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.


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363-131 121-55A 14-.5
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Class Number: 60
 Class Title: POWER PLANTS

Subclass  Subclass
Number    Title

  200.1   REACTION MOTOR (E.G., MOTIVE FLUID GENERATOR AND REACTION
           NOZZLE, ETC.)
  201     .Rotating or cyclic movement during axial thrust
  202     .Ion motor
  203.1   .Electric, nuclear, or radiated energy fluid heating means
  204     .Method of operation
  205     ..By chemical reaction
  206     ...Utilizing indirect heat exchange
  207     ...Utilizing plural reaction zones within a system
  208     ...Injecting air into the reaction zone
  209     ....Including using additive material
  210     .....Injected separately
  211     ...Injecting separate streams of fuel and oxidizer (e.g.,
              hypergole, etc.) into the reaction zone
  212     ....Using igniter aid
  213     .....Injected separately
  214     ....Oxidizer in the form of a mixture
  215     ....Fuel in the form of a mixture
  216     .....One component free metal
  217     ...Injecting mixture of fuel and oxidizer into the reaction
              zone
  218     ...Decomposing a compound in the reaction zone
  219     ...Using solid material in reaction zone
  220     ....Including injecting modifying fluid
  221     .Motive fluid principally liquid
  222     ..Plural discharge outlets
  223     .With destruction sensing and preventing means
  224     .Interrelated reaction motors
  225     ..Sequentially operated
  226.1   ..Air and diverse fluid discharge from separate discharge
             outlets (e.g., fan jet, etc.)
  226.2   ...Having thrust reverser
  226.3   ...Having means to effect a variable bypass ratio
  227     .Motive fluid principally steam
  228     .With thrust direction modifying means
  229     ..With plural selectively usable motive fluid ejecting means
  230     ..Jet stream deflecting means
  231     ...By secondary fluid injection
  232     ..Motive fluid outlet movable relative to motor part
  233     .Condition responsive thrust varying means
  234     ..Solid propellant depletion control
  235     ..Motive fluid outlet area and fuel flow control
  236     ...Plural spool motor-compressors
  237     ...Outlet area sensed to control fuel or oxidizer flow
  238     ...Motive fluid temperature sensed to control fuel flow or
              outlet area
  239     ...Compressor or turbine speed sensed to control fuel flow or
              outlet area
  240     ..Oxidizer and fuel flow control
  241     ..Plural burners in series
  242     ..Outlet area control
  243     ..Fuel flow controll
  244     .Motive fluid from diverse generators alternatively ejected
            through outlet
  245     ..Propellant supply used in one operation reduced before
             starting another
  246     .Turborocket
  247     .Intermittent combustion
  248     ..Air bypass passage
  249     ..Aerodynamic valve
  250     .Plural propellants to burn sequentially
  251     .Solid and fluid propellant
  252     .Gel propellant
  253     .Solid propellant
  254     ..Including means to terminate or regulate motive fluid
             production
  255     ..Including propellant support means
  256     ..Including ignition means
  257     .Liquid oxidizer
  258     ..Including injector means
  259     ..Including pressurizing means
  260     ..Including heating means
  261     .Including afterburner
  262     .Air passage bypasses combustion chamber
  263     .Plural motive fluid generating means or plural outlets
  264     .Including motive fluid treating means
  265     .Means to flow film on surface
  266     .Including heat exchange means
  267     ..For a liquid
  268     .Including counter rotating rotors
  269     .Including mechanical air compressor or air flow inducing means
  270.1   .Air supplied by ram effect
  271     .Motive fluid outlet means
  595     INTERNAL COMBUSTION TYPE FREE PISTON DEVICE SUPPLIES MOTIVE
           FLUID TO MOTOR
  596     INTERNAL COMBUSTION TYPE FREE PISTON DEVICE WITH PRESSURE FLUID
           STARTING MEANS
  597     FLUID MOTOR MEANS DRIVEN BY WASTE HEAT OR BY EXHAUST ENERGY FROM
           INTERNAL COMBUSTION ENGINE
  598     .With supercharging means for engine
  599     ..With means to change temperature of supercharged flow
  600     ..With condition responsive valve means to control supercharged
             flow and exhaust products
  601     ...With coordinated engine fuel control
  602     ..Having condition responsive valve controlling engine exhaust
             flow
  603     ...With coordinated fuel control means for engine
  604     ..With heat exchanger to transfer energy from engine exhaust to
             motive fluid for motor
  605.1   ..Supercharging means driven by engine exhaust actuated
             motor
  605.2   ...With exhaust gas recirculation
  605.3   ...With motor bearing lubrication or cooling
  606     ...With means to provide additional motive fluid for motor
  607     ...With additional drive means for supercharging means
  608     ....With condition responsive drive means control
  609     ...Fluid motor and engine each drive at least one means to
              supercharge the engine
  610     ....Supercharging means convertible from series to parallel
  611     ...Having condition responsive means to control superchargedd
              flow to engine
  612     ...Plural superchargers
  613     .With means to store combustion products prior to entry into
            fluid motor means
  614     .Having fluid motor motive fluid treating, controlling or
            conditioning means
  615     ..Having condition responsive control of motive fluid
  616     ..Having means to transfer heat energy between engine exhaust
             and motive fluid for fluid motor
  617     ...And having means to add fluid to motive fluid
  618     ...Motive fluid is vaporized liquid
  619     ..Having means to add a diverse fluid to combustion products
  620     .Fluid motor means is expansible chamber type with movable parts
            of motor and engine being interconnected
  621     ..Movable wall portions are rigidly interconnected
  622     ..Expansible chamber of fluid motor means receives exhaust
             alternately from two or more expansible chambers of engine
             means
  623     ..Fluid motor is rotary type
  624     .Fluid motor means is a turbine with output means mechanically
            interconnected with internal combustion engine output
  272     INTERNAL COMBUSTION ENGINE WITH TREATMENT OR HANDLING OF EXHAUST
           GAS
  273     .Methods
  274     ..Anti-pollution
  275     .By electrolysis, electrical discharge, electrical field, or
            vibration generator
  276     .Having means analyzing composition of exhaust gas
  277     .Having sensor or indicator of malfunction, unsafeness, or
            disarray of treater (e.g., fusible link, etc.)
