| Class 251 | VALVES AND VALVE ACTUATION |
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![[List of Pre Grant Publications for class 251 subclass 1.1]](../as.gif) | ![[List of Patents for class 251 subclass 1.1]](../ps.gif) | 1.1 | BLOW-OUT PREVENTERS (I.E., COOPERATING SEGMENTS OF ANNULUS) |
| | 3 | PATTERN TRACER CONTROLLED ACTUATOR |
| | 4 | TUBE COMPRESSORS |
| | 5 |  Fluid pressure actuated |
| | 6 | Roller tube contacting element |
| | 7 | Perpendicularly reciprocating tube contacting element |
| | 9 | Pivoting tube contacting element |
| | 11 | HEAT OR BUOYANCY MOTOR ACTUATED |
| | 12 | FLUID ACTUATED OR RETARDED |
| | 14 | Fluid and non-fluid actuators |
| | 15 | Compulsory cut-off after flow period |
| | 16 |  Serial main line cut-off and manual valves (e.g., hydraulic "fuses") |
| | 19 | Auxiliary pilot valve overrides a first pilot valve |
| | 20 | Forced return of actuator to cut-off position |
| | 21 | Actuator connection released on opening of cut-off valve |
| | 22 | Control fluid released into closed build-up chamber |
| | 23 | Dashpot interconnects actuator and valve |
| | 24 | Venturi or line flow effect assisted |
| | 25 | Pilot or servo type motor |
| | 26 | Alternative pressure sources or pilot valve |
| | 27 | Servo failure responsive control of main valve |
| | 28 | Fluid actuated pilot valve |
| | 30.01 | Electrically actuated pilot valve |
| | 31 | Double or oppositely acting motor units |
| | 32 | Latched pilot valve |
| | 33 | Choked pressure type servo motor |
| | 34 |  With reverse flow prevenging (nonsiphoning) |
| | 35 | Variable choke passage according to valve position |
| | 36 | With separate dashpot or choked fluid retarding chamber |
| | 37 | With choke or restrictor in main line |
| | 38 | Pilot valve seated in motor or valve element |
| | 41 | Remote pilot valve actuation |
| | 42 | Adjustable opening limit for main valve |
| | 43 | Main valve biased open by line pressure |
| | 47 | With separate dashpot or choked fluid retarder |
| | 48 | Dashpot or fluid controlled retarder or timer |
| | 49 | Latch or trip releasing |
| | 50 | Line pressure connected dashpot or choke chamber |
| | 53 | Line connected open accumulating chamber |
| | 54 | Closed fluid circuit dashpot or choke chamber |
| | 55 | With choke by-pass or relief means |
| | 56 | Plural operations (e.g., lifting and rotating rotary valve) |
| | 57 | Fluid link or column actuator |
| | 58 | With mechanical movement between actuator and valve |
| | 59 | Rotary or oscillatory motor |
| | 60 | With adjustable limit stop for actuator |
| | 61 | Flexible wall expansible chamber reciprocating valve actuator |
| | 62 | Piston type expansible chamber reciprocating valve actuator |
| | 64 | WITH NON-FLUID RETARDER |
| | 65 | PERMANENT OR CONSTANTLY ENERGIZED MAGNET ACTUATOR |
| | 66 | BIASED TRIP |
| | 67 | With second diverse control |
| | 68 | Electrical trip actuation |
| | 72 | Weight biased trip |
| | 73 | Fluid pressure trip actuation |
| | 74 | Mechanical movement trip actuation |
| | 75 | WITH SNAP ACTION |
| | 76 | IMPACT TYPE ACTUATOR |
| | 77 | LOST MOTION BETWEEN ACTUATOR AND VALVE |
| | 84 | VALVE HEAD MOVABLY CONNECTED FOR ACCOMMODATION TO SEAT |
| | 85 | With yieldable connection |
