ClassID:

144141

F04D27/009 - CPC Classification

Classification description:

Control, e.g. regulation, of pumps, pumping installations or systems by bleeding, by passing or recycling fluid

Recent Application in this class:
#1
20260049579
2026-02-19

BLEEDING CORE AIR FROM A TURBINE ENGINE CORE FLOWPATH

#2
20250347287
2025-11-13

COMPRESSOR BLEED SLOTS WITH VARIABLE WALL STRUCTURES

#3
20250116277
2025-04-10

ELECTRIC COMPRESSOR

#4
20250084859
2025-03-13

COMPRESSOR SHROUD WITH CONTROLLABLE BYPASS COMPONENT FORMED OF THERMALLY ADAPTIVE MATERIALS AND A THERMOELECTRIC JUNCTION

#5
20250059920
2025-02-20

Gas turbine engine including a compressor bleed air system

#6
20240368999
2024-11-07

TURBINE OVERSPEED PROTECTION

#7
20240352906
2024-10-24

Ducted firewall with upper bifi bleed for modulated core ventilation

#8
20240229810
2024-07-11

Air cycle machine bypass duct

#9
20240084713
2024-03-14

System for controlling discharge doors of a turbomachine

#10
20240040740
2024-02-01

FAN

#11
20230358248
2023-11-09

Oil feed type air compressor

#12
20230025097
2023-01-26

Centrifugal compressor with recirculation passage

#13
20220412366
2022-12-29

Compressor system

#14
20220341434
2022-10-27

CONTROLLER AND DRIVE CIRCUIT FOR ELECTRIC MOTORS

#15
20220136513
2022-05-05

Gas compressor with a plurality of air realease systems each having an air release valve and an air regulating valve

#16
20220010802
2022-01-13

Centrifugal compressor with recirculation passage

#17
20210381517
2021-12-09

Reverse flow engine architecture

#18
20210372547
2021-12-02

Gimbaled flexure for spherical flex joints

#19
20210332764
2021-10-28

Methods and apparatus to control air flow separation of an engine

#20
20210317775
2021-10-14

Turbocharger including a wastegate assembly

#21
20210277821
2021-09-09

Wastegate assembly and turbocharger including the same

#22
20210262481
2021-08-26

Sealing system, and pump system including the sealing system

#23
20210254876
2021-08-19

Compressor and chiller system having the same

#24
20210197114
2021-07-01

Air Preparation Device of a Vehicle

#25
20210156389
2021-05-27

Automatic fluid pump

#26
20210102546
2021-04-08

Methods and mechanisms for surge avoidance in multi-stage centrifugal compressors

#27
20210095690
2021-04-01

Vehicle driving apparatus

#28
20210048033
2021-02-18

Gas compressor unit for oil wells

#29
20210047966
2021-02-18

System and method of reducing post-shutdown engine temperatures

#30
20210017988
2021-01-21

Gas compressor

#31
20200386111
2020-12-10

Grooved rotor casing system using additive manufacturing method

#32
20200362868
2020-11-19

Variable speed boost compressor for gas turbine engine cooling air supply

#33
20200355192
2020-11-12

Single-stage compressor with bleed system for thrust load alleviation

#34
20200347852
2020-11-05

Single-stage compressor with thrust load suppression section

#35
20200318492
2020-10-08

Tandem stators with flow recirculation conduit

#36
20200309141
2020-10-01

COMPRESSOR INLET ADJUSTMENT MECHANISM

#37
20200291868
2020-09-17

LOUVRE SYSTEM

#38
20200240423
2020-07-30

Turbocharger with control device

#39
20200165966
2020-05-28

ASSEMBLY COMPRISING AN ACTUATOR

#40
20200158103
2020-05-21

Low energy idling for a compressed air system

#41
20200141417
2020-05-07

BOOSTER COMPRESSOR WITH SPEED CHANGE SYSTEM

#42
20200141416
2020-05-07

Reverse flow engine architecture

#43
20200102964
2020-04-02

Centrifugal compressor

#44
20200096002
2020-03-26

AXIAL COMPRESSOR

#45
20200032806
2020-01-30

Bleed air selector valve

#46
20200025010
2020-01-23

Seal assembly for counter rotating turbine assembly

#47
20190360598
2019-11-28

Bleed valves

#48
20190264620
2019-08-29

VALVE DEVICE

#49
20190257250
2019-08-22

Fuel pump systems for turbomachines

#50
20190249681
2019-08-15

Centrifugal compressor with recirculation passage

#51
20190226488
2019-07-25

Compressor bleed port structure

#52
20190186502
2019-06-20

Water-cooled casing treatment

#53
20190162197
2019-05-30

Compressor with offset diffuser for integral bleed

#54
20190128271
2019-05-02

Pump with integrated bypass mechanism

#55
20190128270
2019-05-02

Closed impeller with self-recirculation casing treatment

#56
20190120084
2019-04-25

Gas turbine engine with high speed low pressure turbine section and bearing support features