  278     .Material from exhaust structure fed to engine intake
  279     ..Separated reactive constituent of exhaust fed to engine
  280     .Having auxiliary device mechanically driven by exhaust gas
  281     .Having exhaust gas collection and storage, or use as a pressure
            fluid source
  282     .By means producing a chemical reaction of a component of the
            exhaust gas
  283     ..With means handling crankcase, carburetor, or gas tank vapor
  284     ..Automatic or timed reactor purge or heat-up in engine starting
             operation
  285     ..Engine fuel, air, or ignition controlled by sensor of reactor
             condition
  286     ..Condition responsive control of heater, cooler, igniter, or
             fuel supply of reactor
  287     ..Condition responsive control of reactor feed, pressure, or
             by-pass
  288     ...Exhaust gas diverted from reactor or treating agent mixer
  289     ...Air feed to reactor modulated or diverted by control
  290     ....Responsive to engine speed or intake manifold pressure
  291     ...Of or by pressure in reactor or of engine exhaust
  292     ....Valve at reactor outlet controlled
  293     ....Check valve feeds air to exhaust system
  294     ..Reactor control correlated with cyclic or external engine
             control
  295     ..Having means for regenerating, replacing, or feeding liquid or
             solid reagent or catalyst
  296     ...Flow reversing structure
  297     ..Reactor plus a washer, sorber or mechanical separatorr
  298     ..With means cooling reactor or reactor feed
  299     ..Using a catalyst
  300     ...Having a means for heating the catalyst
  301     ...Reducing type catalyst
  302     ...Catalyst in engine manifold or at exhaust port
  303     ..Having heater, igniter, or fuel supply for reactor
  304     ..Oxidizer feed passage at engine exhaust valve, manifold or
             port
  305     ...Distributed to plural individual ports or valves
  306     ...To port zone and downstream of port
  307     ..Pressurizing means feeds reactive air to reactor
  308     ...Exhaust actuated air aspirator
  309     .Having retainer or flow director for exhaust gas condensate
  310     .Treated by washing, or having liquid contact structure
  311     .By sorber or mechanical separator
  312     .Pulsed, timed, tuned or resonating exhaust
  313     ..Correlated exhausts from plural cylinders
  314     ..Two-cycle engine
  315     .Pump draws exhaust gas from engine
  316     ..Fluid jet or stream aspirates exhaust gas
  317     .Exhaust and external fluid mingling structure
  318     ..External fluid is steam
  319     ..Exhaust aspirates external fluid
  320     .Exhaust gas or exhaust system element heated, cooled, or used
            as a heat source
  321     ..Cooled manifold
  322     .Having vibration attenuating, or expansion and contraction
            relieving structure
  323     .Common receiver having inlets from plural cylinder (i.e.,
            exhaust manifold)
  324     .Divider, collector, valve means, or boundary layer device
            controlling exhaust gas flow
  625     INTERNAL COMBUSTION ENGINE WITH STRUCTURE ROTATING OR STARTING
           IT BY PRESSURE FLUID
  626     .Having means for compressing, generating or storing pressure
            fluid
  627     ..Having condition responsive control of means
  628     ..Storage vessel charged by internal combustion engine acting as
             a pump
  629     ..Pressure fluid motor convertible to pressure fluid pump
  630     .Having manual selector of engine valve settings or of fluid
            flow branches
  631     ..Including means selecting direction of engine rotation
  632     ONE SHOT EXPLOSION ACTUATED EXPANSIBLE CHAMBER TYPE MOTOR
  633     .Having means for feeding fluid fuel
  634     .Having plural charge holding means
  635     .Having mechanical means securing working member in fired
            position
  636     .Having latch, rupture or safety means resisting movement of
            working member or firing means from unfired position
  637     .Having orifice or conduit restricting flow of combustion
            products from combustion zone to motor chamber
  638     .Having shock absorbing, damping or slow down means for working
            member
  39.01   COMBUSTION PRODUCTS USED AS MOTIVE FLUID
  39.02   .Processes
  39.03   ..Regulation of power output
  39.04   ..Multiple expansionn
  39.05   ..Addition of steam and/or water
  39.06   ..Ignition and/or fuel injection
  39.07   .With nonmotor output
  39.08   .With lubricators
  39.091  .With safety device
  39.092  ..Debris anti-ingestion preventer
  39.093  ..Ice preventer or de-icer
  39.094  ..Fuel flusher or drainer
  39.1    ..Excess pressure relief
  39.11   ..Flame screen
  39.12   .With combustible gas generator
  39.13   .Automatic starting and stopping of combustion products
            generator
  39.141  .With starting device
  39.142  ..Separate starting device or motive fluid source
  39.15   .Multiple fluid-operated motors
  39.161  ..Re - expansion
  39.162  ...Counter - rotatable
  39.163  ...Selectively connectable
  39.17   ...With treatment between stages
  39.181  ..Different fluids
  39.182  ...Steam and combustion products
  39.183  ...Air and combustion products
  39.19   .Different fluids
  39.23   .With variable oxidizer control
  39.2    .With regulation of power output
  39.21   ..Plural generators, selectively operable
  39.22   ..Varying cycle frequency relative to prime mover speed
