ClassID:

153246

F16L39/005 - CPC Classification

Classification description:

Joints or fittings for double-walled or multi-channel pipes or pipe assemblies for concentric pipes

Recent Application in this class:
#1
20260125890
2026-05-07

MULTI-FIT INLINE SURFACE DRAIN

#2
20250377059
2025-12-11

Jacketed Pipe Pump

#3
20250369544
2025-12-04

EXPANDABLE HOSE

#4
20250257837
2025-08-14

MALLEABLE PRESS FITTINGS

#5
20250161893
2025-05-22

CHEMICAL INJECTION SYSTEM FOR CONNECTION TO A CHEMICAL TANK AND A PROCESS LINE

#6
20250092976
2025-03-20

EXPANDABLE HOSE

#7
20250092975
2025-03-20

COUPLING DEVICE, AND METHOD FOR FLUSHING SAME

#8
20250075837
2025-03-06

Coupling for double-walled tubes

#9
20250052352
2025-02-13

HIGH STRENGTH INSULATED TUBE

#10
20250032957
2025-01-30

FRACTIONATOR ANNULAR DRAIN APPARATUS AND METHOD

#11
20250020257
2025-01-16

FLUID TRANSFER SYSTEM, SWIVEL JOINT DEVICE INCLUDING SUCH A SYSTEM, STACK OF SWIVEL JOINT DEVICES AND FLUID EXPLOITATION INSTALLATION

#12
20240410235
2024-12-12

MANUFACTURING METHODS FOR DUAL CONCENTRIC TUBING

#13
20240301976
2024-09-12

PIPE END FITTING WITH IMPROVED VENTING

#14
20240295281
2024-09-05

COUPLING FOR A DOUBLE-WALLED PIPE WITH LOW HEAT INGRESS

#15
20240271736
2024-08-15

Coupling for Multi-Walled Lines

#16
20240247476
2024-07-25

MULTI-FIT INLINE SURFACE DRAIN

#17
20240229994
2024-07-11

SWIVEL KNUCKLE CONNECTION

#18
20240216879
2024-07-04

Chemical injection system for connection to a chemical tank and a process line

#19
20240209977
2024-06-27

IMPROVED INSULATED COUPLING

#20
20240167606
2024-05-23

TESTABLE TERMINATION FITTING

#21
20240167596
2024-05-23

EXPANDABLE HOSE

#22
20240110671
2024-04-04

Boil-off shielded coupling for hydrogen tank filling

#23
20240093820
2024-03-21

Double containment fittings for connecting double containment tubing

#24
20240068613
2024-02-29

COUPLING FOR DOUBLE-WALLED HOSES

#25
20240059423
2024-02-22

FLUID TRANSPORT DEVICE AND METHOD FOR ASSEMBLING AND DISASSEMBLING A FLUID TRANSPORT DEVICE

#26
20240035606
2024-02-01

WATERWAY TRANSFERRING DEVICE AND WATER PURIFICATION FAUCET

#27
20240035605
2024-02-01

Double walled fuel line coupling components and assemblies capable of multiple degrees of displacement

#28
20240003476
2024-01-04

HYDROGEN PIPE COUPLING ARRANGEMENT WITH ENHANCED INNER SEALING

#29
20240003475
2024-01-04

IMPROVEMENTS RELATING TO PIPE-IN-PIPE PIPELINES

#30
20230375120
2023-11-23

PIPE-IN-PIPE OUTER PIPELINE SEALING SYSTEMS AND METHODS

#31
20230313926
2023-10-05

Swivel knuckle connection

#32
20230235842
2023-07-27

Device for connection of two double-wall pipes and hydrogen line including said connection device

#33
20230228363
2023-07-20

COUPLING FOR INSULATED PIPING

#34
20230175624
2023-06-08

Double Pipe System

#35
20230175622
2023-06-08

Expandable hose

#36
20230173439
2023-06-08

Chemical injection system for connection to a chemical tank and a process line

#37
20230114788
2023-04-13

Fractionator annular drain apparatus and method

#38
20230105113
2023-04-06

Testable termination fitting

#39
20230102097
2023-03-30

Double-wall hydrogen pipeline comprising at least one system for detecting a leak at at least one coupling system, and aircraft comprising at least one such pipeline

