ClassID:

143808

F04C2230/91 - CPC Classification

Classification description:

Manufacture; Improving properties of machine parts Coating

Recent Application in this class:
#1
20250389272
2025-12-25

SCREW COMPRESSOR WITH MULTI-LAYERED COATING OF THE ROTOR SCREWS

#2
20250354554
2025-11-20

SCROLL COMPRESSOR

#3
20250154952
2025-05-15

UNIAXIAL ECCENTRIC SCREW PUMP

#4
20250122874
2025-04-17

SCROLL COMPRESSOR AND METHOD FOR PRODUCING ECCENTRIC BUSH NECESSARY FOR SCROLL COMPRESSOR

#5
20250092873
2025-03-20

LOW COEFFICIENT OF EXPANSION ROTORS FOR VACUUM BOOSTERS

#6
20250035116
2025-01-30

VACUUM PUMP, PROTECTIVE NET, AND CONTACT PART

#7
20240426299
2024-12-26

LOW COEFFICIENT OF EXPANSION ROTORS FOR BLOWERS

#8
20240309869
2024-09-19

SCREW COMPRESSOR WITH MULTI-LAYERED COATING OF THE ROTOR SCREWS

#9
20240209857
2024-06-27

PUMP AND METHOD OF MANUFACTURING A SEALING

#10
20240200556
2024-06-20

Compressor with chromium nitride and titanium nitride layers

#11
20240110565
2024-04-04

Rotor assembly, compressor and air conditioner

#12
20240026880
2024-01-25

Mud motor rotor with core and shell

#13
20230400023
2023-12-14

Orbiting scroll platter mass reduction

#14
20230366399
2023-11-16

Low coefficient of expansion rotors for blowers

#15
20230323878
2023-10-12

DRY VACUUM PUMP AND MANUFACTURING METHOD

#16
20230304497
2023-09-28

Roots pump containing rotors that capture and discharge a foreign substance

#17
20230265849
2023-08-24

Low coefficient of expansion rotors for vacuum boosters

#18
20230258180
2023-08-17

Screw compressor with multi-layered coating of the rotor screws

#19
20220389928
2022-12-08

CROSSLINKED FLUORORESIN-COATED PUMP ROTOR MANUFACTURING METHOD, CROSSLINKED FLUORORESIN-COATED PUMP ROTOR, CROSSLINKED FLUORORESIN-COATED PUMP COVER MANUFACTURING METHOD, AND CROSSLINKED FLUORORESIN-COATED PUMP COVER

#20
20220388028
2022-12-08

Crosslinked fluororesin-coated rotor manufacturing method

#21
20220226853
2022-07-21

A DEVICE FOR PAINTING A COMPRESSOR OR VACUUM PUMP HOUSING AND METHOD APPLIED

#22
20220034314
2022-02-03

METAL FELT AND BRUSH STRUCTURES AS SEALING ELEMENTS IN METAL-METAL MUD MOTORS

#23
20220026125
2022-01-27

PHOBIC/PHILIC STRUCTURES IN REFRIGERATION SYSTEMS AND LIQUID VAPOR SEPARATION IN REFRIGERATION SYSTEMS

#24
20210396139
2021-12-23

Rotary vane pump

#25
20210388833
2021-12-16

Screw pump with abradable coating

#26
20210332818
2021-10-28

Compressor for refrigerating machine

#27
20210310487
2021-10-07

Low coefficient of expansion rotors for blowers

#28
20210285449
2021-09-16

Compressor assembly, compressor, and method of manufacturing compressor

#29
20210277719
2021-09-09

Mud motor rotor with core and shell

#30
20210270265
2021-09-02

Low coefficient of expansion rotors for vacuum boosters

#31
20210262465
2021-08-26

ROTARY POSITIVE DISPLACEMENT PUMPS

#32
20210131433
2021-05-06

FLUID MACHINE

#33
20210062655
2021-03-04

Rotary machine

#34
20200370555
2020-11-26

VOLUMETRIC DOSING PUMP AND DOSING SYSTEM COMPRISING AT LEAST ONE OF SUCH PUMPS

#35
20200240411
2020-07-30

Screw compressor with multi-layered coating of the rotor screws

#36
20200200172
2020-06-25

Liquid-ring vacuum pump having internal inspection and foreign matter removal functions