  39.24   ..Automatic
  39.25   ...Motive fluid to prime mover
  39.26   ...Oxidizer, fuel and water or steam
  39.27   ...Oxidizer and fuel
  39.281  ...Fuel
  39.282  ....Torque sensor
  39.29   ...Oxidizer
  39.3    ...Water or steam
  39.31   .With mounting or supporting structure
  39.32   .With expansible connections
  39.33   .Convertible and combined
  39.34   .Rotating combustion products generator and turbine
  39.35   ..Continuous combustion type
  39.36   .Coaxial combustion products generator and turbine
  39.37   .Plural combustion products generators in ring coaxial with
            turbine
  39.38   ..Intermittent combustion type
  39.39   ...Common rotary distributing valve
  39.4    ...Common cam member
  39.41   .With exhaust pump for combustion products generator
  39.42   .With reversible turbine
  39.43   .With dual function turbine
  39.44   .With closed pocket turbine
  39.45   .With gear, pressure exchanger, or screw-type compressor
  39.461  .Using special fuel or oxidizer
  39.462  ..Monofuel type
  39.463  ..Plural distinct fuels
  39.464  ..Solid, slurry, emulsive, or suspensive type fuel
  39.465  ..Gaseous fuel at standard temperature and pressure
  39.47   ..Solid fuel containing oxidizerr
  39.48   .With fluid pressure feeding of oxidizer, fuel or water
  39.49   .With air injection by fuel or steam jet
  39.5    .With exhaust treatment
  39.511  ..Regenerator
  39.512  ...Rotary heat exchanger
  39.52   ..Exhaust gas recycling
  39.53   .With addition of steam and/or water
  39.54   ..Added in prime mover
  39.55   ..Added in combustion products generator
  39.56   ..Mixed in space above water
  39.57   ...Combustion products pass through water
  39.58   ..Added in mixing nozzle or in turbine nozzle
  39.59   ..Added in separate mixing chamber
  39.6    .External-combustion engine type
  39.62   ..With plurality of combustion products generator per
             cylinder
  39.63   ..Continuous combustion
  39.64   .Alternate cycle
  722     .Combustion products generator
  723     ..Having catalyst in combustion zone
  724     ..Plural with intercycling by pressure fluctuations
  725     ..Having noise reduction means
  726     ..With means to pressurize oxidizer for combustion or other
             purposes
  727     ...With oxidizer accumulator
  728     ...Having oxidizer cooling means
  729     ...Reciprocating positive displacement type
  730     ..With liquid heat exchanger
  731     ..With combuston products accumulator
  732     ..Having initial fuel-rich combustion zone
  733     ...Separate fuel injectors for plural zones
  734     ..Having fuel supply system
  735     ...Fuel injected into turbine
  736     ...Fuel preheated upstream of injector
  737     ...Fuel and air premixed prior to combustion
  738     ....Premix tube within combustion zone
  739     ...With fuel supply manifold for separate injectors
  740     ...With fuel injector
  741     ....Fuel control valve integral with injector
  742     ....Unitary injector having plural fuel flow paths
  743     ....Surface film injector
  744     ....Rotary fuel injector
  745     .....Slinger type
  746     ....Plural distinct injectors
  747     .....Injectors in distinct radially spaced parallel flow
                combustion products generators arranged to combine
                discharges
  748     ....With attendant coaxial air swirler
  749     ...Having bluff flame stabilization means
  750     ..Having means to recycle combustion products internally of
             combustion zone
  751     ..Having diffuser for air inlet
  752     ..Combustor liner
  753     ...Ceramic
  754     ...Porous
  755     ...Having means to direct flow along inner surface of liner
  756     ....Air directed to flow along inner surface of liner dome
  757     ....In an axial directionn
  758     ...Air introduced within liner counter to flow of combustion
              products
  759     ...Air scoop extends into air flowing outside liner
  760     ...Air outside liner flows counter to combustion products flow
              within liner
  39.75   ..With turbine
  39.76   ..Intermittent combustion type
  39.77   ...Resonating
  39.78   ...Rotating, oscillating, or reciprocating
  39.79   ...With fluid actuated valve
  39.8    ...With pressure actuated valve
  39.81   ...With fuel metering valve
  39.821  ..With ignition device
  39.822  ...Catalytic type
  39.823  ...Pyrotechnic squib or charge type
  39.824  ...Hypergolic type
  39.825  ...Single shot liquid type
  39.826  ...Pilot or torch type
  39.827  ...Spark type
  39.828  ...Incandescent type
  39.83   .Cooling of auxiliary components
  639     MOTOR ACTUATED BY ACCUMULATING AND DUMPING LIQUID OR FLUENT
           MATERIAL
  640     .Rocking member having opposite accumulating means
  641.1   UTILIZING NATURAL HEAT
  641.2   .Geothermal
  641.3   ..With direct fluid contact
  641.4   ..With deep well turbopump
  641.5   ..With fluid flashing
  641.6   .With natural temperature differential
  641.7   ..Ocean thermal energy conversion (OTEC)
  641.8   .Solar
  641.9   ..With distillation
  641.11  ..With elevated structure
  641.12  ...Air is working fluid
  641.13  ..With single state working substance
  641.14  ...Gaseous
  641.15  ..With solar concentration
  516     MOTOR OPERATED BY EXPANSION AND/OR CONTRACTION OF A UNIT OF MASS
           OF MOTIVATING MEDIUM
  517     .Unit of mass is a gas which is heated or cooled in one of a
            plurality of constantly communicating expansible chambers and