#40
20230092767
2023-03-23

Method and apparatus for multidirectional pipe runners

#41
20230064563
2023-03-02

Water line junction device

#42
20230061814
2023-03-02

Fluid pipe connection

#43
20230022292
2023-01-26

Spooling and Installing Trace-Heated Pipelines of Pipe-in-Pipe Configuration

#44
20230011161
2023-01-12

Mitigation of Buckling in Subsea Pipe-in-Pipe Systems

#45
20220403968
2022-12-22

Pipe joint

#46
20220373119
2022-11-24

Coupling for vacuum-insulated piping

#47
20220307638
2022-09-29

TWO FLOW, SUBSEA, HYDROCARBON FLUID FLOW PATH CONNECTING CONCENTRIC HUB AND USE OF SUCH A HUB

#48
20220252197
2022-08-11

Fluid flow connector

#49
20220221089
2022-07-14

Ferrule coupling for joining ducts together

#50
20220162916
2022-05-26

Manufacturing methods for dual concentric tubing

#51
20220090709
2022-03-24

DUAL-WALLED FLUID TRANSPORTATION SYSTEMS AND RELATED METHODS

#52
20220047968
2022-02-17

Fractionator annular drain apparatus and method

#53
20220047901
2022-02-17

Magnetic quick connect

#54
20210404588
2021-12-30

Coaxial tubing systems with securable spacers

#55
20210404584
2021-12-30

Expandable hose

#56
20210388933
2021-12-16

Malleable press fittings

#57
20210372113
2021-12-02

Multi-fit inline surface drain

#58
20210364105
2021-11-25

Seal on the interstice of double-walled fiberglass pipe

#59
20210308639
2021-10-07

Chemical injection system for connection to a chemical tank and a process line

#60
20210293362
2021-09-23

Pipe end fitting with improved venting

#61
20210285575
2021-09-16

DOUBLE PIPE

#62
20210270405
2021-09-02

Conduits for transporting fluids and methods of fabricating the same

#63
20210254771
2021-08-19

Johnston coupling with galvanic separation

#64
20210231247
2021-07-29

Attachment device for a hose arrangement

#65
20210207759
2021-07-08

Quick-release Johnston coupling

#66
20210172684
2021-06-10

Internal heat exchanger and refrigeration cycle apparatus having the internal heat exchanger

#67
20210156502
2021-05-27

Malleable press fittings

#68
20210140397
2021-05-13

Fuel tube protector for vehicle

#69
20210116056
2021-04-22

Crimp fittings and systems, kits, and methods incorporating the same

#70
20210114314
2021-04-22

Induction connection sleeve

#71
20210107672
2021-04-15

Dual walled tube flexible joint seal systems and methods

#72
20210102652
2021-04-08

DOUBLE PIPE

#73
20210054952
2021-02-25

Method for assembling pipe-in-pipe pipeline elements for transporting fluids

#74
20200393072
2020-12-17

Flexible double walled hose connection

#75
20200370749
2020-11-26

Cross compatible adapter for chimney sections with different outer diameters

#76
20200300389
2020-09-24

FLUID COUPLINGS AND METHODS FOR ADDITIVE MANUFACTURING THEREOF

#77
20200240309
2020-07-30

Connector

#78
20200200318
2020-06-25

Conduits for transporting fluids

#79
20200191306
2020-06-18

Swivel knuckle connection

#80
20200149671
2020-05-14

Middle threaded fitting

#81
20200018432
2020-01-16

Swivel knuckle connection

#82
20200018429
2020-01-16

IN-LINE CONNECTOR LOCKING SYSTEM

#83
20200011454
2020-01-09

Tube structure with a protected sensor and method for manufacturing a tube structure with a protected sensor

#84
20190368644
2019-12-05

Non-terminating double containment fitting

#85
20190353291
2019-11-21

Couplings

#86
20190316719
2019-10-17

Apparatus for connecting wellsite tubing

#87
20190309886
2019-10-10

Device for connecting pipe ends of double-walled pipes

#88
20190309885
2019-10-10

Flexible double walled hose connection

#89
20190271144
2019-09-05

Assemblable structural column joint connection using fiber-reinforced concrete filled round double steel tubes and mounting method thereof