#37
20200116148
2020-04-16

TWIN ROTOR DEVICES WITH INTERNAL CLEARANCES REDUCED BY A COATING AFTER ASSEMBLY, A COATING SYSTEM, AND METHODS

#38
20200064035
2020-02-27

Phobic/philic structures in refrigeration systems and liquid vapor separation in refrigeration systems

#39
20200040892
2020-02-06

Liquid refrigerant pump having single fixed scroll and two non-contacting orbiting scrolls to pump fluid and provide pressurized fluid to thrust bearing area

#40
20200025195
2020-01-23

CAVITATION RESISTANT GEAR DRIVEN FUEL PUMP

#41
20190383290
2019-12-19

Compressor system with purge gas system

#42
20190351451
2019-11-21

Method of lining an inner surface of a tubular and system for doing same

#43
20190338774
2019-11-07

Compressor for refrigerating machine

#44
20190063434
2019-02-28

Component-replaceable water ring vacuum pump

#45
20180328359
2018-11-15

Method for impregnating the stator of a progressive cavity assembly with nanoparticles

#46
20180320445
2018-11-08

Reinforced directional drilling assemblies and methods of forming same

#47
20180299175
2018-10-18

REFRIGERATION CYCLE DEVICE

#48
20180291740
2018-10-11

Rotary machine with pressure relief mechanism

#49
20180223835
2018-08-09

Wear-resistant coating for oil pump cavity

#50
20180142685
2018-05-24

BEARING FACES WITH FLUID CHANNELS FOR GEAR PUMPS

#51
20180106152
2018-04-19

Hydraulic machine

#52
20180023516
2018-01-25

Natural gas fueled vehicle

#53
20170342837
2017-11-30

Scroll fluid machine

#54
20170321698
2017-11-09

System and Method for Improved Performance of Gerotor Compressors and Expanders

#55
20170306956
2017-10-26

Scroll compressor with coated sliding surface

#56
20170292519
2017-10-12

Compressor having sound isolation feature

#57
20170292518
2017-10-12

Compressor having sound isolation feature

#58
20170218954
2017-08-03

Sliding member for a compressor

#59
20170211389
2017-07-27

Rotary piston and cylinder devices

#60
20170189936
2017-07-06

Method of lining an inner surface of a tubular and system for doing same

#61
20170167486
2017-06-15

SCROLL TYPE FLUID MACHINE, METHOD AND DEVICE FOR FORMING ELASTIC COATING THEREON

#62
20170159658
2017-06-08

Scroll compressor with controlled pressing force

#63
20170146012
2017-05-25

Twin rotor devices with internal clearances reduced by a coating after assembly, a coating system, and methods

#64
20170130643
2017-05-11

COMPOSITE ROTARY COMPONENT

#65
20170101988
2017-04-13

Integrated pressure plate and port plate for pump

#66
20170067508
2017-03-09

Bearing and scroll-type fluid machine

#67
20170067466
2017-03-09

Scroll compressor

#68
20170003057
2017-01-05

Rotary compressor

#69
20160238007
2016-08-18

Scroll member and scroll-type fluid machine

#70
20160208611
2016-07-21

Bearing faces with fluid channels for gear pumps

#71
20160169226
2016-06-16

Liquid ring fluid flow machine

#72
20160138593
2016-05-19

Rotary compressor having vane that has diamond-like carbon layer

#73
20160123147
2016-05-05

Scroll expander

#74
20160115950
2016-04-28

Compressor, oil-free screw compressor, and method of manufacturing casing used therefor

