ClassID:

144137

F04D27/005 - CPC Classification

Classification description:

Control, e.g. regulation, of pumps, pumping installations or systems by changing flow path between different stages or between a plurality of compressors; Load distribution between compressors

Recent Application in this class:
#1
20260078763
2026-03-19

SMART FAN COMPATIBLE WITH VARIOUS CONTROL BOX

#2
20260028973
2026-01-29

MULTI-PRESSURE INTEGRATED AIR PUMP

#3
20250393159
2025-12-25

OPTIMIZED AIRFLOW MANAGEMENT SYSTEM FOR REDUNDANT FANS

#4
20250382968
2025-12-18

SYSTEM AND METHOD OF SETTING FAN WEIGHTS BASED ON EVOLUTIONARY STRATEGY

#5
20250122881
2025-04-17

MANUAL INFLATION AND DEFLATION ADJUSTMENT STRUCTURE FOR A PUMP

#6
20240141910
2024-05-02

Manual inflation and deflation adjustment structure for a pump

#7
20240003357
2024-01-04

CENTRIFUGAL COMPRESSOR FOR REFRIGERATION SYSTEM AND REFRIGERATION SYSTEM

#8
20230332587
2023-10-19

MULTI-PRESSURE INTEGRATED AIR PUMP

#9
20230093808
2023-03-30

Manual inflation and deflation adjustment structure for a pump

#10
20220397117
2022-12-15

Process and apparatus for operating a compression system

#11
20220349414
2022-11-03

Interstage capacity control valve with side stream flow distribution and flow regulation for multi-stage centrifugal compressors

#12
20220125214
2022-04-28

Built-in air pump assembly

#13
20220065255
2022-03-03

MULTISTAGE CENTRIFUGAL PUMP FOR CONVEYING A FLUID

#14
20220049693
2022-02-17

Method for Controlling a Compressor Installation

#15
20220010788
2022-01-13

Multiple chamber vacuum exhaust system

#16
20210340988
2021-11-04

Interstage capacity control valve with side stream flow distribution and flow regulation for multi-stage centrifugal compressors

#17
20210285460
2021-09-16

METHOD FOR CONTROLLING FLOW SEPARATION ON SUCTION SURFACE OF STATOR BLADE OF AXIAL COMPRESSOR/FAN BY MEANS OF MICRO AIR INJECTION

#18
20210270278
2021-09-02

Universal fan system and configuration method

#19
20210215162
2021-07-15

SPLIT-SYSTEM HEAT-AIR CONDITIONING

#20
20210172448
2021-06-10

Automated fan adjustment system

#21
20210040951
2021-02-11

Controllable pitot device and method

#22
20210003120
2021-01-07

Multi-pressure integrated air pump

#23
20200400154
2020-12-24

Gas compressor and control method therefor

#24
20200386237
2020-12-10

Multichannel air pump

#25
20200386235
2020-12-10

Manual inflation and deflation adjustment structure for a pump

#26
20200200180
2020-06-25

Air pump for an inflatable body

#27
20190249680
2019-08-15

Built-in air pump

#28
20190159409
2019-05-30

Blower/mulcher

#29
20190154045
2019-05-23

Method for controlling fans and a group of fans

#30
20190136860
2019-05-09

Blower system for blowing fluid off of a passing vehicle

#31
20190041814
2019-02-07

Fan characterization and control system

#32
20180314274
2018-11-01

GAS PROCESSING AND MANAGEMENT SYSTEM FOR SWITCHING BETWEEN OPERATING MODES

#33
20180170147
2018-06-21

HVAC system inlet assembly

#34
20180058461
2018-03-01

SYSTEM FOR PRODUCING ENERGY OR TORQUE

#35
20180023579
2018-01-25

Blower

#36
20170363097
2017-12-21

Electronic device and control method thereof

#37
20170298966
2017-10-19

Magnetically controlled valve and pump devices and methods of using the same

#38
20170241423
2017-08-24

Blower

#39
20170159652
2017-06-08

Method for controlling a compressor installation

#40
20170152856
2017-06-01

Load sharing control for compressors in series

#41
20170084967
2017-03-23

Battery pack flow control system with fan assembly

#42
20160360650
2016-12-08

Air-moving assemblies with flywheels

#43
20160252098
2016-09-01

Systems and methods for axial compressor with secondary flow

#44
20160215780
2016-07-28

Built-in electric air pumps for inflating objects

#45
20160088764
2016-03-24

Air-moving assemblies with flywheels

#46
20160084257
2016-03-24

Air-moving assemblies with flywheels

#47
20150373877
2015-12-24

System and method for improving fan life in an information handling system

#48
20150369253
2015-12-24

System and method for improving fan life in an information handling system

#49
20150275905
2015-10-01

Electric device including an electric fan which generates airflow at a time of low-temperature startup

#50
20150184660
2015-07-02

Methods and systems for subsea boosting with direct current and alternating current power systems

#51
20150147193
2015-05-28

Load sharing control for compressors in series

#52
20150132838
2015-05-14

Ventilation unit for flow reversal

#53
20150114476
2015-04-30

Method and Apparatus for Adjusting Operating Parameters of a Vacuum Pump Arrangement

#54
20150050128
2015-02-19

COMPACT MULTI-STAGE TURBO PUMP

#55
20140157812
2014-06-12

Refrigerator having centrifugal fan-duct assembly

#56
20130195678
2013-08-01

Apparatus and method for controlling compressor, and refrigerator having the same

#57
20130049662
2013-02-28

FAN CONTROL SYSTEM AND METHOD

#58
20120219399
2012-08-30

Electric device including an electric fan and a control unit for controlling the electric fan

#59
20110286860
2011-11-24

Method for Controlling a Compressor Installation

#60
20110076935
2011-03-31

Ventilation group for flow reversal

#61
20080232982
2008-09-25

Single Direction Air Pump Assembly with Dual Flowpaths

#62
20060285967
2006-12-21

Blower for air conditioner of automotive vehicles

#63
19293033
2026-02-10

Dual-duct air pump

#64
18739553
2025-02-11

Integrated inflation and deflation air pump