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| Class 417 | PUMPS |
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![[List of Pre Grant Publications for class 417 subclass 1]](../as.gif) | ![[List of Patents for class 417 subclass 1]](../ps.gif) | 1 | CONDITION RESPONSIVE CONTROL OF PUMP DRIVE MOTOR |
| | 2 |  Plural pumps having separate drive motors, supply sources, or delivery destinations |
| | 9 | By stopping pump in response to leakage into or from system |
| | 10 | By controlling starter motor for internal combustion engine |
| | 11 | By controlling free piston internal combustion engine |
| | 12 | Having timer or delay means |
| | 13 | Responsive to pump lubricant, sealant, or coolant condition |
| | 14 | Having ambient condition responsive means |
| | 15 | With control of pump drive transmission |
| | 16 | With plural separate drive motors for single pump unit |
| | 17 | With plural separate drive motor controlling elements |
| | 18 | Single motor control element responsive to means sensing diverse conditions |
| | 19 |  Sensing both inlet and outlet conditions |
| | 20 | One condition is rate of flow to or from pump |
| | 21 | One is motive fluid condition of fluid drive motor |
| | 22 | One condition is speed of pump |
| | 25 | Relatively movable elements sensing same system pressure for single control element |
| | 26 | With condition responsive control of pump fluid valve |
| | 27 | Having independent means for delaying valve actuation |
| | 28 | Fluid and motor controls have common sensing element |
| | 29 | Fluid and motor controls separately responsive to diverse conditions |
| | 32 | Responsive to pump or pump fluid temperature |
| | 33 | Pump stop control means requiring manual reset |
| | 34 | By controlling internal combustion drive engine |
| | 35 | By controlling wind motor in response to liquid accumulation |
| | 36 | Responsive to accumulation of pumped liquid in receiver |
| | 37 | By movable liquid receptacle |
| | 38 | By liquid pressure sensor |
| | 39 | With motive fluid supply communicating with liquid receiver |
| | 40 | By float |
| | 42 | In response to pump speed |
| | 43 | Responsive to change in rate of pump fluid flow |
| | 44.1 | By control of electric or magnetic drive motor |
| | 45 | By changing electrical characteristic of motor or motor circuit |
| | 44.2 | Responsive to pump fluid pressure |
| | 44.4 |  Low pressure stops motor from turning on pump |
| | 44.5 | Mercury switch |
| | 44.6 | Dial-type sensor |
| | 44.7 | Bellow-type sensor |
| | 44.8 | Piston-type sensor |
| | 44.9 | Diaphragm |
| | 44.3 | Inlet pressure |
| | 44.11 | Responsive to change in electrical operating characteristic |
| | 46 | By controlling drive motor motive fluid |
| | 48 | ELECTRICAL OR GETTER TYPE |
| | 52 | EXPANSION AND CONTRACTION OF PUMP FLUID |
| | 53 | PROCESSES |
| | 56 | DRILLED WELL FREE PISTON-TYPE PUMP |
| | 57 | Having condition or position responsive control of pump discharge flow path |
| | 58 | Having condition or position responsive control of motive fluid supply |
| | 59 | Radially expansible piston portion controls pump and motor chamber intercommunication |
| | 60 | Mechanically actuated valve carried by piston |
| | 61 | BUOYANTLY SUPPORTED |
| | 62 | ALTERNATE SERIES OR PARALLEL OPERATION OF PLURAL PUMPS |
| | 63 | WITH SIGNAL, INDICATOR, OR INSPECTION MEANS |
| | 64 | GAS PRESSURE EXCHANGE USING ROTARY CELLULAR CONVEYOR |
| | 65 | ONE FLUID PUMPED BY CONTACT OR ENTRAINMENT WITH ANOTHER |
| | 66 | Contact or entrainment within rotary impeller |
| | 67 | Passage in impeller shaft for pumped or motive fluid |
| | 68 | Liquid ring |
| | 70 | Peripheral motive fluid inlet |
| | 71 | Axial inlet for pumped fluid |
| | 73 | By ignition of motive fluid |
| | 76 | Jet pump with motive fluid generating pump |