            freely transferable therebetween
  518     ..Having means to change operational phase relationship of
             working member and displacer
  519     ..Expansible chamber having rotatable or oscillatory displacer
  520     ..Having free floating displacer or transfer piston
  521     ..Having means to increase or diminish quantity of motivating
             mass
  522     ..Having means to control rate of flow of mass between chambers
  523     ..Having electrical heating means for mass
  524     ..Having means to control temperature of heating or cooling
             chamber
  525     ..Motor having plural working members
  526     ..Motor having regenerator for mass
  527     .Mass is a solid
  528     ..Mass heated because of resistance to flow of electric current
  529     ..Mass is bimetallicc
  530     .Mass is a liquid
  531     ..Liquid is vaporized
  508     FLUID WITHIN EXPANSIBLE CHAMBER HEATED OR COOLED
  509     .Special motive fluid
  510     .Air rarefied by combustion
  511     .Fluid mingling (e.g., condensation)
  512     .Having means within the working chamber to effect the pressure
            of fluid therein
  513     ..Electric heating means
  514     .Concurrent fluid supply and vaporization
  515     .Having control means for heating or cooling means
  642     MOTIVE STEAM GENERATED FROM HOT WATER CHARGE BY REDUCING
           PRESSURE ABOVE CHARGE
  643     MOTIVE FLUID ENERGIZED BY EXTERNALLY APPLIED HEAT
  644.1   .Heating motive fluid by nuclear energy
  645     .Process of power production or system operation
  646     ..Including start up, shut down, cleaning, protective or
             maintenance procedure
  647     ..Including operating at or above critical pressure
  648     ..Including production of withdrawable product or steam for
             external use
  649     ..Including mixing or separating materials of different chemical
             compositions in a motive fluid flow path
  650     ..Producing power by heating and cooling a single phase fluid
  651     ..Including vaporizing a motive fluid other than water
  652     ..Of accommodating, fluctuating or peak loads
  653     ..Including superheating, desuperheating, or reheating
  654     ..Including mingling motor exhaust steam with boiler feed water
  655     .Noncommunicating heat transferring motive fluid system (e.g.,
            cascade, etc.)
  656     .Having ancillary structure for starting
  657     .Having apparatus cleaning, sealing, lubricating, purging,
            standby, or protecting feature
  658     ..Damage to heat receiving element prevented by automatic means
             maintaining minimum flow
  659     .Including heat, steam, or compressed gas storage means
  660     .Having condition responsive control
  661     ..Of or by heat rejecting means or its bypass
  662     ..Involving feed from source means to separate motor stages or
             utilizing means
  663     ..Of branched feed to, condition of, or heating means for motive
             fluid between motor stages
  664     ..Of or by heat source material or element
  665     ...And of or by boiler liquid level or feed
  666     ..Of bypass of superheater or desuperheater
  667     ..Of means controlling boiler or its feed
  668     .Power system physically related to vehicle structure
  669     .Motor mounted in or on boiler
  670     .Power system involving change of state
  671     ..Motive fluid comprises a material other than steam or water
  672     ...Motor exhaust used in combustion zone
  673     ...One fluid absorbs or reacts with another
  674     ...Air and steam supplied to motor
  675     ..Gravity motor actuated by weight of condensed vapor
  676     ..Including plural distinct boilers, heat supplies or external
             sources of vapor
  677     ..Serially connected motor with intermotor supply or withdrawal
             of motive fluidd
  678     ...Withdrawn fluid heats boiler feed indirectly
  679     ..Having motive fluid reheater between serially connected
             motors
  680     ...Motive fluid bypassing upstream motor heats reheater
  681     ..Motor exhaust mixes with combustion products of boiler heater
  682     .Single state motive fluid energized by indirect heat transfer
  683     ..Motor exhaust fed into combustion device
  684     ..Including interstage reheat means
  325     PRESSURE FLUID SOURCE AND MOTOR
  532     .Shock or resonant wave type of energy transmission
  533     .Pulsator
  534     ..Having signal, indicator or recorder of apparatus condition
  535     ...Responsive to leakage of pulse fluid
  536     ..Plural correlated pulsators transmitting unlimited rotary
             input to unlimited rotary output
  537     ..Programmed, self-cycled or self-pulsed
  538     ...Including electrical control or actuation
  539     ...Cam drive of plural masters
  540     ...Including timer or time delay means the cycle
  541     ...Having means terminating cycle at parking or holding
              position
  542     ...Pneumatic device having pulse air bleed or supply means
  543     ...Self-operated pulse fluid purge or quantity adjustment
              structure
  544     ...Continuously acting self-pulsing master with manually
              settable slave release or output control valve
  545     ..Having electricity or magnetically operated structure
  546     ..Pulsator synchronizes movement of plural outputs
  547.1   ..With control of or by a separate power fluid, etc.