#75
20160108916
2016-04-21

Rotor with a resin layer that has circular or spiral grooves

#76
20160076148
2016-03-17

Protecting a target pump interior with an ALD coating

#77
20150316052
2015-11-05

Nitrogen- and ceramic-surface-treated components for downhole motors and related methods

#78
20150276287
2015-10-01

Phobic/philic structures in refrigeration systems and liquid vapor separation in refrigeration systems

#79
20150267702
2015-09-24

Gerotor with reduced leakage

#80
20150259983
2015-09-17

Components and motors for downhole tools and methods of applying hardfacing to surfaces thereof

#81
20150226364
2015-08-13

Method of lining an inner surface of a tubular and system for doing same

#82
20150225593
2015-08-13

Method for smoothing a perfluoro alkoxy alkane film surface

#83
20150211519
2015-07-30

Electric pump

#84
20150192123
2015-07-09

Hydraulic tools including inserts and related methods

#85
20150152868
2015-06-04

Compressor having sound isolation feature

#86
20150118090
2015-04-30

Components for compressors having electroless coatings on wear surfaces

#87
20150036955
2015-02-05

Sliding member and manufacturing method therefor

#88
20150030492
2015-01-29

Rotary machine

#89
20140377112
2014-12-25

Nitrogen- and ceramic-surface-treated components for downhole motors and related methods

#90
20140356210
2014-12-04

Scroll compressor having a bush bearing provided on a boss of orbiting scroll

#91
20140322058
2014-10-30

Oil-free screw compressor coated with a base resin, a solid lubricant and a heat-resistant additive

#92
20140295059
2014-10-02

Refurbishment process of the pumping unit in a volumetric screw compressor of the ‘oil free’ type

#93
20140294639
2014-10-02

Rotary compressor

#94
20140219845
2014-08-07

Rotary systems lubricated by fluid being processed

#95
20140178235
2014-06-26

Electroformed stator tube for a progressing cavity apparatus

#96
20140154116
2014-06-05

Scroll compressor

#97
20140086776
2014-03-27

Surface treating agent for wear-resistance surface, manufacturing method thereof and compressor using the same

#98
20140064997
2014-03-06

Asymmetric lobes for motors and pumps

#99
20140054091
2014-02-27

Coatings for fluid energy device components

#100
20140044583
2014-02-13

Process for manufacturing casing, and vacuum pump

#101
20140023540
2014-01-23

Anti-wear coatings for scroll compressor wear surfaces

#102
20140010696
2014-01-09

Axial disc and gear pump with axial disc

#103
20130302518
2013-11-14

Method for forming coating on scroll type fluid machine

#104
20130280117
2013-10-24

Compressor with different resin hardness layers

#105
20130280116
2013-10-24

Compressor with sliding member resin layer

#106
20130164154
2013-06-27

Elastomer compositions with silane functionalized silica as reinforcing fillers

#107
20130118247
2013-05-16

Reinforced directional drilling assemblies and methods of forming same

#108
20130108499
2013-05-02

Vane cell machine

#109
20130108498
2013-05-02

Vane cell machine having plates containing axial moving inserts bearing against the rotor

#110
20130094985
2013-04-18

Rotary piston pump and method for operating a rotary piston pump

#111
20130052072
2013-02-28

LUBRICATION OF SCREW MACHINES

#112
20130025941
2013-01-31

Methods of coating wellbore tools and components having such coatings

#113
20130014995
2013-01-17

Downhole motor with diamond-like carbon coating on stator and/or rotor and method of making said downhole motor

#114
20130011287
2013-01-10

Pump or turbine for incompressible fluids

#115
20120273133
2012-11-01

SURFACE PROTECTIVE FILM, GAS CONTACT MEMBER, GAS PROCESSING APPARATUS, AND MECHANICAL PUMP

#116
20120219448
2012-08-30

Adjustable rotary pump with reduced wear

#117
20120216401
2012-08-30

NANOCOMPOSITE MOINEAU DEVICE

#118
20120174617
2012-07-12

Refrigerant compressor and refrigeration cycle apparatus

#119
20120134868
2012-05-31

ROTARY SLIDING-VANE COMPRESSOR

#120
20120134861
2012-05-31

Downhole motor or pump components, method of fabrication the same, and downhole motors incorporating the same

