Patents-Review.com
ClassID:

144082 ⎘

F04D19/024 - CPC Classification

Classification description:

Axial-flow pumps; Multi-stage pumps with contrarotating parts

Recent Application in this class:
#1
20260092608
2026-04-02

BLOWER

 #2
20260063130
2026-03-05

IMPELLER AND BLOWING APPARATUS INCLUDING THE SAME

 #3
20250389191
2025-12-25

EFFICIENT GAS TURBINE ENGINE INSTALLATION AND OPERATION

 #4
20250287886
2025-09-18

AXIAL BLOWER VACUUM

 #5
20250243865
2025-07-31

COUNTER-ROTATING FAN AND HEAT DISSIPATING DEVICE

 #6
20250084854
2025-03-13

FAN ASSEMBLY

 #7
20250067268
2025-02-27

THRUST-BALANCING DEVICE FOR GENERATING POWER

 #8
20240392793
2024-11-28

ROTATING MACHINE HAVING CONTRA-ROTATING PROPELLER

 #9
20240337264
2024-10-10

ARRANGEMENT FOR PRESSURIZING OF FLUID

 #10
20240035480
2024-02-01

Multi-stage compressor assembly having rows of blades arranged to rotate in counter-opposite rotational directions

 #11
20230323789
2023-10-12

Gas turbine engine with third stream

 #12
20230287890
2023-09-14

Vaneless contra-rotating compressor with multiple contra-rotating interfaces

 #13
20230235740
2023-07-27

Arrangement for pressurizing of fluid

 #14
20230078022
2023-03-16

Fan apparatus and air conditioner outdoor unit

 #15
20220403743
2022-12-22

Efficient gas turbine engine installation and operation

 #16
20220389862
2022-12-08

Compressor with counter-rotating blade rows

 #17
20220349409
2022-11-03

Fan

 #18
20220341431
2022-10-27

Fluid heat exchanger with pump

 #19
20220333604
2022-10-20

Counter-rotating axial air moving device structure

 #20
20220325717
2022-10-13

Counter-rotating axial air moving device

 #21
20220228593
2022-07-21

Axial and downstream compressor assembly

 #22
20220220963
2022-07-14

Thrust-balancing wet gas compressor

 #23
20220195917
2022-06-23

Architecture of a turbomachine with counter-rotating turbine

 #24
20220170469
2022-06-02

Counter-Rotating Fan Assembly

 #25
20210388839
2021-12-16

Counter-rotating fan

 #26
20210388838
2021-12-16

Counter-rotating fan

 #27
20210332828
2021-10-28

FAN AND AIR CONDITIONER INDOOR UNIT HAVING THE SAME

 #28
20210207483
2021-07-08

Efficient gas turbine engine installation and operation

 #29
20210199119
2021-07-01

Fan with synchronously switch for rotation directions

 #30
20210079926
2021-03-18

Cooling module with blower system having opposite, blower and impeller outlets for information handling systems

 #31
20200378403
2020-12-03

Blower

 #32
20200378388
2020-12-03

Contra-rotating fan structure

 #33
20200300268
2020-09-24

SYSTEMS AND METHODS FOR FLYING SHEET MATERIALS

 #34
20200291785
2020-09-17

Efficient gas turbine engine installation and operation

 #35
20200263545
2020-08-20

Electric turbomachine

 #36
20200149537
2020-05-14

Inline axial flow fan

 #37
20200149535
2020-05-14

Inline axial flow fan

 #38
20200095999
2020-03-26

Blower apparatus

 #39
20200072229
2020-03-05

Thrust-balancing wet gas compressor

 #40
20200056618
2020-02-20

Axial fan configurations

 #41
20200018317
2020-01-16

Arrangement for pressurizing of fluid

 #42
20190390683
2019-12-26

Counter rotating back-to-back fluid movement system

 #43
20190390677
2019-12-26

Axial fan

 #44
20190309705
2019-10-10

Aft counter-rotating boundary layer ingestion engine

 #45
20190301473
2019-10-03

Counter-rotating axial flow fan

 #46
20190301472
2019-10-03

COUNTER-ROTATING FAN

 #47
20190211844
2019-07-11

Systems and methods for flying sheet materials

 #48
20190145415
2019-05-16

System for moving fluid with opposed axial forces

 #49
20190128137
2019-05-02

Structure for mitigating vibratory modes of counter-rotating engine rotors

 #50
20190112933
2019-04-18

Erosion resistant blades for compressors

 #51
20190040872
2019-02-07

Two-stage blade adjusting device for counter-rotating axial flow fan

 #52
20180249873
2018-09-06

Fan unit and cleaner having the same

 #53
20180223872
2018-08-09

Systems and methods for flying sheet materials

 #54
20180119562
2018-05-03

Power transmission system for turbines or compressors having counter-rotating blades