| | 77 | Recirculation of separated motive fluid |
| | 78 | Entrainment at exit of impeller |
| | 79 | Jet delivers back to generating pump |
| | 84 | Rotary nonexpansible chamber-type generating pump |
| | 85 | Diverse pumps |
| | 92 | Liquid piston |
| | 93 | Moving contracting chamber |
| | 94 | Helical chamber |
| | 95 | Movement of chamber cyclically controls flow of liquid into chamber for cyclic operation |
| | 96 | Liquid supporting chambers move liquid to pump fluid |
| | 97 | Relatively movable chambers |
| | 98 | Reciprocating |
| | 99 | Mercury piston |
| | 100 | Tide or wave |
| | 101 | Piston level responsive control for cyclic operation |
| | 103 | Plural chambers |
| | 104 | Momentum piston |
| | 105 | By condensation of motive fluid |
| | 108 | Aerated column |
| | 109 | Valved gas inlet |
| | 110 | With pumped fluid velocity or flow responsive valve operating means |
| | 111 | Plural serially actuated valves |
| | 112 | With flexible pressure responsive sensing element (i.e., bellows, diaphragm, etc.) |
| | 114 | With pilot valve |
| | 115 | Valve member actuated responsive to absolute gaseous motive fluid pressure or flow rate |
| | 116 | Controlled by means responsive to liquid level accumulation in column |
| | 117 | Valve biased open by static pressure of pumped fluid |
| | 118 | Liquid pumped by supplying or exhausting gaseous motive fluid to or from pumping chamber |
| | 119 | Motive fluid pumped by contact with a liquid |
| | 120 | With condition responsive control of motive fluid vacuum or pressure generating means |
| | 121 | Serially connected pumping chambers |
| | 122 | Alternate pumping from plural pumping chambers |
| | 126 | With float actuated control means |
| | 127 | Plural floats in single pumping chamber |
| | 128 | With intermediate pilot valve |
| | 129 | With intermediate electrical actuating means |
| | 130 | Control of motive fluid inlet (e.g., atmosphere, etc.) |
| | 134 | Control of motive fluid outlet |
| | 137 | Cyclic pumping |
| | 138 | Control by liquid level sensing means |
| | 139 | Control by condition of pumped fluid |
| | 140 |  Movable pumping chamber |
| | 141 | Responsive to flow of pumped fluid |
| | 142 | Responsive to pumped fluid pressure |
| | 143 | Motive fluid supply or exhaust valve responsive to motive fluid pressure |
| | 144 | Correlated motive fluid valve and pressure or vacuum generating means |
| | 145 | Correlated supply - exhaust of motive fluid or vacuum generating means |
| | 148 | With vacuum generator |
| | 150 | Gravity flow motive fluid |
| | 151 | Jet |
| | 152 | Vapor condensation vacuum diffusion type |
| | 153 | With cooling or heat insulation means |
| | 154 | Vertical stack from generator with reverse flow nozzle |
| | 155 | Flue type |
| | 158 | With motive fluid generator |
| | 160 | Cleaning by separate fluid or diverted motive fluid |
| | 161 | Radial disc-type motive fluid jet |
| | 162 | Interrelated overflow and motive fluid valves |
| | 163 | Successive introduction of motive fluid |
| | 164 | With interstage cooling |
| | 165 | Individually controlled motive fluid flows |
| | 167 | Central and peripheral motive fluid supply |
| | 168 | One motive fluid flow surrounds nozzle tube of another |
| | 169 | Laterally spaced parallel motive fluid flows |
| | 170 | In-line motive fluid flows |
| | 171 | Tangential motive fluid supply (i.e., vortex type) |
| | 172 | Concentric reverse flow motive fluid and discharge conduits |
| | 173 | With cooling |
| | 174 | Successive entrainment of pumped fluid |
| | 175 | With priming or overflow removal jet |
| | 176 | Parallel entrainments with separate combining tubes |
| | 177 | Annular motive fluid stream entrains pumped fluid outside and inside |
| | 178 | Selectively usable flow confining members (e.g., nozzles, combining tubes, etc.) |