  547.2   ...By pressure responsive valve dividing flow between motor
              and an auxiliary load
  547.3   ...By manually operated valve dividing flow between motor
              and an auxiliary load
  548     ...Flow in recirculating circuit controlled
  549     ...Master structure provides non-overlapping periods of
              pressurization of diverse pressure ranges in distinct
              pulsator circuits
  550     ...Master driven by manual power control lever on power failure
              and having means adjusting lever throw or master resistance
              responsive to failure of power fluid supply
  551     ...Manual master and controller of motor driven master actuated
              by separate linkages to a common operating lever
  552     ...Mechanical feedback to manual control controls power fluid to
              establish position of working member of master
  553     ....With distinct piston or diaphragm exposed to pulsator
               pressure imparting feel to manual control
  554     ....Having load deformable means between master working member
               and motor thrust means adjusting bias of manual control
  555     ...Master movement of master produces a pressure that controls
              the power fluid
  556     ....Power fluid input controller operated by piston or diaphragm
               acted on one side by pressure of a manual master and on the
               other by pressure of a power driven master
  557     ....Pressurized fluid from manual master charges slave and
               controls power fluid to separate master
  558     .....Fluid from the manual master fed to slave through a passage
                in the working member of the power master
  559     ......Passage extends across the expansible chamber of the motorr
                 of the power master
  560     ...Power fluid also fed into a separate expansible chamber
              directly driving output means
  561     ..Pressure balancing free piston or diaphragm between parallel
             pulsators
  562     ..Master piston of one pulsator circuit drives master piston of
             a parallel circuit through a resilient, fluid or lost motion
             connection
  563     ..Expansible chamber of output pressurized directly by motive
             fluid and indirectly by a master driven by the motive fluid
  564     ...Delivery pressure of master lower than pressure driving
              master
  565     ..Master and diverse non-pulsator drive of output member or
             members
  566     ...Manual master and alternate nonmanual pressure fluid source
              feed output motor
  567     ..Including plural separately operable master actuators or
             master units driving a common slave
  568     ..Having distinct means for holding a pulsator element in set
             position
  569     ...Distinct externally operable valve sealing pulse fluid in
              slave
  570     ...Mechanical latch, brake or detent
  571     ..Double-acting slave unit or opposed slaves having a single
             output
  572     ...Having pulse fluid pressure or quantity compensating or
              adjusting means
  573     ....Self-acting phase balancing means acting at midpoint or end
               of stroke
  574     ..Automatic control of plural stage pressure generation or
             utilization
  575     ...Automatic trapping of fluid back of delivery piston forms
              temporary pulsator driving piston during one stage
  576     ...Of separate movement of plural delivery pistons
  577     ....Central externally driven piston drives surrounding piston
               means through a load responsive connector
  578     ...Unitarily movable displacer delivers fluid from two delivery
              chambers, one chamber being ineffective under high pressure
              delivery
  579     ..Slave of first master drives master of another slave
  580     ...Parallel masters driven by first pulsator
  581     ..Plural structurally related master pistons, cylinders or
             pulsator circuits
  582     ..Having safety standby structure becoming operative upon
             apparatus malfunction
  583     ..Pulse fluid vessel embracing output piston and fluid
             displacing element
  584     ..Having separately and manually operated structure for
             charging, discharging bleeding, or adjusting pulsator volume
  585     ..Holder for reserve liquid feeds master
  586     ...Having means to establish holding pressure in pulse liquid
  587     ....Pressure maintained through inlet or piston cylinder of
               master
  588     ...Master piston traps liquid on advance across a feed port in
              cylinder wall
  589     ...Master piston or its actuator mechanically operates valve
              between holder and master cylinder
  590     ..Condition responsive device limits return flow from biasedd
             slave
  591     ..Having valve, director, or restrictor in pulse fluid flow
             path
  592     ..Having, surge chamber, fluid supply means, or means
             compensating for fluid expansion, contraction or leakage
  593     ..Having fluid motor driving piston of master unit
  594     ..Having cam, or lever system driving master
  326     .Utilizing a mixture, suspension, semisolid or
            electro-conductive liquid as motive fluid
  327     .Methods of operation
  328     .Having a signal, indicator or inspection means
  329     .Condition responsive control means responsive to, or
            compensating for, motive fluid compressibility, temperature
            variation or viscosity variation driven master
  330     .Coaxial impeller and turbine unit
  331     ..Reversible turbine or turbine system
  332     ...Having pitch control or motive fluid flow guide or reaction
              blade means
  333     ...Having means to brake or free flow guide means
  334     ...Having means to remove or insert flow guide means from or
              into motive fluid flow path
  335     ...Having plural individually actuatable units
  336     ..Having filtering, de-aerating, cleaning or bleeding structure
  337     ..Having heating or cooling means
  338     ..Having shock, vibration or surge control structure