 #55
20180080451
2018-03-22

Ventilation apparatus with counter-rotating impellers driven by long shaft

 #56
20180073511
2018-03-15

Variable inlet vanes

 #57
20180073510
2018-03-15

Variable inlet vanes

 #58
20170159665
2017-06-08

Multistage turbomachine with embedded electric motors

 #59
20170022994
2017-01-26

Surge free subsea compressor

 #60
20160333886
2016-11-17

AXIAL COMPRESSOR AND USE OF AN AXIAL COMPRESSOR

 #61
20160230768
2016-08-11

AXIAL COMPRESSOR CONFIGURATION

 #62
20160219754
2016-07-28

Variable inlet vanes

 #63
20160215783
2016-07-28

Variable inlet vanes

 #64
20160215779
2016-07-28

Variable inlet vanes

 #65
20160115793
2016-04-28

Compressor for an axial turbine engine with double contra-rotating rotors

 #66
20160102607
2016-04-14

Compressor of axial turbine engine with contra-rotating rotor

 #67
20160097394
2016-04-07

Fluid flow apparatus, fan assembly and associated method

 #68
20150369250
2015-12-24

Turbine apparatus with counter-rotating blades

 #69
20150275903
2015-10-01

Rotor of a supercharging device

 #70
20150226223
2015-08-13

Contra-rotating transmission

 #71
20150204339
2015-07-23

System for holding blades and assembly method

 #72
20150127188
2015-05-07

Reversible contra-rotating fan system

 #73
20140286749
2014-09-25

Multi-stage axial compressor with counter-rotation using accessory drive

 #74
20140234072
2014-08-21

Multiple spool turbocharger

 #75
20140147253
2014-05-29

Counter rotating helico-axial pump

 #76
20140147243
2014-05-29

Contra rotating wet gas compressor

 #77
20130223984
2013-08-29

Multi-stage axial compressor with counter-rotation

 #78
20130156583
2013-06-20

Airfoils including tip profile for noise reduction and method for fabricating same

 #79
20130136587
2013-05-30

Centrifugal compressor

 #80
20130115083
2013-05-09

TURBINE ENGINE HAVING TWO UNDUCTED PROPELLERS

 #81
20120301271
2012-11-29

Supersonic compressor rotor and method of compressing a fluid

 #82
20120275937
2012-11-01

CIRCULATION BOOSTING AND VENTILATING AIR COMPRESSOR

 #83
20120257957
2012-10-11

Counter-rotating axial flow fan

 #84
20110311361
2011-12-22

System of compact contra-rotating propellers

 #85
20110174011
2011-07-21

VENTILATING DEVICE AND OUTDOOR UNIT HAVING THE SAME

 #86
20110171021
2011-07-14

Double-stacked blade ceiling fan and method of operation and method of circulating air

 #87
20110142614
2011-06-16

Counter-rotating axial flow fan

 #88
20110142612
2011-06-16

Counter-rotating axial flow fan

 #89
20110142611
2011-06-16

Counter-rotating axial flow fan

 #90
20110142592
2011-06-16

Supersonic compressor rotor

 #91
20110074158
2011-03-31

Turbo-machine having at least two counter-rotatable rotors and having mechanical torque compensation

 #92
20110052433
2011-03-03

Fan having two impellers

 #93
20100301617
2010-12-02

Gas turbine engine

 #94
20100260616
2010-10-14

Method of controlling counter-rotating axial-flow fan

 #95
20100158665
2010-06-24

Supersonic compressor

 #96
20100054931
2010-03-04

Serial axial fan

 #97
20090175745
2009-07-09

Blower Unit for Vehicle

 #98
20090107254
2009-04-30

System and method for dynamometer testing of motor vehicles, including a cooling device

 #99
20090067983
2009-03-12

Centerline compression turbine engine

 #100
20090047118
2009-02-19

Counter-rotating axial-flow fan

 #101
20080260530
2008-10-23

Counter-rotating axial-flow fax

 #102
20080260526
2008-10-23

COUNTER-ROTATING AXIAL-FLOW FAN

 #103
20080095623
2008-04-24

COUNTER-ROTATING FAN

 #104
20070264123
2007-11-15

COUNTER-ROTATING FAN

 #105
20070059155
2007-03-15

Counter-rotating axial-flow fan

 #106
20060280601
2006-12-14

Cooling fan assembly for electric apparatus

 #107
20060093473
2006-05-04

Integrated turbo/drag/regenerative pump with counter-rotating turbo blades

 #108
20050249598
2005-11-10

Ceiling fan with multiple motors

 #109
20050172610
2005-08-11

Turbojet having two counter-rotatable fans secured to a counter-rotatable low-pressure compressor

 #110
20050110366
2005-05-26

Heat-dissipating device and motor structure thereof

 #111
20050106026
2005-05-19

Counterrotating axial blower

 #112
19012703
2025-12-30

Dual-motor coaxial different-direction dual-propeller structure of electric paramotor

 #113
17688753
2022-12-27

Thin type counter-rotating axial air moving device

 #114
16437356
2020-02-04

Efficient gas turbine engine installation and operation

 #115
14176452
2015-02-10

Contra-rotating axial fan transmission for evaporative and non-evaporative cooling and condensing equipment