#57
20190113050
2019-04-18

Multi-piece compressor housing for a turbocharger

#58
20190107113
2019-04-11

Cooling system for compressor and method for operation thereof

#59
20190085711
2019-03-21

Seal assembly for counter rotating turbine assembly

#60
20190072102
2019-03-07

Compressor system equipped for fugitive gas handling and fugitive gas system operating method

#61
20190049161
2019-02-14

Axial flow compressor for HVAC chiller systems

#62
20190040865
2019-02-07

Active surge control in centrifugal compressors using microjet injection

#63
20190024610
2019-01-24

GEARED TURBOFAN GAS TURBINE ENGINE ARCHITECTURE

#64
20180363676
2018-12-20

INLET PRE-SWIRL GAS TURBINE ENGINE

#65
20180363668
2018-12-20

ROTARY MACHINE INCLUDING ACTIVE MAGNETIC BEARING

#66
20180363667
2018-12-20

COMPRESSOR ROTOR AND AXIAL COMPRESSOR

#67
20180355877
2018-12-13

Compressor bleed apparatus for a turbine engine

#68
20180347588
2018-12-06

Centrifugal compressor

#69
20180340546
2018-11-29

Seal assembly and method for reducing aircraft engine oil leakage

#70
20180335050
2018-11-22

Method and system for compressor vane leading edge auxiliary vanes

#71
20180334918
2018-11-22

Actively-driven bleed source switching

#72
20180313364
2018-11-01

COMPRESSOR APPARATUS WITH BLEED SLOT INCLUDING TURNING VANES

#73
20180313271
2018-11-01

Recirculation of fluid through a turbomachine centrifugal pump

#74
20180306044
2018-10-25

Intershaft compartment buffering arrangement

#75
20180298817
2018-10-18

Systems and methods for icing detection of compressors

#76
20180292013
2018-10-11

Solenoid valve

#77
20180291925
2018-10-11

Fan inlet diffuser housing for an air cycle machine system

#78
20180266439
2018-09-20

Clipped heat shield assembly

#79
20180245541
2018-08-30

GEARED TURBOFAN GAS TURBINE ENGINE ARCHITECTURE

#80
20180238350
2018-08-23

Pressure increasing system and method of increasing gas pressure

#81
20180209570
2018-07-26

Flexible joints assembly with flexure rods

#82
20180202589
2018-07-19

Gimbaled flexure for spherical flex joints

#83
20180195528
2018-07-12

Fluid diodes with ridges to control boundary layer in axial compressor stator vane

#84
20180172012
2018-06-21

Reverse flow engine architecture

#85
20180163749
2018-06-14

Adjusting mechanism for centrifugal compressors

#86
20180135650
2018-05-17

Fan frame body with bypass structure and fan thereof

#87
20180127103
2018-05-10

Fully integrated hybrid electric jet engine

#88
20180119643
2018-05-03

Geared turbofan gas turbine engine architecture

#89
20180111183
2018-04-26

COMPLEMENTARY STRUCTURE

#90
20180106260
2018-04-19

Method and apparatus for compressor system pressurization

#91
20180100441
2018-04-12

Bleed valve assembly for a gas turbine engine

#92
20180100440
2018-04-12

Bleed valve assembly for a gas turbine engine

#93
20180073509
2018-03-15

Centrifugal pump assembly

#94
20180058475
2018-03-01

Thermal barrier washer

#95
20180051704
2018-02-22

Heat pump

#96
20180051703
2018-02-22

Variable speed boost compressor for gas turbine engine cooling air supply

#97
20180045214
2018-02-15

Compressor wheel, method of making the same, and turbocharger including the same

#98
20180031002
2018-02-01

Annular heatshield

#99
20180030989
2018-02-01

Rotary machine including active magnetic bearing

#100
20180030987
2018-02-01

Method and apparatus for active clearance control on gas turbine engines

#101
20170363099
2017-12-21

Engine bleed air system with waste gate valve for compressor surge management

#102
20170363098
2017-12-21

BOOSTER COMPRESSOR WITH SPEED CHANGE SYSTEM

#103
20170356469
2017-12-14

Compressor geometry control

#104
20170356457
2017-12-14

Active core cooling system

#105
20170350420
2017-12-07

Ported shroud geometry to reduce blade-pass noise

#106
20170350406
2017-12-07

Stabilizing arrangement for a rotating vertical shaft of a machine, machine and stabilizing method