#121
20120102738
2012-05-03

Method of Making Progressing Cavity Pumping Systems

#122
20120100029
2012-04-26

Screw compressor

#123
20120087822
2012-04-12

Compressor with steel and cast iron sliding materials

#124
20120024632
2012-02-02

DOWNHOLE SEAL AND METHOD OF LUBRICATING A DOWNHOLE TOOL

#125
20120018227
2012-01-26

Components and motors for downhole tools and methods of applying hardfacing to surfaces thereof

#126
20120015109
2012-01-19

FLUOROPOLYMER-CONTAINING FILMS FOR USE WITH POSITIVE-DISPLACEMENT FLUID PUMPS

#127
20110311384
2011-12-22

TEMPORARY SELF-LUBRICATING COATING FOR SCROLL COMPRESSOR

#128
20110305589
2011-12-15

Helical gear pump

#129
20110206550
2011-08-25

Vane for a single-vane vacuum pump

#130
20110182760
2011-07-28

Adjustable rotary pump with reduced wear

#131
20110169651
2011-07-14

Open circuit wear sensor for use with a conductive wear counterface

#132
20110150686
2011-06-23

Progressive cavity hydraulic machine

#133
20110116960
2011-05-19

Stator inserts, methods of fabricating the same, and downhole motors incorporating the same

#134
20110081264
2011-04-07

Scroll compressor

#135
20110058970
2011-03-10

ROTARY COMPRESSOR AND METHOD

#136
20110052439
2011-03-03

Refrigerant compressor and refrigerating cycle device

#137
20110038713
2011-02-17

Dry running flexible impeller pump and method of manufacture

#138
20110014079
2011-01-20

Fluid injected screw compressor element

#139
20100284845
2010-11-11

Scroll fluid machine with a coating layer

#140
20100284844
2010-11-11

METHOD FOR MANUFACTURING COMPRESSOR SLIDER, AND COMPRESSOR

#141
20100269617
2010-10-28

METHOD OF PRODUCING A POLYMER COATING

#142
20100260620
2010-10-14

Screw compressor with capacity control slide valve

#143
20100213786
2010-08-26

Electric machine having rotor and stator configurations

#144
20100202911
2010-08-12

SCROLL-TYPE POSITIVE DISPLACEMENT APPARATUS WITH PLASTIC SCROLLS

#145
20100196183
2010-08-05

Scroll compressor with materials to allow run-in

#146
20100192921
2010-08-05

Fuel pump, in particular for a fuel system of a piston engine

#147
20100183468
2010-07-22

Single screw compressor structure and method of assembling single screw compressor including the same

#148
20100178518
2010-07-15

Method for manufacturing a machine housing having a surface-hardened fluid chamber

#149
20100098569
2010-04-22

Nanocomposite Moineau device

#150
20100095837
2010-04-22

Abradable dry film lubricant and the method for applying same and article made therefrom

#151
20100086425
2010-04-08

Electroformed stator tube for a progressing cavity apparatus

#152
20100080723
2010-04-01

Overmolded rotor

#153
20100038142
2010-02-18

APPARATUS AND METHOD FOR HIGH TEMPERATURE DRILLING OPERATIONS

#154
20100028187
2010-02-04

SUPPLEMENT LUBRICANT FREE PNEUMATIC MOTOR

#155
20090325828
2009-12-31

Energy conversion device and method of reducing friction therein

#156
20090301887
2009-12-10

Metal part and method of manufacturing metal part

#157
20090280018
2009-11-12

Compressor with thrust bearing having insular pressure- receiving portions on sliding surface and diamond-like carbon layer on another sliding surface

