indent level is 1 With operating mechanism (277/113)
      FOR112          Subclass FOR112 indent level is 1 Unidirectional movement (277/114)
  FOR113          Subclass FOR113 indent level is 1 Tapered follower or box (277/115)
      FOR114          Subclass FOR114 indent level is 2 Arcuate (277/116)
      FOR115          Subclass FOR115 indent level is 1 Axially related backup member raidally actuated by movement of follower (277/116.2)
  FOR116          Subclass FOR116 indent level is 1 Telescoping actuator (277/116.4)
      FOR117          Subclass FOR117 indent level is 2 With inserted sleeve expander (277/116.6)
      FOR118          Subclass FOR118 indent level is 2 Deflected packing (277/116.8)
  FOR119          Subclass FOR119 indent level is 1 Wedging surfaces (277/117)
      FOR120          Subclass FOR120 indent level is 2 Internal shell (277/118)
  FOR121          Subclass FOR121 indent level is 2 Split or segmental packing (277/119)
  FOR122          Subclass FOR122 indent level is 3 Expanding and contracting (277/120)
      FOR123          Subclass FOR123 indent level is 4 Elastomeric (277/121)
      FOR124          Subclass FOR124 indent level is 3 Contracting (277/122)
  FOR125          Subclass FOR125 indent level is 1 Plural packing elements (277/123)
      FOR126          Subclass FOR126 indent level is 2 Nested (277/124)
      FOR127          Subclass FOR127 indent level is 2 Diverse (277/125)
  FOR128          EXTERNALLY OPERATED ADJUSTMENT (277/126)
      FOR129          Subclass FOR129 indent level is 1 Fluid motor (277/127)
      FOR130          Subclass FOR130 indent level is 1 Circumferential band (277/128)
      FOR131          Subclass FOR131 indent level is 1 Acting along radius (277/129)
  FOR132          LATERAL ACCESS TO PACKING BOX (277/130)
  FOR133          Subclass FOR133 indent level is 1 With distinct closure (277/131)
      FOR134          Subclass FOR134 indent level is 2 Packing attached (277/132)
  FOR135          IMPELLER TYPE (277/133)
      FOR136          Subclass FOR136 indent level is 1 Axially acting(277/134)
      FOR137          LIQUID BARRIER (277/135)
  FOR138          WITH ANTIROTATION KEY OR ANCHOR (277/136)
      FOR139          Subclass FOR139 indent level is 1 Radial wall(277/137)
  FOR140          WITH DISTINCT RADIALLY ACTING BIAS(277/138)
  FOR141          Subclass FOR141 indent level is 1 Unitary packing spacer and bias means (277/139)
      FOR142          Subclass FOR142 indent level is 2 U-section (277/140)
      FOR143          Subclass FOR143 indent level is 1 Common bias for axially spaced packings (277/141)
      FOR144          Subclass FOR144 indent level is 1 With axially acting bias means (277/142)
  FOR145          Subclass FOR145 indent level is 1 With axially component (277/143)
      FOR148          Subclass FOR148 indent level is 1 With bias restrainer (277/146)
      FOR149          Subclass FOR149 indent level is 1 With adjustable loading means (277/147)
      FOR150          Subclass FOR150 indent level is 1 Individually biased segments (277/148)
  FOR151          Subclass FOR151 indent level is 1 Circumferentially spaced radially acting springs (277/149)
      FOR152          Subclass FOR152 indent level is 2 With radial pin or socket (277/150)
      FOR153          Subclass FOR153 indent level is 1 Circumferential thrust (277/151)
  FOR154          Subclass FOR154 indent level is 1 Axial lip or boss (277/152)
      FOR155          Subclass FOR155 indent level is 2 Exposed coil spring (277/153)