#90
20190242500
2019-08-08

Double skinned pipe assembly

#91
20190195408
2019-06-27

Malleable press fittings

#92
20190195399
2019-06-27

Dual containment fitting and dual containment fitting assembly

#93
20190170032
2019-06-06

Arrangement for removing blow-by gases from a crankcase of an internal combustion engine

#94
20190145564
2019-05-16

Pipe end fitting with improved venting

#95
20190145563
2019-05-16

Pipe end fitting with improved venting

#96
20190072221
2019-03-07

Pipe-in-pipe pipelines

#97
20190063658
2019-02-28

Line coupling and container having the same

#98
20190063047
2019-02-28

WATER PIPE STRUCTURE OF BASIN FAUCET

#99
20190049051
2019-02-14

Pipe connecting joint

#100
20180372255
2018-12-27

Middle threaded fitting

#101
20180356021
2018-12-13

Cross-over fluid coupling

#102
20180311595
2018-11-01

Dual channel connector units, devices, methods, and systems including the same

#103
20180306356
2018-10-25

WELDLESS TRANSFER TUBE ASSEMBLY

#104
20180224043
2018-08-09

Threaded fitting for tube

#105
20180224042
2018-08-09

Tube fitting

#106
20180223734
2018-08-09

Fitting for multiwall tube

#107
20180209314
2018-07-26

Exhaust conduits for marine engine exhaust systems

#108
20180193677
2018-07-12

Gas delivery system

#109
20180087700
2018-03-29

Double wall duct connector

#110
20180087696
2018-03-29

Fluid couplings and methods for additive manufacturing thereof

#111
20180079145
2018-03-22

INDUCTION CONNECTION SLEEVE

#112
20180066781
2018-03-08

Triple-weld fitting

#113
20170370513
2017-12-28

Dual duct flexible coupling apparatus and methods of use

#114
20170336007
2017-11-23

Shrouded pipe

#115
20170335997
2017-11-23

Shrouded pipe

#116
20170314696
2017-11-02

Shrouded valve assembly

#117
20170299177
2017-10-19

Exhaust tube holding member and exhaust structure for combustion

#118
20170299101
2017-10-19

Swivel knuckle connection

#119
20170296200
2017-10-19

Swivel knuckle connection

#120
20170254445
2017-09-07

Double skinned pipe assembly

#121
20170198639
2017-07-13

Double walled tube drainage system

#122
20170159871
2017-06-08

Support element, corresponding cryogenic fluid circuit and corresponding method

#123
20170122473
2017-05-04

Non-terminating double containment fitting

#124
20170067582
2017-03-09

Method of manufacturing a pipe segment

#125
20170059074
2017-03-02

PIPE-IN-PIPE QUICK CONNECTION STRUCTURE

#126
20170016565
2017-01-19

PIP trace heating connection assembly

#127
20160281896
2016-09-29

Double wall tube fitting with an integrated diagnostic port

#128
20160230910
2016-08-11

Thermally compliant fitting for high temperature tube applications

#129
20160123512
2016-05-05

Method of installing fuel lines in an aircraft

#130
20160116095
2016-04-28

Line connector and line set for fluid media

#131
20160109053
2016-04-21

Pipe section

#132
20160090718
2016-03-31

Inlet water pipe

#133
20160076680
2016-03-17

Weldless transfer tube assembly

#134
20160053645
2016-02-25

Engine device

#135
20150369413
2015-12-24

Double wall tube bolted flange fitting

#136
20150369400
2015-12-24

Double wall tube assemblies

#137
20150338010
2015-11-26

Thermally insulated and heated double-walled pipe segment for fitting by screw fastening, and a method of implementing such a pipe segment