| | 179 | Plural motive fluid jets or sources for single entrainment |
| | 181 | Faucet or flexible hose attached |
| | 182 | Regulation |
| | 182.5 | Liquid level responsive |
| | 183 | By position of nozzle relative to combining tube |
| | 185 | With main line downstream control |
| | 186 | By bypassing motive fluid from nozzle |
| | 187 | By controlling motive fluid |
| | 190 | Pumped fluid inlet valve |
| | 192 | Pressure controlled overflow |
| | 194 | With means to whirl pumped fluid |
| | 195 | Specific material |
| | 196 | Expressed mathematically or dimensionally |
| | 197 | Peripheral motive fluid supply |
| | 198 | Specific motive fluid nozzle |
| | 199.1 | DIVERSE PUMPS |
| | 199.2 | Priming and venting |
| | 200 | Priming with liquid level responsive control |
| | 201 | Including rotary nonexpansible chamber type |
| | 204 | Moving partition or cylinder of rotary pump forms or actuates reciprocating pump |
| | 205 | Series |
| | 207 | BY HEATING OF PUMPED FLUID |
| | 210 | PUMP FLUID BIASED OVERCENTER LOAD EQUALIZER |
| | 211 | INERTIA-TYPE PUMPING MEMBER OR DRIVE MEANS |
| | 211.5 | LIQUID LEVEL RESPONSIVE CONTROL OF DISPLACEMENT, VOLUMETRIC CAPACITY, OR DRIVE TRANSMISSION |
| | 212 | CONDITION RESPONSIVE CONTROL OF DRIVE TRANSMISSION OR PUMP DISPLACEMENT |
| | 213 | Having condition responsive pumped fluid control |
| | 214 | Having means to hold or resist movement of pumping element |
| | 215 | By changing phasing of plural pistons in single chamber |
| | 216 | Plural pumps with individual or relative control |
| | 217 | Reversible flow pump |
| | 218 | Adjustable cam or linkage |
| | 223 | Disconnectable drive element (e.g., clutch, belt, shifter, etc.) |
| | 225 | INTENSIFIER |
| | 228 | WITH CONDITION RESPONSIVE CONTROL OF COOLANT OR LUBRICANT |
| | 229 | OPERATED BY ART DEVICE |
| | 234 | AMBULANT, BODY SUPPORTED, OR WITH CARRYING HANDLE |
| | 236 | CONVERTIBLE TO APPARATUS OF A DIFFERENT CLASS |
| | 238 | CHANGEABLE BY ASSEMBLY OR DISASSEMBLY |
| | 240 | INERTIA LIQUID PISTON (E.G., MOMENTUM, ETC.) |
| | 242 | POSITION RESPONSIVE BYPASS BETWEEN PLURAL PUMP CHAMBERS |
| | 243 | WITH INTERCOOLER |
| | 244 | SUCCESSIVE STAGES |
| | 245 | Fluid motor for one stage supplied from another stage |
| | 246 | Stages driven by relatively movable motor working members |
| | 248 | Parallel stages to or from single stage |
| | 249 | Prior stage delivers to atmospheric chamber |
| | 250 | With interstage intake or additional inlet to latter stage |
| | 251 | With interstage discharge or additional discharge from former stage |
| | 253 | Condition responsive control of fluid |
| | 254 | Reciprocating rigid stages |
| | 255 | Crankcase forms stage or interstage flow path |
| | 256 | Stages comprise oppositely moving valved pumping members |
| | 258 | Reciprocating cylinder and piston |
| | 259 | Including valved piston |
| | 260 | Piston forms or carries inlet and outlet valve for one stage |
| | 261 | Serial interstage distributors in piston |
| | 262 | Valve in piston is first stage inlet valve |
| | 263 | With additional pumping member in parallel flow path |
| | 264 | Fluid motor driven |
| | 265 | Relatively movable |
| | 266 | Three or more |
| | 267 | Series double acting |
| | 268 | Unidirectionally acting rigidly connected pumping members |
| | 269 | THREE OR MORE CYLINDERS ARRANGED IN PARALLEL, RADIAL, OR CONICAL RELATIONSHIP WITH ROTARY TRANSMISSION AXIS |
| | 270 | Condition responsive fluid control |
| | 271 | Motor driven |
| | 272 | Continuous unidirectional fluid bias on reciprocating member |
| | 273 | Radial cylinders |
| | 274 | CONDITION RESPONSIVE VARIABLE VOLUMETRIC CAPACITY EXPANSIBLE CHAMBER PUMP (I.E., CLEARANCE CONTROL) |
| | 278 | EXTERNAL CONDITION RESPONSIVE PUMPED FLUID CONTROL |