      FOR156          Subclass FOR156 indent level is 1 Interfitted segments (277/154)
      FOR157          Subclass FOR157 indent level is 1 With bridging segments (277/155)
      FOR158          Subclass FOR158 indent level is 1 Break joint (277/156)
  FOR159          Subclass FOR159 indent level is 1 Periphery engaging spring (277/157)
  FOR160          Subclass FOR160 indent level is 2 Incompatible shapes (277/158)
      FOR161          Subclass FOR161 indent level is 3 Radially extending tongues (277/159)
      FOR162          Subclass FOR162 indent level is 3 Wave or undulate (277/160)
      FOR163          Subclass FOR163 indent level is 3 Polygonal (277/161)
      FOR164          Subclass FOR164 indent level is 2 Open-end (277/162)
      FOR165          Subclass FOR165 indent level is 2 Spiral (277/163)
      FOR166          Subclass FOR166 indent level is 1 Embedded or enclosed spring (277/164)
      FOR167          Subclass FOR167 indent level is 1 Nonmetallic (277/165)
      FOR168          ANCHOR EXTENDING THROUGH OR INTERFITTED WITH PACKING (277/166)
      FOR169          HELICAL SEAT (277/167)
      FOR170          SERIALLY ARRANGED, SEPARATELY SEATED OR ANCHORED PACKING MEMBERS (277/167.3)
      FOR171          SINGLE SEAT FORMED BY OPPOSED RECESSES IN PLURAL MEMBERS (277/167.5)
  FOR172          LATITUDINALLY STEPPED OR TAPERED SEAT (277/168)
      FOR173          Subclass FOR173 indent level is 1 Arcuate wall (277/169)
  FOR174          Subclass FOR174 indent level is 1 Oblique wall (277/170)
  FOR175          Subclass FOR175 indent level is 2 Plural (277/171)
      FOR176          Subclass FOR176 indent level is 3 Parallel (277/172)
  FOR177          FLOATING PACKING MEMBER (277/173)
  FOR178          Subclass FOR178 indent level is 1 Radially translatable (277/174)
      FOR179          Subclass FOR179 indent level is 2 Axially spring pressed (277/175)
      FOR180          Subclass FOR180 indent level is 1 Additional member (277/176)
      FOR181          Subclass FOR181 indent level is 1 Elastomeric (277/177)
      FOR182          INTERFITTING WITH RADIALLY PROJECTING FLANGE (277/178)
      FOR183          EMBEDDED REENFORCEMENT OPPOSING TAPERED MOUNTED SURFACE (277/179)
      FOR184          WITH COMPRESSION STOP (277/180)
  FOR185          PACKING ATTACHED RETAINER (277/181)
  FOR186          Subclass FOR186 indent level is 1 Peripheral shell (277/182)
      FOR187          Subclass FOR187 indent level is 2 With radial mounting flange (277/183)
      FOR188          Subclass FOR188 indent level is 2 Channel-shaped (277/184)
      FOR189          Subclass FOR189 indent level is 1 Plural at axially opposed ends (277/185)
      FOR190          Subclass FOR190 indent level is 1 Resilient (277/186)
      FOR191          PACKING CHAMBER OR SEAT WITH SEPARABLE END WALL (277/187)
  FOR192          WITH AXIALLY RELATED BACKING OR RETAINING MEMBER (277/188 R)
      FOR193          Subclass FOR193 indent level is 1 With anti-extrusion rings (277/188 A)
      FOR194          WITH ANCHOR OR RETAINER (277/189)
      FOR195          COMPOSITE SEAT (277/189.5)
  FOR196          WEDGING PORTIONS (277/190)
      FOR197          Subclass FOR197 indent level is 1 Enclosed (277/191)
  FOR198          SEGMENTAL (277/192)
  FOR199          Subclass FOR199 indent level is 1 Axially related segments (277/193)
      FOR200          Subclass FOR200 indent level is 2 L-shaped (277/194)
      FOR201          Subclass FOR201 indent level is 2 With radially related segment (277/195)