#138
20150323107
2015-11-12

Fluid couplings and methods for additive manufacturing thereof

#139
20150316190
2015-11-05

Manifold assembly for dual-walled pipe

#140
20150316186
2015-11-05

Assembly for coupling a pair of double-walled tubes

#141
20150308425
2015-10-29

Power air compressor

#142
20150285421
2015-10-08

DOUBLE-WALLED FUEL SUPPLY LINE ELEMENT AND CONNECTING FLANGE FOR THE SAME

#143
20150219048
2015-08-06

Assembly device for double-skinned aircraft fuel pipes

#144
20150184781
2015-07-02

Threaded connection for double-walled pipes

#145
20150175468
2015-06-25

Mold assembly with concentric tubes for leakproof supply of fluid and vacuum

#146
20150130183
2015-05-14

DOUBLE WALL TUBE ADAPTER AND JOINT

#147
20150123394
2015-05-07

Dielectric isolators

#148
20150096631
2015-04-09

METHODS AND SYSTEMS FOR CHANNELING AIRCRAFT HYDRAULIC FLUID

#149
20150061281
2015-03-05

Axially expansible pipe assembly

#150
20150059862
2015-03-05

Closure fitting for containment piping

#151
20140375049
2014-12-25

Connections for subsea pipe-in-pipe structures

#152
20140367959
2014-12-18

T-piece preformer

#153
20140332107
2014-11-13

Line and delivery system having such a line

#154
20140241810
2014-08-28

Connector arrangement for a subsea pipeline

#155
20140117162
2014-05-01

Connector for securing double skin pipework and assembly obtained

#156
20140116561
2014-05-01

Gas distribution assembly

#157
20140116556
2014-05-01

Pipe-in-pipe apparatus including an engineered pipe

#158
20140020908
2014-01-23

RF antenna assembly including dual-wall conductor and related methods

#159
20140020842
2014-01-23

Fusion welding socket

#160
20140014205
2014-01-16

Valve having concentric fluid paths

#161
20130320666
2013-12-05

LOCKING DEVICE FOR PIPE MEMBER

#162
20130291988
2013-11-07

Pipe end fitting with improved venting

#163
20130277962
2013-10-24

Duct fittings

#164
20130264918
2013-10-10

Housing and method of making same

#165
20130207383
2013-08-15

Containment Pipe Fittings and Methods

#166
20130181441
2013-07-18

Anti-buckling coupling device for piping

#167
20130181439
2013-07-18

Seal assembly for nested dual drill pipe

#168
20130153046
2013-06-20

Electrostatic discharge protected ferrule

#169
20130099476
2013-04-25

Connecting System for a Pipe with Two Lumina

#170
20130049355
2013-02-28

Apparatus for connecting double jacketed pipes (two-part pipe coupling part)

#171
20130000747
2013-01-03

Double-skin nozzle system, junction system between two tube portions, and aircraft provided with such a system

#172
20120248761
2012-10-04

Containment pipe fittings and methods

#173
20120217739
2012-08-30

APPARATUS FOR CONNECTING DOUBLE JACKETED PIPES

#174
20120192985
2012-08-02

Assembly of coaxial pipes including junction parts with sealed inner cavities, and method for making same

#175
20120104172
2012-05-03

Fuel line in an aircraft

#176
20120056418
2012-03-08

Couplings

#177
20120049509
2012-03-01

SECONDARY CONTAINED CSST PIPE AND FITTING ASSEMBLY

#178
20110241333
2011-10-06

Line connector and line set for fluid media

#179
20110233923
2011-09-29

Connected structure of vacuum double pipe, vacuum double pipe, and joint of vacuum double pipe

#180
20110229271
2011-09-22

Venting gas

#181
20110186169
2011-08-04

Coaxial pipe assembly including a thermally insulating sleeve

#182
20110154886
2011-06-30

Flange fitting with leak sensor port

#183
20110127045
2011-06-02

Method of sealing annular space between inner and outer upright tubes

#184
20110120576
2011-05-26

Fluid transfer device having leak indication and method of making same

#185
20110101676
2011-05-05

Pipe stalk and method of assembling a pipeline therefrom

#186
20110041934
2011-02-24

Delivery Pipline System

#187
20100301602
2010-12-02

Interfitting tubular members

#188
20100282353
2010-11-11

Coaxial Pipe Element In Which The Inner Pipe Is Under Strees, And A Method Of Fabrication