  339     ..Having lubricating means
  340     ..Plural turbines drive relatively movable output members
  341     ..Having brake or clutch controlling movement of a flow guide
             located in the impeller-turbine flow path
  342     ...With means adjusting blade orientation or blade exposure in
              flow path
  343     ...Speed or fluid condition responsive brake or manually
              adjustable brake
  344     ....Braked casing
  345     ...One-way clutch between the movable guide, an impeller,
              turbine or a second movable guide
  346     ...Plural movable guides, one having a one-way clutch to frame
  347     ..Having condition responsive or manually settable control means
             to regulate unit output
  348     ...Distributes motive fluid between plural units, stages or
              guides
  349     ...Adjusts impeller or turbine axially
  350     ....Variable face clearance
  351     ...Controls scoop operation for removing liquid from rotating
              casing
  352     ...Of means within an impulse, reaction or energy transfer flow
              path being adjustable to modify flow of motive fluid
  353     ....Motive fluid guide vane transferable axially into or out of
               motive fluid flow path
  354     ....Pitch or orientation of flow directing guide or blade
               controlled
  355     .....Speed responsive
  356     .....Motive fluid pressure responsive
  357     ...Of means adjusting the mass of level of motive fluid at the
              impeller energy transfer zone
  358     ....Including continuously driven auxiliary pump
  359     ....Exhaust valve
  360     .....Motive fluid pressure responsivee
  361     ..Having separate guide or reaction means in circuit including
             impeller and turbine
  362     ...Rotatable guide or reaction means coaxial with the impeller
  363     ..Plural impeller-turbine units
  364     ..Impeller or turbine integral with unit housing
  365     ...Fluid deflecting means
  366     ...Toroidal impeller and turbine
  367     ....Having core or ring member at interface
  368     .Control by independently operated punch card, tape, digital
            computer, counter, template, or programmer cyclic control
  369     .Cyclically operable reciprocating or oscillating motor or
            output stroke device
  370     ..Pneumatic motor
  371     ..Having means to store and release energy usable to energize
             motor work output means
  372     ...Pneumatic counter-balance of gravity load on motor (e.g.,
              deep well pump rod, etc.)
  373     ..Progressive change of stroke length in successive strokes
  374     ..Correlated independently movable output members
  375     ..Correlated power input pumps and/or pressurized fluid sources
  376     ..Motor control means having timer or time delay means
  377     ...Provides dwell or press period at end of stroke
  378     ..Having purging, surge accommodating, or leaking handling or
             replenishing structure
  379     ..Having condition responsive cycle abort means or means for
             manual control of motor output
  380     ..With means to shut down system after a complete to and fro
             cycle of the motor means
  381     ..Having condition responsive control of variable displacement
             pump
  382     ...Cam or gear carried by stroke device varies displacement
              pump
  383     ..Automatic or cyclic means provided plural distinct motor
             speeds in cycle
  384     .Expansible chamber type volumetric responsive measuring device
            in series with or driven by output motor operates the motor
            controller
  385     .Manual pump pressurizes fluid to position output motor motive
            fluid control valve
  386     ..Manual pump supplies motive fluid to output motor when power
             motive fluid pump is inactive
  387     .Distinct structure metering and dispensing a stroke length
            determining volume of motive fluid to the motor
  388     .Full range correspondence of position of external manipulator
            and motor positioned member effected by feedback linkage
  389     ..Positioned member is displacement controller of second motor
             pump
  390     ..Electrical feedback means
  391     ..Feedback linkage controls variable displacement pump
  392     ..Feedback includes plural movable valve parts
  393     .Manipulator for motive fluid control valve having load feel or
            motor pressure feedback
  394     .Having apparatus control by timer or delay means
  395     .Control relative to independently driven oscillator, speed
            standard or pacer device
  396     .Utilizing lubricant, starter motor, cooling fluid, or fluid
            used for combustion in an internal combustion engine
  397     ..Vacuum generated by internal combustion engine intake manifoldd
             powers motor
  398     .Utilizing natural energy or having a geographic feature
  399     .Unsafeness, unreadiness or disarray prevent manual change or
            operative state
  400     .Selective or simultaneous power and manual energy inputs
  401     ..Fluid motor and directs manual drive of output device
  402     ..Separate manual and motor driven pumps supply motive fluid to
             output motor
  403     .Apparatus having means responsive to or ameliorating the
            effects of breakage, plugging, mechanical failure or power
            failure
  404     ..Stand-by stored energy means activated responsive to
             malfunction or power failure
  405     ..Second motive fluid supply means takes load responsive to
             failure of first
  406     ..Output means locked, positioned or released on failure of
             motive fluid supply means
  407     .Pneumatic motor with gas supply or removal device
  408     ..Convertible motor-pump device selectively charges and is
             driven by gas from storage vessel
  409     ..Having automatic control
  410     ...Responsive to condition in gas storage vessel
  411     ...Suction pressure on motor regulated
  412     ..Having pump device
  413     .With control means for structure storing work driving energy
            (e.g., accumulator, etc.)