      FOR202          Subclass FOR202 indent level is 2 Coiled or corrugated segment (277/196)
      FOR203          Subclass FOR203 indent level is 2 Diametrically opposed splits (277/197)
      FOR204          Subclass FOR204 indent level is 1 Concentric segments (277/198)
      FOR205          Subclass FOR205 indent level is 1 Interfitting segments (277/199)
      FOR206          AXIALLY SPACED FLANGES WITH CORRUGATED CONNECTING WEB (277/200)
  FOR207          ANNULUS WITH DUCT OR PASSAGEWAY (277/201)
      FOR208          Subclass FOR208 indent level is 1 Elongated (277/202)
      FOR209          HELICAL (277/203)
      FOR210          VOLUTE (277/204)
  FOR211          FLEXIBLE U- OR V-CUP (277/205)
  FOR212          Subclass FOR212 indent level is 1 Radially facing (277/206 R)
      FOR213          Subclass FOR213 indent level is 2 X-shape (277/206 A)
  FOR214          RIBBED CONTACT SURFACE (277/207 R)
  FOR215          Subclass FOR215 indent level is 1 Axially spaced (277/208)
  FOR216          Subclass FOR216 indent level is 2 Opposite surfaces (277/209)
      FOR217          Subclass FOR217 indent level is 3 Line contact (277/210)
      FOR218          Subclass FOR218 indent level is 1 Opposite surfaces (277/211)
      FOR219          Subclass FOR219 indent level is 1 Pipe joints or connections (277/207 A)
  FOR220          FLEXIBLE CUP OR FLANGE TYP(277/212R)
      FOR221          Subclass FOR221 indent level is 1 Flexible cup type (277/212 C)
      FOR222          Subclass FOR222 indent level is 1 Flange (277/212 F)
      FOR223          Subclass FOR223 indent level is 1 Flexible boot (277/212 FB)
      FOR224          CORRUGATED CONTACT SURFACE (277/213)
      FOR225          CIRCUMFERENTIAL GROOVE IN PERIPHERAL SURFACE (277/214)
      FOR226          WITH SPACED POCKETS, GROOVES, OR RECESSES (277/215)
  FOR227          SPLIT ANNULUS (227/216)
      FOR228          Subclass FOR228 indent level is 1 Variable radius (277/217)
  FOR229          Subclass FOR229 indent level is 1 With separate gap or bridging piece (277/218)
      FOR230          Subclass FOR230 indent level is 2 End secured (277/219)
  FOR231          Subclass FOR231 indent level is 1 With joining structure (277/220)
  FOR234          Subclass FOR234 indent level is 1 With insert (277/223)
      FOR235          Subclass FOR235 indent level is 2 Hard material (277/224)
      FOR236          WITH INTERMEDIATE RADIAL PERIPHERAL FLANGE (277/225)
      FOR237          FLUENT OR VACUUM CORE (277/226)
  FOR238          COMPOSITE (277/227)
      FOR239          Subclass FOR239 indent level is 1 Elastomeric core (277/228)
  FOR240          Subclass FOR240 indent level is 1 Distinct sheath (277/229)
      FOR241          Subclass FOR241 indent level is 2 Woven or braided strands (277/230)
  FOR242          Subclass FOR242 indent level is 1 Reentrant contact surface (277/231)
      FOR243          Subclass FOR243 indent level is 2 Enclosing plural plies (277/232)
  FOR244          Subclass FOR244 indent level is 1 Plural planar or conical plies (277/233)
      FOR245          Subclass FOR245 indent level is 2 Metal faced (277/234)
  FOR246          Subclass FOR246 indent level is 1 Including metal (277/235 R)
      FOR247          Subclass FOR247 indent level is 2 Planar coating (277/235 A)
      FOR248          Subclass FOR248 indent level is 2 Engine gasket (277/235 B)
      FOR249          METALLIC (277/236)
  FOR250          MISCELLANEOUS (277/237 R)
      FOR251          Subclass FOR251 indent level is 1 Dust guard (277/237 A)