#189
20100276026
2010-11-04

HOSE-IN-HOSE TERMINATION FITTING

#190
20100270788
2010-10-28

Connecting structure of a double tube

#191
20100123306
2010-05-20

Method And Devices For Connecting Jacketed Pipeline

#192
20100066079
2010-03-18

Safety coupling

#193
20100018599
2010-01-28

Double wall duct system

#194
20100013213
2010-01-21

Structure for connection between integrated panel and fluid device

#195
20100001512
2010-01-07

Dielectric isolators

#196
20090284004
2009-11-19

DOUBLE CONTAINMENT SYSTEM, FITTINGS FOR FLUID FLOW COMPONENTS AND ASSOCIATED METHODS

#197
20090261583
2009-10-22

Fittings with redundant seals for aircraft fuel lines, fuel tanks, and other systems

#198
20090261578
2009-10-22

Plug-in coupling for cryogenic lines

#199
20090256352
2009-10-15

Aircraft fuel pipe coupling

#200
20090236849
2009-09-24

Double pipe containment structure

#201
20090211654
2009-08-27

Assembly For The Differential Delivery Of Treated And Mains Water

#202
20090194945
2009-08-06

Energized composite metal to metal seal

#203
20090145506
2009-06-11

Cryogenic transfer hose

#204
20090127848
2009-05-21

Flange fitting with leak sensor port

#205
20090123221
2009-05-14

System for quick disconnect termination or connection for cryogenic transfer lines with simultaneous electrical connection

#206
20090102187
2009-04-23

Conduit with joint covered by a boot

#207
20090096208
2009-04-16

Thermal insulation device of a screwed junction

#208
20090091126
2009-04-09

SHROUDED COUPLING ASSEMBLIES FOR CONDUITS

#209
20090025815
2009-01-29

Pipeline and Method for Manufacturing That Pipeline

#210
20080315578
2008-12-25

Junction part for coaxial pipe elements, and a method of joining together coaxial pipe elements

#211
20080169037
2008-07-17

Cryogenic bayonet connection

#212
20080149210
2008-06-26

Light and reinforced undersea coaxial pipe element

#213
20070256682
2007-11-08

Gasket-less vent pipe coupling

#214
20070200031
2007-08-30

Spacer for coaxially sheathed fuel pipes

#215
20070193729
2007-08-23

Outlet fitting for double pipe quench exchanger

#216
20070145691
2007-06-28

Fluid gasket

#217
20070051406
2007-03-08

Shrouded valve apparatus and related methods

#218
20060284018
2006-12-21

Valves for annular conduits including aircraft fuel conduits and associated systems and methods

#219
20060278760
2006-12-14

Fittings with redundant seals for aircraft fuel lines, fuel tanks, and other systems

#220
20060061102
2006-03-23

Jacketed pipe flange

#221
20060038401
2006-02-23

Coupling for cryogenic media

#222
20050257833
2005-11-24

Contained pipeline system with brine filled interstitial space and method for detecting leakage in same

#223
20050224127
2005-10-13

Compound pipe

#224
20050212285
2005-09-29

Dual-walled piping system and methods

#225
20050161533
2005-07-28

Delivery system for treated water, showerhead and supply pipe for said system

#226
20050120534
2005-06-09

Shrouded fluid-conducting apparatus

#227
20050116466
2005-06-02

Flat-surface quick coupling tubes extending between a pressurized fluid user device and a fluid feeding means

#228
20050052024
2005-03-10

Coupling means for multi-wall pipes or tubes

#229
20050028877
2005-02-10

Joint-type coaxial connection

#230
18408948
2025-04-29

Dual containment pipe assembly

#231
16850487
2021-11-09

Method and apparatus for multidirectional pipe runners

#232
15946497
2020-04-28

Method and apparatus for multidirectional pipe runners

#233
15498954
2018-05-08

Dual channel connector units, devices, methods, and systems including the same

#234
14607791
2018-05-29

Doubled wall pipe flange and coupling configuration

#235
13416306
2015-09-22

Intake manifold assembly for storage tanks