#107
20170342853
2017-11-30

In-line shutoff valves

#108
20170335796
2017-11-23

GEARED TURBOFAN GAS TURBINE ENGINE ARCHITECTURE

#109
20170335775
2017-11-23

Solenoids for gas turbine engine bleed valves

#110
20170298834
2017-10-19

Geared turbofan gas turbine engine architecture

#111
20170298767
2017-10-19

Gas turbine engine with high speed low pressure turbine section and bearing support features

#112
20170276141
2017-09-28

Compressor bleed systems in turbomachines and methods of extracting compressor airflow

#113
20170268533
2017-09-21

Heat exchanger outlet deflector

#114
20170254273
2017-09-07

GEARED TURBOFAN GAS TURBINE ENGINE ARCHITECTURE

#115
20170254219
2017-09-07

Firewall mount hub

#116
20170248155
2017-08-31

CENTRIFUGAL COMPRESSOR DIFFUSER PASSAGE BOUNDARY LAYER CONTROL

#117
20170234332
2017-08-17

Auxiliary shaft seal flushing system of a centrifugal pump and an axial flow pump

#118
20170227017
2017-08-10

Electrically driven pump

#119
20170222592
2017-08-03

Reducing fault energy from an electric motor drive for a compressor

#120
20170218853
2017-08-03

Methods and apparatus to adjust bleed ports on an aircraft engine

#121
20170211578
2017-07-27

Gas compression process with introduction of excess refrigerant at compressor inlet

#122
20170198719
2017-07-13

Heat exchanger for embedded engine applications: curvilinear plate

#123
20170198705
2017-07-13

Multi-stage compression system, control device, control method, and program

#124
20170191484
2017-07-06

Systems and methods for a compressor diffusion slot

#125
20170191419
2017-07-06

System and method of reducing post-shutdown engine temperatures

#126
20170175754
2017-06-22

Apparatus for pressurizing a fluid within a turbomachine and method of operating the same

#127
20170167805
2017-06-15

Heat exchanger designs using variable geometries and configurations

#128
20170159667
2017-06-08

Venturi effect endwall treatment

#129
20170138308
2017-05-18

Geared turbofan gas turbine engine architecture

#130
20170137116
2017-05-18

EFFICIENCY IMPROVEMENTS FOR FLOW CONTROL BODY AND SYSTEM SHOCKS

#131
20170130736
2017-05-11

Cooling fan coupled with a set of recirculation flaps

#132
20170130734
2017-05-11

Cooling fan coupled with a set of recirculation flaps

#133
20170122326
2017-05-04

CENTRIFUGAL PUMP ASSEMBLY

#134
20170122216
2017-05-04

Geared turbofan gas turbine engine architecture

#135
20170107993
2017-04-20

Air cycle machine compressor housing

#136
20170097017
2017-04-06

Submersible pump and method of pumping fluid

#137
20170074291
2017-03-16

Turbocharger compressor noise reduction system and method

#138
20170074271
2017-03-16

Gas turbine compressor stage

#139
20170030365
2017-02-02

Supercharging device for a combustion engine

#140
20170023023
2017-01-26

Perforated drum of a compressor of an axial turbine engine

#141
20170022996
2017-01-26

Bypass duct fairing for low bypass ratio turbofan engine and turbofan engine therewith

#142
20160376892
2016-12-29

Rotor heat shield

#143
20160376021
2016-12-29

Auxiliary power unit with intercooler

#144
20160348685
2016-12-01

Translating gaspath bleed valve

#145
20160341215
2016-11-24

Compressor tip injector

#146
20160333796
2016-11-17

Rotor disk having a centripetal air collection device, compressor comprising said disc and turbomachine with such a compressor