| | 86 | With universal connection |
| | 87 | With single plane swing pivoted connection |
| | 88 | Rotatable only |
| | 89 | WITH MEANS FOR BLOCKING OR DISABLING ACTUATOR |
| | 89.5 | Actuator, or blocking means, includes flow path joint |
| | 90 | Attachments |
| | 94 | Fluid pressure biased latch |
| | 95 | Released by non-valving actuator motion |
| | 101 | Latch manipulator mounted on handle or stem |
| | 102 | Constrained linear motion |
| | 103 | With pivoted latch |
| | 104 | With latch rigidly associated with manipulator |
| | 106 | With transversely movable latch |
| | 107 | With pivoted latch |
| | 110 | With reciprocating latch |
| | 111 | Latch manipulator mounted on valve body |
| | 117 | WITH RESTRICTOR IN PARALLEL TO MAIN VALVE |
| | 118 | WITH MATERIAL GUIDE OR RESTRICTOR |
| | 119 | Aspirated stem drain |
| | 120 | Movable or resilient guide or restrictor |
| | 123 | Valve at point of greatest restriction |
| | 125 | Drop forming restrictor |
| | 126 | Spiral guide or spiral restrictor |
| | 127 | Baffle or zigzag flow restrictor |
| | 128 | WITH DETACHABLE ACTUATOR AND MEANS TO PREVENT LEAKAGE WHEN ACTUATOR IS DETACHED |
| | 129.01 | ELECTRICALLY ACTUATED VALVE |
| | 129.02 | With means to bias valve open |
| | 129.03 | With nonelectrical actuator |
| | 129.04 | Remote or follow-up control system for electrical actuator |
| | 129.05 | Having means to produce digital pulses |
| | 129.06 | Having element dimensionally responsive to field |
| | 129.07 | Balanced valve |
| | 129.08 | Having means to produce proportional flow |
| | 129.09 | Solenoid having plural coils |
| | 129.11 | Rotary electric actuator |
| | 129.14 | Freely rotatable ball valve |
| | 129.15 | Including solenoid |
| | 129.16 | Having plate-shaped armature |
| | 129.17 | Having diaphragm between coil and opening controlled |
| | 129.18 | With means to adjust stroke of armature |
| | 129.19 | Lost motion between valve and valve actuator |
| | 129.2 | Mechanical movement between valve and solenoid |
| | 129.21 | Coil surrounds valve port or flow line |
| | 129.22 | Solenoid within flow line |
| | 142 | WITH CORRELATED FLOW PATH |
| | 149 | Valve operated by joining flow path sections |
| | 149.8 | Valve operated by motion of flow path |
| | 149.9 | Flow path joint interlocked with valve or actuator |
| | 144 | Tank |
| | 145 | Pipe side |
| | 147 | Pipe end (terminal valve) |
| | 148 | Pipe coupling or union |
| | 150 | Flexible or expansible |
| | 151 | Non-rotatable conduit coupling |
| | 152 | Valve seat and coupling element removable as a unit |
| | 143 | With mounting or support |
| | 153 | With particular outlet or inlet |
| | 157 | WITH MEANS TO INCREASE HEAD AND SEAT CONTACT PRESSURE |
| | 158 | With positive reduction |
| | 159 | Seat pressed to valve |
| | 160 | Rotary valve |
| | 167 | Bifaced |
| | 170 | Seat pressed to valve |
| | 175 | Fluid pressure |
| | 176 | Spring |
| | 187 | Separate actuators or actuator motion |
| | 190 | Piston |
| | 192 | Rotary valve |
| | 193 | Gate valve |
| | 205 | WITH SELECTIVE FLOW REGULATION |
| | 210 | SEQUENTIAL OPENING OR CLOSING OF SERIAL PORTS IN SINGLE FLOW LINE (E.G., ANTI-SCORING) |
| | 211 | SERIAL ALTERNATELY CLOSED PORTS |