  414     ..Energy of braking or of reversed load on motor stored
  415     ..Accumulator pressurized by gas pump or external gas supply
  416     ..Plural accumulators
  417     ..Stroke device driven by successively operated energy input
             structure and stored energy structure
  418     ..Control by sensor of accumulator condition
  419     .Motor driven by motive fluid of system drives pump pressurizing
            motive fluid of system
  420     .Having condition responsive control in a system of distinct or
            separately operable outputs or output drive units
  421     ..With plural pump or motive fluid source relationships selected
             by multiway valve
  422     ..Independently actuatable outputs with condition responsive
             means insuring sufficiency of feed of motive fluid
  423     ..Including means for controlling or for reversing input pump
             drive
  424     ..Serially connected motors controlled to establish parallel
             operation or to by-pass a motor means of the series
  425     ..Condition responsive means establishes number of motor
             sections driving a common output
  426     ..Speed of, pressure in, or position of one output motor or
             motor section controls another
  427     ..With manual control or selection of motor, motor speed or
             motor load
  428     .Having condition responsive control in a system of separately
            operable power input pumps, pump motors, pump cylinders or
            pressure fluid sources
  429     ..With externally operated multiway valve changing the
             relationships of the motive fluid pressurizing or supplying
             means
  430     ..Pressure or volume responsive means shifts the relationship
  431     .Condition responsive control of or by input to input pump drivee
            means
  432     ..Pump drive means deactivated responsive to position of output
             stroke device
  433     .Having correlated or joint actuation of controller of input to
            motive fluid pressurizer and of controller of motive fluid
            floow
  434     ..Interlinked pump drive controller and manipulator of stroke
             device
  435     .Having a mechanical clutch or brake device in the power train
  436     ..Correlated control of device and motive fluid flow controller
  437     ..Selective fluid and mechanical drive of output from input
  438     ...Condition responsive selection
  439     ..Device acts on intermediate reactive rotor to modify speed
             ratio or direction
  440     ...Condition or direction responsive device
  441     ..Condition or direction responsive device
  442     ..Device holds output in adjusted position
  443     .Servo-motor having externally operated control valve sets motor
            or pump displacement
  444     ..Having auxiliary pump or external source of motive fluid
             supplying servo motor
  445     .Condition responsive control of pump or motor displacement
  446     ..Pump displacement varied responsive to position of motor or
             output device
  447     ..Control actuated by a servo-motor fed by a speed indicating
             auxiliary pump
  448     ..By means sensing rotational speed of output motor
  449     ..By means sensing rotational speed of prime mover or pump
  450     ..Choke in motor feed or discharge line establishes displacement
             control pressure (e.g., rate of flow responsive, etc.)
  451     ..Controlled by torque of motor or motor discharge pressure
  452     ..Pump displacement controlled by pump discharge or motor feed
             pressure
  453     .With means purging, cleaning or separating undesirables from
            motive fluid
  454     ..Solids from liquid separator
  455     .Having leakage collecting structure
  456     .Having distinct cooling or lubricating structure
  457     .Collapsible joined device having fluid trapping valve in joint
  458     .Having assembly or repair structure
  459     .Condition responsive control of motive fluid flow
  460     ..Holding or braking valve in motor exhaust line controlled by
             pressure in motorfeed line
  461     ..Discharge from contracting cylinder of double-acting motor
             controlled
  462     ..With externally operable multiwasy valve means directing flow
             to a stroke device
  463     ...Sensor of external condition controls valve
  464     ..Of motive fluid transfer between a reservoir and a
             recirculating path of a pump motor loop
  465     ..Having externally operable means for setting motor or pump
             displacement or direction of rotation
  466     ..Of braking or holding valve in motor discharge line
  467     ..Stroke cylinder open to exhaust responsive to position of
             output member
  468     ..Of by-pass of motor, pump or flow control element
  469     .Having means controlling or attenuating shock vibration,
            sticking or chatteringg
  470     .Externally operated multiway valve or interconnected control
            elements control motive fluid for a limited stroke to-and-fro
            device
  471     ..Having plural distinct or separately operable output means
  472     ..Flow to opposed expansible chambers having a common output
             reversed
  473     .Pump means moves motive fluid from one chamber to an opposite
            chamber of opposed expansible chambers having a common output
  474     ..Valve or restriction controls gravity or spring return of
             output
  475     ..With means compensating for charge leakage or volume
             difference between discharging and receiving chambers
  476     ..Reversible delivery from pump means
  477     .Ram driven by fluid pumped from reservoir
  478     ..Having means pressurizing, vacuumizing or venting reservoir
  479     ..Having selective or variable pump displacement or pump drive
             leverage
  480     ..Telescopic ram
  481     ..Having fluid trapping means with a manual release or by-pass
             holding ram
  482     ...Release valve and pump actuated by a common handle
  483     .Having selecting means distributing motive fluid between plural
            motors or cylinders rotatating a common output shaft
  484     .Having plural energy outputs (e.g., plural motors, etc.)
