ClassID:

151761

F16J9/20 - CPC Classification

Classification description:

Piston-rings, e.g. non-metallic piston-rings , seats therefor; Ring sealings of similar construction; Details Rings with special cross-section ; Oil-scraping rings

Sub-classes:
Recent Application in this class:
#1
20260117867
2026-04-30

PISTON RING SET

#2
20260117866
2026-04-30

Compression Ring

#3
20260055813
2026-02-26

OIL CONTROL RING

#4
20260049659
2026-02-19

PISTON RING AND METHOD FOR MANUFACTURING A PISTON RING

#5
20250198513
2025-06-19

PISTON RING ASSEMBLY

#6
20250198432
2025-06-19

System And Method For Protecting A Hydraulic System Of A Work Machine

#7
20250188855
2025-06-12

Two-Stroke Engine, Lubrication Device, and Cylinder

#8
20250179971
2025-06-05

INTERNAL COMBUSTION ENGINE WITH MEANS FOR CONDENSATION FLUID REMOVAL

#9
20250172105
2025-05-29

INTERNAL COMBUSTION ENGINE

#10
20250116331
2025-04-10

Piston ring

#11
20250020208
2025-01-16

DUAL-PEAK STATIC SEAL FOR HYDRAULIC DEVICE

#12
20240418262
2024-12-19

PISTON RING

#13
20240376982
2024-11-14

Compression Ring Having Butt Seal, and Method

#14
20240376981
2024-11-14

Split piston ring unit

#15
20240271587
2024-08-15

Internal combustion engine with means for condensation fluid removal

#16
20240263700
2024-08-08

Piston ring combination, and internal combustion engine

#17
20240263699
2024-08-08

Piston ring

#18
20240229933
2024-07-11

Piston ring with variable pressure relief

#19
20240209942
2024-06-27

SEAL ASSEMBLY WITH ANTI-ROTATION FEATURE

#20
20240141993
2024-05-02

Oil control ring

#21
20240110625
2024-04-04

Compression ring

#22
20240084894
2024-03-14

Side rail and oil control ring comprising same

#23
20240077137
2024-03-07

Combination Piston and Piston Ring for Reduction of Crevice Volume

#24
20240077031
2024-03-07

Piston Seal Ring

#25
20230358313
2023-11-09

Combination of piston rings, and combination structure of piston and piston rings

#26
20230323950
2023-10-12

Piston seal ring

#27
20230304580
2023-09-28

PISTON RING

#28
20230304579
2023-09-28

Piston ring

#29
20230272854
2023-08-31

Combination of piston rings, and combination structure of piston and piston rings