#147
20160290362
2016-10-06

Compressor or Gas Extraction System

#148
20160265551
2016-09-15

Compound fillet varying chordwise and method to manufacture

#149
20160258440
2016-09-08

GAS TURBINE ENGINE WITH AIRFOIL DAMPENING SYSTEM

#150
20160252081
2016-09-01

Magnetically actuated fluid pump

#151
20160169240
2016-06-16

Turbopump with anti-vibration system

#152
20160146213
2016-05-26

Turbine wastegate plug

#153
20160131148
2016-05-12

Centrifugal compressor and turbocharger

#154
20160061208
2016-03-03

Turbine wastegate

#155
20160040678
2016-02-11

Exhaust-gas turbocharger

#156
20160003046
2016-01-07

Parallel Twin-Impeller Compressor Having Swirl-Imparting Device For One Impeller

#157
20150354589
2015-12-10

Centrifugal compressor with extended operating range

#158
20150330302
2015-11-19

Geared turbofan gas turbine engine architecture

#159
20150292394
2015-10-15

Control device for an exhaust gas guide section of a turbine

#160
20150240826
2015-08-27

Method of determining a pressure upstream of a compressor for an engine equipped with double supercharging

#161
20150233381
2015-08-20

Exhaust-gas turbocharger for use with an internal combustion engine

#162
20150226221
2015-08-13

Actuation device, in particular electronic actuator

#163
20150159664
2015-06-11

COMPRESSOR COVER FOR TURBOCHARGERS

#164
20150132103
2015-05-14

Exhaust-gas turbocharger

#165
20150125273
2015-05-07

Exhaust-gas turbocharger

#166
20150104300
2015-04-16

Housing for turbocharger

#167
20150101481
2015-04-16

Method for improved assembly of an actuator for an air bleed valve of a turbine engine

#168
20150098803
2015-04-09

Exhaust-gas turbocharger having a wastegate valve and having an overrun air recirculation valve

#169
20150093270
2015-04-02

MAGNETICALLY ACTUATED FLUID PUMP AND PULSE REDUCING APPARATUS

#170
20150056062
2015-02-26

Centrifugal compressor

#171
20150044071
2015-02-12

Pump Arrangement

#172
20150004020
2015-01-01

Turbocharger with an annular rotary bypass valve

#173
20150003959
2015-01-01

Gas turbine engine having configurable bypass passage

#174
20150003956
2015-01-01

Variable vane scheduling

#175
20140363269
2014-12-11

Compressor control device and control method therefor, and compressor system

#176
20140321986
2014-10-30

Turbocharger

#177
20140286746
2014-09-25

Compressor shroud reverse bleed holes

#178
20140271138
2014-09-18

Wastegate valve and turbocharger having same

#179
20140208788
2014-07-31

Centrifugal compressor with extended operating range

#180
20140199931
2014-07-17

Dual action check valve with combined return and bypass passages

#181
20140140814
2014-05-22

Turbocharger

#182
20140037426
2014-02-06

Method for controlling a regulated-rotation-speed low-pressure centrifugal fan

#183
20130192200
2013-08-01

Geared turbofan gas turbine engine architecture

#184
20130183136
2013-07-18

Start system for gas turbine engines

#185
20130170948
2013-07-04

Turbocharger bypass system

#186
20130136578
2013-05-30

Turbocharger housing having a valve device, and method for manufacturing a turbocharger housing of said type

#187
20130121807
2013-05-16

Axial compressor for fluid-flow machines

#188
20130121804
2013-05-16

Fluid movement system and method for determining impeller blade angles for use therewith

#189
20130004299
2013-01-03

Heating and ventilation fan for bathroom

#190
20120322358
2012-12-20

Variable-volume exhaust system

#191
20120257990
2012-10-11

Control of subsea compressors

#192
20120224987
2012-09-06

Magnetically actuated fluid pump

#193
20120014789
2012-01-19

Air blowing device

#194
20120014777
2012-01-19

METHOD FOR CONTROLLING A REGULATED-ROTATION-SPEED LOW-PRESSURE CENTRIFUGAL FAN

#195
20110020149
2011-01-27

Air pump for inflatable article

#196
20100032601
2010-02-11

Blow-off valve for turbo blower

#197
20080257286
2008-10-23

Arrangement for Cooling an Internal Combustion Engine of a Motor Vehicle, in Particular Cooling Module

#198
20080232960
2008-09-25

Fluid return in the splitter of turbomachines with bypass-flow configuration

#199
20080092328
2008-04-24

Air reflux assembly of the vacuum cleaner

#200
20070092384
2007-04-26

Cooling system for a blower

#201
20050217267
2005-10-06

Air pump having valve controlled by self-pressure

#202
20050163619
2005-07-28

Hollow fan blade for gas turbine engine

#203
18499790
2024-10-01

Systems and methods for maintaining the prime of a pump

#204
15387482
2017-10-31

Axially translating and radially tilting fan nozzle segments with combined actuation and position sensing

#205
14187836
2016-12-06

High capacity flood pump system