F04C2270/052 - CPC Classification Index

#1

20250207583

2025-06-26

FLUID ROTARY MACHINE WITH AN ENCODER MODULE

#2

20240401595

2024-12-05

METHOD FOR CONTROLLING A ROTARY SCREW COMPRESSOR

#3

20240239188

2024-07-18

METHOD FOR CONTROLLING A GEAR PUMP

#4

20240102710

2024-03-28

Refrigerant bypass solution

#5

20230349378

2023-11-02

Fault rectification method for a progressive cavity pump of a conveyor device for conveying viscous building materials

#6

20230279857

2023-09-07

Method for controlling a rotary screw compressor

#7

20230228269

2023-07-20

Variable capacity screw compressor and method

#8

20220170465

2022-06-02

Refrigerant bypass solution

#9

20220082100

2022-03-17

Method for controlling a rotary screw compressor

#10

20220065247

2022-03-03

Method and screw spindle pump for delivering a gas/liquid mixture

#11

20210372405

2021-12-02

Vacuum pumping system having a plurality of positive displacement vacuum pumps and method for operating the same

#12

20210363989

2021-11-25

Machine for depressurizing or compressing gaseous media

#13

20210348620

2021-11-11

Electric pump

#14

20210285447

2021-09-16

Variable capacity screw compressor and method

#15

20190271315

2019-09-05

Method for operating a rolling piston compressor

#16

20190219316

2019-07-18

Scroll unloading detection system

#17

20190120227

2019-04-25

Two-stage variable-displacement oil pump

#18

20180347879

2018-12-06

Air conditioner provided with means for predicting and detecting failure in compressor and method for predicting and detecting the failure

#19

20180291904

2018-10-11

Compressor system with internal air-water cooling

#20

20180291902

2018-10-11

Method for controlling a rotary screw compressor

#21

20180180339

2018-06-28

Scroll unloading detection system

#22

20180106255

2018-04-19

Compressor with liquid injection cooling

#23

20170211573

2017-07-27

Method for twin screw positive displacement pump protection

#24

20170067468

2017-03-09

Compressor

#25

20170051743

2017-02-23

Gas Compressor

#26

20160131138

2016-05-12

Compressor with liquid injection cooling

#27

20160041026

2016-02-11

Method of determining pump flow in twin screw positive displacement pumps

#28

20150226216

2015-08-13

Variable displacement transmission pump and controller with adaptive control

#29

20150030489

2015-01-29

Variable capacity screw compressor and method

#30

20140135999

2014-05-15

Method of determining pump flow in rotary positive displacement pumps

#31

20140119966

2014-05-01

Method for rotary positive displacement pump protection

#32

20140056727

2014-02-27

Refrigerant compressor and refrigeration cycle apparatus using the same

#33

20130209299

2013-08-15

Compressor with liquid injection cooling

#34

20130108494

2013-05-02

Metering gear pump with integral flow indicator

#35

20130064699

2013-03-14

HYDRAULIC TRANSPORT DEVICE AND ELECTROHYDRAULIC CONTROL MODULE

#36

20130039790

2013-02-14

Variable displacement lubricant pump

#37

20120017634

2012-01-26

Variable capacity screw compressor and method

#38

20110243775

2011-10-06

Scroll compressor

#39

20110236244

2011-09-29

Fluid rotary machine with a sensor arrangement

#40

20110236243

2011-09-29

Fluid rotary machine capable of high-accuracy detection of shaft rotation

#41

20110194962

2011-08-11

VANE PUMP WITH VARIABLE DISCHARGE VOLUME

#42

20110048224

2011-03-03

HYDRAULIC PUMP OR HYDRAULIC MOTOR HAVING A ROTATION SPEED SENSOR

#43

20100310403

2010-12-09

Oscillating variable displacement ring pump

#44

20100162706

2010-07-01

Drive for rotating structure

#45

20100098572

2010-04-22

High-speed gear pump

#46

20100043409

2010-02-25

Method and system for controlling the operation of a pump

#47

20080145240

2008-06-19

Control system and method for protection against breakage of lubricanting-oil film in compressor bearings

#48

20080075608

2008-03-27

Electrically operated hydraulic pump

#49

20070111855

2007-05-17

Engine speed-dependent pressure regulation of oil pumps

#50

20070041852

2007-02-22

Rotary compressor

#51

20070003425

2007-01-04

Rotary fluid device performing compression and expansion of fluid within a common cylinder

#52

20060230824

2006-10-19

SPEED SENSOR FLANGE ASSEMBLIES

#53

20060127229

2006-06-15

Variable displacement pump and control therefor

#54

20060104823

2006-05-18

Hydraulic pump with variable flow and variable pressure and electric control

#55

20050265860

2005-12-01

Motor-mounted internal gear pump and electronic device

#56

20050169773

2005-08-04

Oil pump for an automatic transmission of a motor vehicle

#57

20050142006

2005-06-30

Device for pressure regulation of hydraulic pumps

#58

20050118033

2005-06-02

Method for adjusting a volumetric flow-variable positive displacement pump in an internal combustion engine