| | 279 | WITH CONDITION RESPONSIVE PUMPED FLUID CONTROL |
| | 280 | Responsive to pump created drive motor condition |
| | 281 | Lubricant condition responsive |
| | 282 | Plural separate sensing means for a single fluid controller |
| | 283 | Bypass or relief valve controls venting by movable pump chamber part |
| | 284 | Bypass or relief valve carried by movable pumping member |
| | 285 | Valve passage directly connecting concurrently contracting and expanding nonrotary pump chambers |
| | 286 | Plural pump units with individual or relative control |
| | 289 | Variable cutoff or pumping member controlled port |
| | 290 | Having timer or delay means for fluid controller |
| | 291 | Reversibly driven pump having bypass active in either flow direction |
| | 292 | Pumped fluid temperature responsive |
| | 293 | Driven pump part speed responsive |
| | 295 | Inlet throttle or stop valve |
| | 296 | Bypass or relief valve part carried by or carries distributor part |
| | 297 | Expansible chamber pump distributor operation modified |
| | 299 | Normally open bypass or relief passage closed by increased pressure or flow |
| | 300 | Fluid flow rate responsive |
| | 301 | Inlet pressure increase opens bypass from pump inlet to discharge |
| | 302 | Plural paths having individual condition responsive control means |
| | 305 | Manual actuation of condition responsive valve |
| | 306 | Pump inlet or pump chamber vented to ambient (e.g., vacuum breaker) |
| | 307 | Pressure responsive relief or bypass valve |
| | 312 | WITH MUFFLER ACTING ON PUMP FLUID |
| | 313 | COMBINED |
| | 314 | SINGLE ACTING CHANGEABLE TO OR FROM DOUBLE ACTING |
| | 315 | REVERSE FLOW WITH UNIDIRECTIONAL DRIVE OR UNIDIRECTIONAL FLOW WITH REVERSE DRIVE |
| | 316 | CORRELATED PUMP AND MOTOR OR CLUTCH CONTROL |
| | 319 | INCLUDING DISENGAGEABLE ROTARY OR FRANGIBLE DRIVE CONNECTION |
| | 320 | SERIALLY FORMED PUMPING CHAMBERS (E.G., ENDLESS) |
| | 321 | MOTOR DRIVEN |
| | 322 | Magnetostrictive chamber |
| | 323 | Pump motor or starter driven by pump fluid |
| | 324 | Pump operated as motor to start prime mover drive |
| | 325 | Reversely rotated for starting |
| | 326 | Including means for selectively varying motor speed or rotary motor direction |
| | 327 | Reaction motor |
| | 328 | Spring or weight motor |
| | 330 | Tide or wave motor |
| | 334 | Fluid current motor |
| | 337 | Buoyant motor |
| | 338 | Relatively movable pumping members driven by relatively movable working members |
| | 339 | Nonrotary pumping and fluid motor working members |
| | 340 | Common expansible chamber for oppositely movable working members |
| | 342 | Including closed fluid interconnection between working members |
| | 343 | Including mechanical interconnection to cause relative motion |
| | 344 | Position of one working member controls motive fluid valve for another |
| | 345 | Control by single member responsive to position of each of plural working members |
| | 346 | Independently operated valve for each working member |
| | 347 | Single member controls motive fluid for each working member |
| | 348 | Common rotary pumping and fluid motor working member |
| | 349 | Common pump and motor chamber |
| | 350 | Motor rotor intermediate coaxial pump rotors |
| | 351 | Pump rotor intermediate coaxial motor rotors |
| | 352 | Motor within rotary pumping member |
| | 355 | Pump within rotary working member |
| | 357 | Pump fluid communicates with sealed chamber containing armature |
| | 358 | Pump - motor unit raised in vertical conduit by pressure fluid applied below unit |
| | 359 | Adjustable motor and pump rotor unit or relatively adjustable aligned pump and motor rotary shafts |
| | 360 | Including means for facilitating assembly or disassembly of pump to or from motor or fixed support |
| | 361 | Pump and motor unitarily adjustable relative to fixed support |
