Manual of U.S. Patent Classification
as of June 30, 2000

Class
060
POWER PLANTS

Class definitions may be accessed by clicking on the class title, above.
Subclass definitions may be accessed by clicking on the subclass number, below.

Patents classified in a subclass may be accessed by clicking on the " " icon following the subclass number, below.

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For search strategies, please refer to the Classification Index Explanation of Data web page.

Subclass		Title
ClassTitle		===> POWER PLANTS
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 control
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 supercharged 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 separator
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 expansion
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 oxidizer
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 direction
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 trans