#30
20230160470
2023-05-25

SHAFT MOUNTING ASSEMBLY

#31
20230129966
2023-04-27

GAS ENERGIZED SEAL FOR GIFFORD-MCMAHON EXPANDER

#32
20230120454
2023-04-20

WEAR RING AND WEAR RING ARRANGEMENT

#33
20230082408
2023-03-16

Combination piston and piston ring for reducing crevice volume

#34
20220412459
2022-12-29

Oil control ring

#35
20220282620
2022-09-08

Engine with gas exchange through piston rod

#36
20220163032
2022-05-26

Scraper ring assembly

#37
20220163031
2022-05-26

Scraper ring

#38
20220145990
2022-05-12

Wire for piston ring, and manufacturing method of piston ring

#39
20220145989
2022-05-12

Piston ring for engine and machining method of piston ring

#40
20220107022
2022-04-07

Piston ring and piston ring/piston combination with improved wear properties

#41
20220099183
2022-03-31

PACKAGING RING WITH WEAR OPENING

#42
20220090558
2022-03-24

Combined oil ring

#43
20220049769
2022-02-17

Piston ring and piston with internal groove sealing

#44
20220034402
2022-02-03

COMPOSITE PUMP PACKING SEALING ELEMENTS

#45
20210381597
2021-12-09

Cylinder of an internal combustion engine

#46
20210285544
2021-09-16

Method for producing piston assembly and hydraulic fluid device

#47
20210270204
2021-09-02

Abnormal combustion protection in an engine and piston configuration for same

#48
20210180695
2021-06-17

Scraper ring for a three-part oil scraper ring and three-part oil scraper ring

#49
20210164568
2021-06-03

Piston ring combination

#50
20210156371
2021-05-27

Piston ring and compressor

#51
20210140542
2021-05-13

Piston seal with solid lubricant applicator

#52
20210108722
2021-04-15

Combination Piston and Piston Ring for Reducing Crevice Volume

#53
20210108593
2021-04-15

Piston

#54
20210062916
2021-03-04

Piston assembly for an internal combustion engine of a motor vehicle

#55
20210025494
2021-01-28

Piston for an internal combustion engine

#56
20200386218
2020-12-10

Oil wiper packing

#57
20200378336
2020-12-03

Steel piston with optimized design

#58
20200300361
2020-09-24

Piston for an internal combustion engine

#59
20200284354
2020-09-10

Sealing arrangement

#60
20200284344
2020-09-10

PISTON RING WITH INLAID DLC COATING AND METHOD OF MANUFACTURING

#61
20200284149
2020-09-10

Engine with work stroke and gas exchange through piston rod

#62
20200256277
2020-08-13

CAST IRON CYLINDER LINER, AND INTERNAL COMBUSTION ENGINE

#63
20200248808
2020-08-06

Side rail

#64
20200224317
2020-07-16

Piston ring with shot-peened running-in layer and method for the production thereof

#65
20200173554
2020-06-04

Hydraulic device comprising a segment having at least one through-hole configured to promote the rotation of said segment

#66
20200096103
2020-03-26

Flutter-suppression piston ring

#67
20200080638
2020-03-12

Method for producing piston ring with recess

#68
20200056480
2020-02-20

Engine with work stroke and gas exchange through piston rod

#69
20200024946
2020-01-23

Engine with work stroke and gas exchange through piston rod

#70
20190376467
2019-12-12

Piston ring

#71
20190368607
2019-12-05

PISTON RING AND METHOD FOR MANUFACTURING A PISTON RING

#72
20190360585
2019-11-28

Combination oil ring

#73
20190346043
2019-11-14

Piston ring having a stepped running surface

#74
20190264813
2019-08-29

Wiper seal system and method

#75
20190257424
2019-08-22

Piston ring for engine

#76
20190178380
2019-06-13

Two part oil control ring having oil pressure effect ridges

#77
20190113139
2019-04-18

Multiple-piece oil stripping piston ring with reduced friction

#78
20190101211
2019-04-04

SEALING DEVICE

#79
20190093767
2019-03-28

Piston Ring for Reduction of Crevice Volume

#80
20190049011
2019-02-14

Piston seal with solid lubricant applicator

#81
20190049010
2019-02-14

Piston ring

#82
20180355865
2018-12-13

Reciprocating piston

#83
20180320789
2018-11-08

Wear ring for die-casting piston, and die-casting piston incorporating same

#84
20180299011
2018-10-18

Pressure ring

#85
20180292007
2018-10-11

Piston ring

#86
20180283552
2018-10-04

Piston ring

#87
20180216734
2018-08-02

Compression piston ring

#88
20180209539
2018-07-26

Compression piston ring with profiled section

#89
20180195612
2018-07-12

Piston compression rings of copper-nickel-tin alloys

#90
20180187780
2018-07-05

Piston ring for combustion engine

#91
20180106150
2018-04-19

Engine with compression and momentum stroke

#92
20180094726
2018-04-05

Combined oil control ring

#93
20180080555
2018-03-22

Compression ring for pistons

#94
20180038483
2018-02-08

Side rail

#95
20180031127
2018-02-01

Side rail

#96
20180023703
2018-01-25

PISTON RING AND MANUFACTURING METHOD

#97
20180023702
2018-01-25

Oil ring

#98
20180017159
2018-01-18

Piston ring

#99
20180010692
2018-01-11

Seal ring and sealing structure

#100
20170369811
2017-12-28

LUBRICATING OIL COMPOSITION

#101
20170335965
2017-11-23

Method for producing piston ring with recess

#102
20170321803
2017-11-09

Reduced friction piston ring

#103
20170227126
2017-08-10

Combined oil ring

#104
20170175893
2017-06-22

Combination oil ring

#105
20170159820
2017-06-08

Pressure released wiper assembly

#106
20170159819
2017-06-08

PRESSURE RELEASED WIPER ASSEMBLY FOR A SEALING ARRANGEMENT

#107
20170130840
2017-05-11

Piston ring

#108
20170097091
2017-04-06

INVERTED PISTON CONFIGURATIONS FOR INTERNAL COMBUSTION ENGINES

#109
20170089461
2017-03-30

Piston ring comprising a groove in the circumferential direction

#110
20170016536
2017-01-19

Gapless piston ring for internal combustion engine

#111
20170016360
2017-01-19

Timed gas exchange in engine using piston as exhaust valve

#112
20170016331
2017-01-19

Piston assembly for internal combustion engine

#113
20170016330
2017-01-19

Engine with piston that overshoots cylinder wall exhaust port

#114
20170016328
2017-01-19

Gas exchange through engine piston rod

#115
20170009887
2017-01-12

Piston ring configured to reduce friction

#116
20160369894
2016-12-22

Piston ring sealing for pneumatic actuator

#117
20160243309
2016-08-25

Syringe systems, piston seal systems, stopper systems, and methods of use and assembly