| | 212 | RELATIVELY MOVABLE VALVE ELEMENTS FORM SINGLE PORT CLOSURE (E.G., IRIS DIAPHRAGM) |
| | 213 | MECHANICAL MOVEMENT ACTUATOR |
| | 214 | Particularly packed or sealed |
| | 215 | Plural motions of valve |
| | 216 | Screw threads in flow path |
| | 217 | Valve head between actuator and screw |
| | 218 | Encased |
| | 225 | Threads in removable sleeve |
| | 226 | Biased |
| | 228 | With pivoted valves |
| | 229 | Plural dissimilar mechanical movements |
| | 230 | Ratchet |
| | 231 | Lever |
| | 232 | Train (plural serial) |
| | 233 | Leverage variable during operation |
| | 234 | Adjustable leverage |
| | 235 | Swiveled |
| | 236 | Biased |
| | 248 | Gear |
| | 251 | Cam |
| | 264 | Screw |
| | 265 | Plural thread |
| | 266 | Non-reciprocating actuator |
| | 273 | Internal thread |
| | 274 | Encased |
| | 277 | Biased |
| | 279 | Linkage |
| | 281 | BALANCED VALVES |
| | 284 | LIMIT STOP |
| | 289 | VALVE ACTUABLE FROM PLURAL POSITIONS |
| | 290 | PLURAL SELECTIVE NEUTRAL POSITIONS FOR VALVE OR ACTUATOR |
| | 291 | DETACHABLE ACTUATOR |
| | 293 | EXTENSION FOR ACTUATOR |
| | 294 | FLEXIBLE ACTUATOR (E.G., BOWDEN WIRE; CHAIN) |
| | 295 | PEDAL ACTUATOR |
| | 296 | PLURAL MOTIONS OF ACTUATOR |
| | 297 | WITH FRICTION DETENT |
| | 298 | PIVOTED VALVES |
| | 304 | ROTARY VALVES |
| | 305 | Butterfly |
| | 309 | Plug |
| | 313 | Biased |
| | 315.01 | Ball valve |
| | 315.02 | Having a particular hardness (i.e., durometric property) |
| | 315.03 | Of specific material |
| | 315.06 | Having a swinging actuator |
| | 315.07 | Eccentric seating |
| | 315.08 | Including trunnion opposite axially extending actuating means |
| | 315.1 | Housing construction |
| | 315.11 | Head removable perpendicular to flow passage |
| | 315.13 | Assembled around the head |
| | 315.14 | Head removable along one side of flow passage |
| | 315.15 | Having inseparable head |
| | 315.16 | Ball construction |
| | 314 | Seat or interface seal |
| | 318 | RECIPROCATING VALVE |
| | 319 | Push or pull operator |
| | 324 | Piston |
| | 326 | Gate |
| | 330 | Actuator controlled stem seal |
| | 331 | Diaphragm |
| | 332 | Diverse material seal at valve interface |
| | 333 | Particular head and seat cooperation |
| | 335.1 | HERMETIC FLEXIBLE WALL SEAL FOR ACTUATOR |
| | 336 | BIASED VALVE |
| | 339 | VALVE ACTUATOR EXTENDING THROUGH FLUID INLET OR OUTLET |
| | 340 | VALVE ACTUATOR SURROUNDING PIPE, INLET OR OUTLET |
| | 341 | VALVE ACTUATOR IS VALVE CASING OR EXTENSION THEREOF |
| | 342 | Jointed or flexible wall |
| | 343 | Sleeve valve |
| | 346 | Plural motions of valve |
| | 347 | Reciprocating valve |
| | 348 | Biased valve |
| | 349 | VALVE ACTUATOR IS INLET OR OUTLET |
| | 355 | WITH ACTUATION LUBRICATING MEANS |
| | 356 | VALVE |
| | 357 | Removable seat engaging element |
| | 358 | Reinforced flexible material |
| | 359 | Seats |
| | 366 | Bodies |
| | 368 | Materials |
| | 369 | MISCELLANEOUS |
| CROSS-REFERENCE ART COLLECTIONS | ||
| | 900 | VALVES WITH O-RINGS |
| | 901 | CURTAIN TYPE VALVES |
| | 902 | SPRINGS EMPLOYED AS VALVES |
| | 903 | NEEDLE VALVES |
| | 904 | SNAP FIT PLUG VALVES |
| | 905 | MOVABLE COIL ELECTRICAL ACTUATOR (E.G., VOICE COIL) |
| FOREIGN ART COLLECTIONS | ||
| FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |