Patents-Review.com
ClassID:

138883 ⎘

F02B71/04 - CPC Classification

Classification description:

Free-piston engines; Engines without rotary main shaft Adaptations of such engines for special use; Combinations of such engines with apparatus driven thereby

Sub-classes:
Recent Application in this class:
#1
20260066758
2026-03-05

LINEAR ELECTROMAGNETIC MACHINE SYSTEM

 #2
20250167632
2025-05-22

INTEGRATED LINEAR GENERATOR SYSTEM

 #3
20250030317
2025-01-23

INTEGRATED LINEAR GENERATOR SYSTEM

 #4
20240287930
2024-08-29

HIGH-EFFICIENCY LINEAR GENERATOR

 #5
20240240586
2024-07-18

ENERGY STORAGE AND CONVERSION IN LINEAR GENERATORS

 #6
20240173834
2024-05-30

FASTENER-DRIVING TOOL WITH MULTIPLE COMBUSTION CHAMBERS AND USABLE WITH FUEL CANISTERS OF VARYING LENGTHS

 #7
20240125281
2024-04-18

Control of piston trajectory in a linear generator

 #8
20240055946
2024-02-15

Integrated linear generator system

 #9
20230296062
2023-09-21

SYSTEM AND METHOD FOR CONTROLLING ENGINE

 #10
20230256579
2023-08-17

Fastener-driving tool with one or more combustion chambers and an exhaust gas recirculation system

 #11
20230246576
2023-08-03

Auto-braking for an electromagnetic machine

 #12
20230198367
2023-06-22

LINEAR ELECTROMAGNETIC MACHINE SYSTEM

 #13
20230193817
2023-06-22

Energy storage and conversion in linear generators

 #14
20230101969
2023-03-30

High-efficiency linear generator

 #15
20230058375
2023-02-23

Linear combustion engines with valve in piston

 #16
20220399784
2022-12-15

Integrated linear generator system

 #17
20220381192
2022-12-01

Control of piston trajectory in a linear generator

 #18
20220364502
2022-11-17

Energy storage and conversion in linear generators

 #19
20220282620
2022-09-08

Engine with gas exchange through piston rod

 #20
20220173682
2022-06-02

Auto-braking for an electromagnetic machine

 #21
20220162985
2022-05-26

Vibratory plate and its engine

 #22
20220154634
2022-05-19

Opposing piston synchronized linear engine-alternator (OPSLEA) for electrical power generation

 #23
20220127999
2022-04-28

Adaptive linear linked piston electric power generator

 #24
20220120214
2022-04-21

Six-cylinder opposed free piston internal combustion engine generator

 #25
20220072692
2022-03-10

Fastener-driving tool with multiple combustion chambers and usable with fuel canisters of varying lengths

 #26
20220049646
2022-02-17

Adaptive linear linked piston electric power generator

 #27
20220049645
2022-02-17

Adaptive linear linked piston electric power generator

 #28
20210332746
2021-10-28

Converter for converting reciprocating motion into rotary motion, and motor, generator unit, and vehicle

 #29
20210324812
2021-10-21

Control of piston trajectory in a linear generator

 #30
20210288570
2021-09-16

Linear electromagnetic machine system

 #31
20210114192
2021-04-22

Fastener-driving tool with one or more combustion chambers and an exhaust gas recirculation system

 #32
20210079838
2021-03-18

High-efficiency linear generator

 #33
20210017919
2021-01-21

System and method for controlling engine

 #34
20210010437
2021-01-14

Control of piston trajectory in a linear generator

 #35
20200408159
2020-12-31

System and method for controlling engine using reference point

 #36
20200400064
2020-12-24

Energy storage and conversion in linear generators

 #37
20200386152
2020-12-10

Adaptive linear linked piston electric power generator

 #38
20200328707
2020-10-15

Auto-braking for an electromagnetic machine

 #39
20200284149
2020-09-10

Engine with work stroke and gas exchange through piston rod

 #40
20200227976
2020-07-16

DC-DC converter in a non-steady system

 #41
20200217245
2020-07-09

ENGINE

 #42
20200195093
2020-06-18

Integrated linear generator system

 #43
20200056480
2020-02-20

Engine with work stroke and gas exchange through piston rod

 #44
20200036273
2020-01-30

Linear electromagnetic machine system with bearing housings having pressurized gas

 #45
20200024946
2020-01-23

Engine with work stroke and gas exchange through piston rod

 #46
20190390623
2019-12-26

Control of piston trajectory in a free-piston combustion engine

 #47
20190356200
2019-11-21

Linear electrical machine

 #48
20190345871
2019-11-14

Free-piston linear apparatus

 #49
20190178157
2019-06-13

High-efficiency linear combustion engine

 #50
20190168367
2019-06-06

Fastener-driving tool with multiple combustion chambers and usable with fuel canisters of varying lengths

 #51
20190153936
2019-05-23

Free-piston engine

 #52
20190149074
2019-05-16

Auto-braking for an electromagnetic machine

 #53
20190136757
2019-05-09

Energy storage and conversion in free-piston combustion engines

 #54
20190123668
2019-04-25

Auto-braking for an electromagnetic machine

 #55
20190089225
2019-03-21

DC-DC converter in a non-steady system

 #56
20190085696
2019-03-21

Free-piston device and method for operating a free-piston device

 #57
20190085695
2019-03-21

Free piston device and method for operating a free piston device

 #58
20190085694
2019-03-21

Free piston device

 #59
20190085693
2019-03-21

Free piston apparatus

 #60
20190063357
2019-02-28

Control of piston trajectory in a free-piston combustion engine

 #61
20190055898
2019-02-21

Free piston engine power plant

 #62
20190039220
2019-02-07

Fastener-driving tool with one or more combustion chambers and an exhaust gas recirculation system

 #63
20180298814
2018-10-18

High-efficiency linear combustion engine

 #64
20180106150
2018-04-19

Engine with compression and momentum stroke

 #65
20170350339
2017-12-07

Control of piston trajectory in a free-piston combustion engine

 #66
20170306837
2017-10-26

Energy storage and conversion in free-piston combustion engines

 #67
20170241331
2017-08-24

High-efficiency linear combustion engine

 #68
20170058701
2017-03-02

Parallel motion heat energy power machine and working method thereof

 #69
20170016536
2017-01-19

Gapless piston ring for internal combustion engine

 #70
20170016360
2017-01-19

Timed gas exchange in engine using piston as exhaust valve

 #71
20170016331
2017-01-19

Piston assembly for internal combustion engine

 #72
20170016330
2017-01-19

Engine with piston that overshoots cylinder wall exhaust port

 #73
20170016328
2017-01-19

Gas exchange through engine piston rod

 #74
20160376982
2016-12-29

Highly Efficient Two-Stroke Internal Combustion Hydraulic Engine with a Torquing Vane Device Incorporated

 #75
20160326953
2016-11-10

Potential energy storage engine

 #76
20160305317
2016-10-20

Engine

 #77
20160215689
2016-07-28

System And Method For Electrically-Coupled Heat Engine And Thermal Cycle

 #78
20160208686
2016-07-21

Energy storage and conversion in free-piston combustion engines

 #79
20160146153
2016-05-26

Secure control system for multistage thermo acoustic micro-CHP generator

 #80
20160090908
2016-03-31

High-efficiency linear combustion engine

 #81
20160069256
2016-03-10

HYDRAULIC ENGINE

 #82
20150343625
2015-12-03

ELECTROPNEUMATIC GAS FASTENING DEVICE

 #83
20150307796
2015-10-29

System and method for electrically-coupled heat engine and thermal cycle

 #84
20150107547
2015-04-23

Internal combustion engine and a method of operating an internal combustion engine

 #85
20150001852
2015-01-01

Linear electrical machine/generator with segmented stator for free piston engine generator

 #86
20140283791
2014-09-25

Free-piston engine

 #87
20140216411
2014-08-07

Linear alternator assembly with four-stroke working cycle and vehicle having same

 #88
20140209067
2014-07-31

System and method for electrically-coupled heat engine and thermal cycle

 #89
20140174396
2014-06-26

Piston

 #90
20140083077
2014-03-27

Environmentally sealed combustion powered linear actuator

 #91
20130298874
2013-11-14

Methods and systems for free piston engine control

 #92
20130167798
2013-07-04

Methods and systems for managing a clearance gap in a piston engine

 #93
20130167796
2013-07-04

Methods and systems for managing a clearance gap in a piston engine

 #94
20130106116
2013-05-02

Thermomagnetic generator

 #95
20120280513
2012-11-08

Free piston engine

 #96
20120266842
2012-10-25

Combustion Management System

 #97
20120255434
2012-10-11

Piston

 #98
20120235517
2012-09-20

High-efficiency linear combustion engine

 #99
20120204836
2012-08-16

Linear free piston combustion engine with indirect work extraction via gas linkage

 #100
20120160189
2012-06-28

Electromagnetic engine

 #101
20120152183
2012-06-21

Hydraulic Engine

 #102
20120125291
2012-05-24

High-efficiency linear combustion engine

 #103
20120125288
2012-05-24

High-efficiency linear combustion engine

 #104
20120112469
2012-05-10

Turbocompound free piston linear alternator

 #105
20120112468
2012-05-10

Opposed free piston linear alternator

 #106
20110278857
2011-11-17

Method and apparatus for harvesting energy from ankle motion

 #107
20110221208
2011-09-15

Opposed piston electromagnetic engine

 #108
20110203548
2011-08-25

Plunger Motor

 #109
20110174271
2011-07-21

System and method for electrically-coupled heat engine and thermal cycle

 #110
20110073631
2011-03-31

Combustion powered driver

 #111
20110067216
2011-03-24

Method of retrofitting an engine

 #112
20110030548
2011-02-10

Energy conversion devices and systems including the same

 #113
20100277012
2010-11-04

Linear generator having a fluid pressure cylinder structure

 #114
20100176591
2010-07-15

RECIPROCATING PISTON MACHINE WITH OSCILLATING BALANCING ROTORS

 #115
20100127507
2010-05-27

Electromagnetic engine

 #116
20100108735
2010-05-06

Gas internal combustion type nailing machine

 #117
20100107604
2010-05-06

AMMONIA GENERATOR, VEHICLE AND METHOD FOR GENERATING AMMONIA

 #118
20090320799
2009-12-31

Drive system with a rotary energy-transmission element

 #119
20090308345
2009-12-17

Energy Converter Having Pistons with Internal Gas Passages

 #120
20090271088
2009-10-29

Hydraulic engine

 #121
20090250035
2009-10-08

Hydraulic powertrain system

 #122
20090199821
2009-08-13

Method to convert free-piston linear motion to rotary motion

 #123
20090179424
2009-07-16

INTERNAL COMBUSTION ENGINE DRIVEN TURBO-GENERATOR FOR HYBRID VEHICLES AND POWER GENERATION

 #124
20090094827
2009-04-16

Method of retrofitting an engine

 #125
20090091138
2009-04-09

Electromagnetic engine

 #126
20090090334
2009-04-09

Opposed piston electromagnetic engine

 #127
20080271711
2008-11-06

Four-Stroke Free Piston Engine

 #128
20080251050
2008-10-16

Rapid-fire rapid-response power conversion system

 #129
20080224476
2008-09-18

Portable power pack, fuel/air supply for the portable power pack, uniflow scavenging micro-engine for the portable power pack and operation method thereof

 #130
20080169326
2008-07-17

Venting check valve for combustion nailer

 #131
20080115767
2008-05-22

Combustion-powered linear air motor/compressor

 #132
20080036312
2008-02-14

Energy converter

 #133
20070209615
2007-09-13

Monocylindrical hybrid two-cycle engine, compressor and pump, and method of operation

 #134
20070158947
2007-07-12

System and method for controlling a power generating system

 #135
20070158946
2007-07-12

Power generating system

 #136
20070079777
2007-04-12

Powered devices

 #137
20060213466
2006-09-28

Internal combustion engine

 #138
20060201456
2006-09-14

Internal combustion engine

 #139
20060196455
2006-09-07

Linear fluid engine

 #140
20060196454
2006-09-07

Linear fluid engine

 #141
20060191501
2006-08-31

Flywheel vane combustion engine

 #142
20060156719
2006-07-20

Electrical power generating system

 #143
20060144889
2006-07-06

Combustion-type power tool with exhaust gas flow regulating rib

 #144
20060144041
2006-07-06

Dynamic mass transfer rapid response power conversion system

 #145
20060124083
2006-06-15

Control device for free piston engine and method for the same

 #146
20060042575
2006-03-02

Hydraulic synchronizing coupler for a free piston engine

 #147
20060021589
2006-02-02

Valve system for a rapid response power conversion device

 #148
20050284427
2005-12-29

Free piston compressor

 #149
20050115243
2005-06-02

Flywheel vane combustion engine

 #150
20050109295
2005-05-26

Free piston engine and power generation system therewith

 #151
20050103305
2005-05-19

Internal combustion engine

 #152
20050103287
2005-05-19

Internal combustion engine

 #153
20050081804
2005-04-21

Free-piston device with electric linear drive

 #154
20050072150
2005-04-07

Flywheel combustion engine

 #155
15087990
2017-05-23

Control of piston trajectory in a free-piston combustion engine

 #156
13760802
2015-06-23

Free piston engine using exhaust gas for providing increased thrust to an aircraft turbine engine