| | 362 | Pump and motor interconnected by endless flexible transmission element |
| | 363 | Resiliently mounted pump or motor |
| | 364 | Internal-combustion engine |
| | 365 | Axial thrust balancing means for rotary pump and motor |
| | 366 | Including means utilizing pump fluid for augmenting cooling, lubricating, sealing, or cleaning of motor |
| | 367 | Heat exchange means between pump fluid and secondary motor contacting fluid |
| | 368 | Including additional means for motivating fluid flow to or from motor (e.g., auxiliary pump, pump fluid induced flow path, etc.) |
| | 369 | Pump fluid directed to motor via downstream branched flow path |
| | 371 | Pump fluid flows serially from motor through pump |
| | 372 | Interrelated or common lubricating or cooling means for pump and motor |
| | 373 | With means to prevent heat transfer between pump and motor |
| | 374 | Including manual, mechanical, or diverse drive |
| | 375 | Fluid motor |
| | 376 | Steam motor discharge into pump fluid |
| | 377 | Serial flow fluid from pumping chamber through motor working chamber |
| | 379 | With motive fluid generator |
| | 380 | Internal-combustion engine |
| | 381 | Combustion products generator for motor |
| | 382 | Plural pumping members; one additionally supplying motive fluid for second |
| | 383 | Pulsator or fluid link |
| | 390 | Fluid pump |
| | 391 | Motor discharge into or upstream of pumping chamber |
| | 392 | Common pumping and motor working member |
| | 396 | Rectilinearly reciprocating motor working members coaxial with intermediate unitary pumping member |
| | 397 | Rectilinearly reciprocating pumping members coaxial with intermediate unitary motor working member |
| | 398 | Rectilinearly reciprocating cylinder and piston-type motor |
| | 405 | Rotary motor |
| | 410.1 | Electric or magnetic motor |
| | 411 | Including electric power generating or storage means |
| | 412 | Collapsible wall pump |
| | 414 | Internal - external pressure balancer |
| | 415 | Reciprocating rigid pumping member |
| | 420 | Pump magnetically coupled to rotary drive |
| | 421 | Trapped air motor seal (i.e., diving bell type) |
| | 422 | Sealed service conduit |
| | 423.1 | Rotary motor and rotary nonexpansible chamber pump |
| | 423.2 | Vacuum cleaner |
| | 423.3 | Submersible type |
| | 423.4 | Turbomolecular pump |
| | 423.5 | Plural units |
| | 423.6 | Having nonflexible means to transmit power between motor shaft and pump shaft |
| | 423.7 | With specific motor details |
| | 423.8 | Having additional means to remove heat from pump or motor |
| | 423.9 | Having means to prevent debris from entering pump |
| | 423.15 | Having means to mount pump and motor in working position |
| | 423.11 | Having means to prevent fluid leaking between pump and motor |
| | 423.12 | Having bearing |
| | 423.14 | With specific housing details |
| | 424.1 | Supported for rotation on vertical axis |
| | 410.2 | Having piezoelectric driven blade |
| | 410.3 | Rotary expansible chamber pump |
| | 425 | SEPARATE MANUAL AND POWER DRIVEN PUMPING MEMBERS |
| | 426 | PLURAL PUMPS WITH INDIVIDUAL OR RELATIVE CONTROL |
| | 430 | INCLUDING MEANS TO (1) AGITATE PUMP FLUID, OR (2) PREVENT FOREIGN MATERIAL SETTLING FROM PUMP FLUID |
| | 432 | INCLUDING APPLICATION OF SEPARATE FLUID TO PUMP VALVE |
| | 434 | INCLUDING SEPARATE PORT ON NONCYCLIC VALVE FOR DRAINING PUMP PORTION |
| | 435 | INCLUDING SEPARATE PORT ON NONCYCLIC VALVE FOR VENTING OR FILLING PUMP PORTION |
| | 436 | TRANSVERSELY MOVABLE IMPELLING MEMBER (E.G., PADDLE) |
| | 437 | EXPANSIBLE CHAMBER TYPE |
| | 438 | Liquid coolant introduced into gas pump chamber or inlet |
| | 439 | Having additional chamber intake connection from nonpumping space |
| | 440 | Having separate noncyclic valve (e.g., bypass, etc.) |