  485     ..Unit having coaxial rotary output shafts and pump means in a
             common housing (e.g., automobile differential, etc.)
  486     .Having plural energy input means, pumps or diverse pump
            outlets
  487     .Input pump and rotary output motor system having displacement
            varying type of direction or speed selector
  488     ..Including auxiliary system feed pump
  489     ..Having valve means controlling flow between pump and motor
  490     ..Both motor and pump have displacement adjustment means
  491     ...Having common or intercontrolled adjuster actuating means
  492     ....Motor swash plate and pump swash plate intercontrolled
  493     .Valve means reverses flow from pump to reversible rotary motor
  494     .Including by-pass or restrictor controlling flow circuit
  495     MOTOR HAVING A BUOYANT WORKING MEMBER
  496     .With means to vary buoyancy of working member
  497     .Working member actuated by the rise and fall of a surface of a
            body of fluid
  498     ..Having tide responsive working member positioning means
  499     ..Having means responsive to lateral impulse of fluid
  500     ..Having articulated buoyant members
  501     ..Motor is free floating unit
  502     ..Having fluid flow or wave controlling, confining or directing
             means
  503     ...In which the control means is variable
  504     ..Having flexible strand working member motion transmitting
             means
  505     ..Having relatively movable working members
  506     ..Working member pivotally supported
  507     ..Having one-way clutch power transmission means, e.g., ratchet,
             etc.
  685     MOTOR HAVING EXHAUST FLUID TREATING OR HANDLING MEANS
  686     .Having condition responsive control of exhaust structure or by
            exhaust condition
  687     .Motor-exhaust assembly with stress relieving or absorbingg
            structure
  688     .Water mingled with exhaust steam
  689     .Exhaust fluid mingled with non-exhaust fluid
  690     .Motor and indirect heat exchanger
  691     ..Boiler feed water heated by exhaust
  692     ..Having condensate pump
  693     ..Plural heat exchangers
  694     .Including exhaust flow directing or dividing device
  695     ..Device directs exhaust of air motor into atmosphere
  696     ..Device is draft structure of hydraulic motor
  697     ..Turbine discharge directed to flow line
  698     SYSTEM HAVING PLURAL MOTORS OR HAVING DIVERSE TYPES OF ENERGY
           INPUT
  699     .Spring type motor and internal combustion engine motor
  700     .Motors intercontrolled responsive to angular speed differential
            of rotatable output shafts
  701     ..Hydraulic or pneumatic intercontrol system
  702     ..Electrical intercontrol system
  703     .Control including pacer, oscillator, punch card, template or
            tape
  704     .Control including clock, retarder or programmer
  705     .Signal, indicator or inspection means
  706     .Having condition responsive control
  707     ..Of branched flow of motive fluid through serially connected
             motors
  708     ..Of or by motor cooling, ventilation, or brake system
  709     ..Of or by disconnect or load release means to output means or
             between motors
  710     ..Intercontrol of internal combustion engines responsive to
             relative fuel or manifold conditions
  711     ..First motor load share adjusted relative to the load share of
             a second motor driving a common load, responsive to a
             condition of the second motor or of the load
  712     .Engine apparatus or system actuatable selectively or
            simultaneously by internal combustion of fuel and by expansion
            of motive fluid
  713     .Plural motors having brake means for motor or output means
  714     .Plural motors having supply or control of cooling, lubricating,
            or scavenging fluid
  715     .Plural motors, connected for serial flow of motive fluid
  716     .System of plural motors having a common output structure
  717     ..And another output
  718     ..Having disconnect means between a motor and the output
  719     .Interrelated or group control operating means for plural motors
            or outputs
  720     .Unitary support for plural motors
  721     MISCELLANEOUS
  *       ******************************
  *       CROSS-REFERENCE ART COLLECTIONS
  *       ******************************
  900     EXCESS AIR TO INTERNAL COMBUSTION ENGINE TO ASSIST EXHAUST
           TREATMENT
  901     EXHAUST TREATMENT SPECIAL TO ROTARY INTERNAL COMBUSTION ENGINES
  902     ROTARY REACTOR, SEPARATOR OR TREATER OF EXHAUST OF AN INTERNAL
           COMBUSTION ENGINE
  903     CLOSURES OPERATORS
  904     PROPELLER OR AIR PLANE SYSTEM
  905     WINDING AND REELINGG
  906     ENGINE SPEED RESPONSIVE THROTTLE CONTROL SYSTEM
  907     WORKING MEMBER POSITIONED AGAINST COUNTERFORCE BY CONSTANTLY
           APPLIED MOTIVE FLUID
  908     WASHING MACHINE SYSTEM
  909     REACTION MOTOR OR COMPONENT COMPOSED OF SPECIFIC MATERIAL
  910     FREE PISTON
  911     FLUID MOTOR SYSTEM INCORPORATING ELECTRICAL SYSTEM
  912     COOLING MEANS
  913     COLLECTION OF REGGIO PATENTS
  914     EXPLOSIVE
  915     COLLECTION OF GODDARD PATENTS
  916     UNITARY CONSTRUCTION
  917     SOLID FUEL RAMJET USING PULVERIZED FUEL