#158
20090220371
2009-09-03

METHODS FOR DIMENSIONAL RESTORATION OF ROOTS TYPE BLOWER ROTORS, RESTORED ROTORS, AND APPARATUS HAVING RESTORED ROTOR

#159
20090208357
2009-08-20

Rotary gear pump for use with non-lubricating fluids

#160
20090191079
2009-07-30

Temporary self-lubricating coating for scroll compressor

#161
20090136374
2009-05-28

Vane pump with coated vanes

#162
20090098002
2009-04-16

PROCESS FOR HARDFACING A METAL BODY

#163
20090087563
2009-04-02

COATING OF DISPLACER COMPONENTS (TOOTH COMPONENTS) FOR PROVIDING A DISPLACER UNIT WITH CHEMICAL RESISTANCE AND TRIBOLOGICAL PROTECTION AGAINST WEAR

#164
20090068049
2009-03-12

Rotary device and oil pump having α-alumina and zirconia coating

#165
20090068047
2009-03-12

Closed Type Fluid Machine

#166
20080292486
2008-11-27

Rotary blower with corrosion-resistant abradable coating

#167
20080292452
2008-11-27

Housing for a supercharger assembly

#168
20080282836
2008-11-20

Wear-resistant coating and process for producing it

#169
20080247896
2008-10-09

Fluoropolymer-containing films for use with positive-displacement fluid pumps

#170
20080232993
2008-09-25

Fastener member and gas compressor using the same

#171
20080206086
2008-08-28

Slide valve

#172
20080181802
2008-07-31

Scroll fluid machine with a coating layer

#173
20080163473
2008-07-10

Method of manufacture, remanufacture, or repair of a compressor

#174
20080078503
2008-04-03

Mechanical pump operating well for a long term and method of manufacturing the same

#175
20080069715
2008-03-20

PROCESS FOR HARDFACING A PROGRESSING CAVITY PUMP/MOTOR ROTOR

#176
20080038135
2008-02-14

CORROSION RESISTANT HYDRAULIC MOTOR

#177
20080025861
2008-01-31

Sliding Element and Fluid Machine

#178
20070292294
2007-12-20

Scroll compressor with thrustplate peeling prevention

#179
20070253855
2007-11-01

Pump apparatus and power steering

#180
20070248481
2007-10-25

ADJUSTABLE ROTARY PUMP WITH REDUCED WEAR

#181
20070224068
2007-09-27

Ductile cast iron scroll compressor

#182
20070224065
2007-09-27

Coat Pump Assembly

#183
20070196229
2007-08-23

Gear pump for pumping abrasive well fluid

#184
20070189912
2007-08-16

Advanced scroll compressor, vacuum pump, and expander

#185
20070104603
2007-05-10

Scroll and manufacture method therefor

#186
20070071921
2007-03-29

PROCESS FOR HARDFACING A PROGRESSING CAVITY PUMP/MOTOR ROTOR

#187
20070059529
2007-03-15

Wear-resistant coating and process for producing it

#188
20070041860
2007-02-22

Rotary vane air pump

#189
20070031275
2007-02-08

Fluid machinery

#190
20060279155
2006-12-14

Electric machine having a high-torque switched reluctance motor

#191
20060239849
2006-10-26

Gerotor apparatus for a quasi-isothermal Brayton cycle engine

#192
20060165544
2006-07-27

Apparatus having a housing and having at least one rotating component disposed in the housing

#193
20060162546
2006-07-27

Sealing member of a compressor

#194
20060153722
2006-07-13

Pump with side surface coating

#195
20060090465
2006-05-04

Rotary positive displacement machine with orbiting piston

#196
20060088427
2006-04-27

Roots compressor

#197
20050152793
2005-07-14

Scroll compressor with wrap walls provided with an abradable coating and a load-bearing surface at radially outer locations

#198
20050084390
2005-04-21

Refrigerant compressor and friction control process therefor

#199
20050000214
2005-01-06

Rotary positive displacement machine