| | 442 | Selectively usable plural inlet or outlet distributors for single chamber |
| | 443 | Pressure responsive distributor opened responsive to pumping member position |
| | 446 | Having means for holding pressure responsive distributor open |
| | 447 | Pressure responsive distributor continuously biased open |
| | 448 | Pump mounted in vertical tubular flow conduit removable as unit by driving rod manipulation |
| | 449 | Removable unit having piston normally fixed in conduit |
| | 450 | With latching or anchoring means released by rod movement |
| | 451 | Valve element mounted in fixed chamber wall removable with pumping member |
| | 454 | Including valve assembly, disassembly, or inspection facilitating means |
| | 455 | Having valve parts relatively moved for nonvalving function |
| | 456 | Relatively movable serial distributors |
| | 457 | Including distributor formed by moving cylinder or liner |
| | 458 | Plural pressure responsive distributors |
| | 460 | Moving cylinder |
| | 461 | Cylinder rotates or oscillates about longitudinal axis |
| | 462 | Unidirectionally rotating cylinder |
| | 464 | Cylinder oscillates about axis transverse to longitudinal axis |
| | 466 | Inlet or discharge controlled by cooperating port in reciprocating cylinder and fixed member |
| | 467 | Relatively movable cylinders |
| | 468 | Having integral pump piston or external pumping face |
| | 469 | Cylinder and piston reciprocate on common axis |
| | 470 | Biasing means effects induction stroke of abutment driven, vacuum producing pumping member |
| | 471 | Biasing means effects eduction stroke of abutment driven, pressure producing pumping member |
| | 472 | Bellows-type chamber |
| | 474 | Elongated flexible chamber wall progressively deformed |
| | 475 | Plural chambers |
| | 476 | Deformation by rolling or sliding engagement member |
| | 477.1 | Plural spaced engagement members or member portions |
| | 477.2 | Cassette |
| | 477.3 | Specific rollers or slides structure |
| | 477.4 |  Helical slide |
| | 477.5 | Roller axes or slide contact surfaces at significant angle with drive axis |
| | 477.7 | Biased rollers or slides |
| | 477.8 | Adjustable rollers or slides |
| | 477.6 | Positively driven rollers |
| | 477.9 | Specific backing member for flexible wall |
| | 477.12 | Specific flexible wall or interposed flexible member |
| | 477.13 | Flexible tube without backing member |
| | 477.14 | Endless chain or belt |
| | 478 | Inlet and discharge distributors at opposite ends of tubular flexible wall pumping chamber |
| | 479 | Distributor formed from integral portion of flexible wall pumping member |
| | 480 | Valve in collapsible wall pumping member |
| | 481 | Oscillating pumping member |
| | 485 | Delivery to different ports on successive strokes |
| | 486 | Plural pumping members in single pump chamber |
| | 489 | Control by withdrawal or tilting of pump piston relative to cylinder |
| | 490 | Pumping member position controlled port |
| | 491 | Common pumping member controls inlet or discharge for plural chambers |
| | 493 | Including plural controlled inlet or outlet flow paths |
| | 494 | Having means to selectively effect control at different positions of pumping member stroke |
| | 495 | Pumping member comprises valved piston |
| | 496 | Having serial control of inlet or discharge flow path |
| | 497 | Pumping member controlled end wall port |
| | 498 | Longitudinally spaced inlet and discharge sidewall ports |
| | 499 | Having means to effect control at different positions of pumping member stroke |
| | 500 | Control by movement of pumping member about axis |
| | 501 | Having coextensive distributor opposite pumping member end face |
| | 502 | Multiple cyclic outlet paths |
| | 503 | Multiple cyclic inlet paths |
| | 504 | Plural outlet paths to single discharge line acting under different conditions |