#118
20160235919
2016-08-18

Prefilled syringe, gasket for use in prefilled syringe, and gasket production method

#119
20160146347
2016-05-26

Seal set and sealing arrangement comprising at least one seal set

#120
20160146346
2016-05-26

Gasket insertion method for mounting gasket inside outer cylinder of syringe, and gasket for mounting

#121
20160131132
2016-05-12

Piston Seal and Pump Including Same

#122
20160123466
2016-05-05

PISTON RING

#123
20160076649
2016-03-17

Oil ring

#124
20160069456
2016-03-10

PISTON RING HAVING VARYING ATTRIBUTES

#125
20160025219
2016-01-28

Machining process for trapezoid rings with small axial dimensions, used in pistons of internal combustion engines

#126
20150354702
2015-12-10

Piston ring for internal combustion engines with increased fatigue strength, and method for producing same

#127
20150323073
2015-11-12

Reduced friction piston rings

#128
20150323072
2015-11-12

Actuator with screw-in gland and detent structure

#129
20150300492
2015-10-22

Piston ring with a periodically varying groove

#130
20150292620
2015-10-15

PISTON RING WITH VARYING APEX LINES

#131
20150267813
2015-09-24

Compression piston ring for an internal combustion engine

#132
20150251304
2015-09-10

Sealing device for a hydraulic percussion apparatus, and hydraulic percussion apparatus comprising such a sealing device

#133
20150225836
2015-08-13

Piston ring

#134
20150204204
2015-07-23

Sealing device

#135
20150198249
2015-07-16

Taper-faced compression ring and wire therefor

#136
20150130143
2015-05-14

Method for producing an oil scraper piston ring

#137
20150108720
2015-04-23

Sealing device and sealing structure

#138
20140346737
2014-11-27

Piston seal assembly

#139
20140265140
2014-09-18

DISSIMILAR RADIAL WALL OIL CONTROL RAILS

#140
20140197602
2014-07-17

Piston ring with localized nitrided coating

#141
20140076265
2014-03-20

Piston ring for two-stroke engines

#142
20130213222
2013-08-22

Piston ring for an internal combustion engine

#143
20130206096
2013-08-15

Piston and cooled piston ring therefor and method of construction thereof

#144
20130181410
2013-07-18

Internal combustion engine oil ring

#145
20130174726
2013-07-11

Piston ring with improved lubrication delivery

#146
20130049305
2013-02-28

INTERNAL COMBUSTION ENGINE OIL RING

#147
20130043659
2013-02-21

Piston ring

#148
20130032119
2013-02-07

Two-piece compression piston ring of an internal combustion engine

#149
20120304854
2012-12-06

Piston having position rings and support rings

#150
20120205876
2012-08-16

PISTON RING

#151
20120061920
2012-03-15

OIL RING MECHANISM OF A PISTON

#152
20110309586
2011-12-22

Compression piston ring

#153
20110290106
2011-12-01

Piston assembly

#154
20110266753
2011-11-03

SEALING SLEEVE

#155
20110260410
2011-10-27

Device and method for stabilizing a piston ring in a crosshead engine

#156
20110150635
2011-06-23

Seal and seal arrangement for confining leakage flows between adjacent components of turbo-machines and gas turbines

#157
20110135445
2011-06-09

Pressure balanced low-friction seal

#158
20110100318
2011-05-05

Oil ring and piston for an internal combustion engine

#159
20100176557
2010-07-15

Oil wiper ring

#160
20100162987
2010-07-01

Piston device for internal combustion engines

#161
20100090416
2010-04-15

Piston for internal combustion engines

#162
20100066031
2010-03-18

Piston ring

#163
20080277882
2008-11-13

Seal ring

#164
20080252902
2008-10-16

Method and device for detecting direction of member having outer periphery formed in vertically asymmetrical shape

#165
20080023919
2008-01-31

Seal ring

#166
20070272078
2007-11-29

Piston Device for Internal Combustion Engine

#167
20070125323
2007-06-07

Two-stroke internal combustion engine with oil ring

#168
20070022980
2007-02-01

Method for production of a coolable annular support for internally cooled piston rings

#169
20060266322
2006-11-30

Piston for an internal combustion engine

#170
20060255546
2006-11-16

Piston ring

#171
20060151959
2006-07-13

Sealing ring and sealing ring arrangement

#172
20060055120
2006-03-16

Seal ring

#173
20060038355
2006-02-23

Seal ring

#174
20060006604
2006-01-12

Oil ring

#175
20050109289
2005-05-26

High temperature and high pressure compressor piston ring

#176
20050028779
2005-02-10

Piston for an internal combustion engine

#177
17154660
2022-04-26

Piston ring seals