| | 505 | Electrically or magnetically actuated distributor |
| | 506 | Distributor movement adjustable |
| | 507 | Distributor moved by separate fluid responsive surface |
| | 509 | Distributor part forms traversed movable pump chamber wall portion |
| | 510 | Mechanically actuated distributor |
| | 511 | Piston carried distributor, one frictionally engages chamber wall, drive rod integral with other (e.g., piston driven by valve element through lost motion connection, etc.) |
| | 512 | Unitary distributor element controls inlet or discharge for plural chambers |
| | 513 | Conical engagement |
| | 514 | Distributor in piston |
| | 515 | Plural pumping chambers |
| | 518 | Common element forms inlet and discharge distributor |
| | 520 | Distributor abutted by or frictionally engaged with pumping member |
| | 521 | Plural pumping chambers |
| | 522 | Discharge conduit for first chamber communicates with nonpumping portion or second pumping member |
| | 523 | Including valved piston |
| | 524 | Unitary or interconnected elements form inlet or discharge distributors for plural chambers |
| | 525 | Common piston includes valves for plural axially aligned chambers |
| | 526 | Common inlet or discharge conduit mounted on piston |
| | 527 | Fluid conduit for one chamber extends through portion of another |
| | 528 | Fluid conduit for one chamber extends through portion of another |
| | 529 | Parallel laterally spaced relatively movable pistons |
| | 530 | Including nonvalved piston |
| | 531 | Unitary or interconnected elements form inlet or discharge distributors for plural chambers |
| | 533 | Common discharge conduit interposed between spaced parallel chambers |
| | 534 | Chambers formed at opposite ends of rectilinearly moving pumping member |
| | 538 | Inlet and discharge distributors at adjacent end of aligned chambers |
| | 539 | Parallel laterally spaced relatively movable pumping members |
| | 540 | Having pulsation dampening fluid receiving space |
| | 541 | Space formed on pumping member |
| | 542 | Inlet and discharge spaces |
| | 543 | Direct contact with confined compressible fluid |
| | 545 | Valved piston |
| | 546 | Piston contains inlet and outlet valves |
| | 547 | Fluid conduit fixed to piston |
| | 548 | Having rigidly attached imperforate wall member |
| | 549 | Having separate means biasing valve closed |
| | 550 | Flexible |
| | 551 | Hinged |
| | 552 | Reciprocating |
| | 555.1 | Fluid serially moved to opposite side of pumping member |
| | 557 | Pump chamber in constant communication with inlet or discharge conduit |
| | 558 | First distributor includes passage controlled by second distributor (i.e., inlet and outlet) |
| | 559 | Having pumping chamber pressure responsive distributor |
| | 560 | Single unitary element forms inlet and discharge distributor |
| | 561 | Pumping member position responsive stop for distributor |
| | 562 | Having means on pumping member for accommodating distributor portion |
| | 563 | Similar inlet and discharge distributors of different size or material |
| | 565 | Hinged inlet and discharge distributors in aligned conduits |
| | 566 | Nonmetallic inlet or discharge distributor |
| | 567 | Inlet and discharge distributors in coaxial ports |
| | 569 | Distributor positioned opposite pumping member end face |
| | 572 | MISCELLANEOUS |
| CROSS-REFERENCE ART COLLECTIONS | ||
| | 900 | SLURRY PUMPS (E.G., CONCRETE) |
| | 901 | CRYOGENIC PUMPS |
| | 902 | HERMETICALLY SEALED MOTOR PUMP UNIT |
| | 903 | TREADLE OPERATED |
| | 904 | WELL PUMP DRIVEN BY FLUID MOTOR MOUNTED ABOVE GROUND |
| FOREIGN ART COLLECTIONS | ||
| FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
| DIGESTS | ||
| | DIG1 | MATERIALS DIGEST |
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