Patents-Review.com
ClassID:

138881 ⎘

F02B71/00 - CPC Classification

Classification description:

Free-piston engines; Engines without rotary main shaft

Sub-classes:
Recent Application in this class:
#1
20260043344
2026-02-12

FREE PISTON ENGINE

 #2
20240287930
2024-08-29

HIGH-EFFICIENCY LINEAR GENERATOR

 #3
20240240586
2024-07-18

ENERGY STORAGE AND CONVERSION IN LINEAR GENERATORS

 #4
20240125281
2024-04-18

Control of piston trajectory in a linear generator

 #5
20230193817
2023-06-22

Energy storage and conversion in linear generators

 #6
20230101969
2023-03-30

High-efficiency linear generator

 #7
20220381192
2022-12-01

Control of piston trajectory in a linear generator

 #8
20220364502
2022-11-17

Energy storage and conversion in linear generators

 #9
20220282620
2022-09-08

Engine with gas exchange through piston rod

 #10
20220260034
2022-08-18

Open-faced piston assembly

 #11
20220260011
2022-08-18

Single air supply using hollow piston rod

 #12
20220123627
2022-04-21

Free piston generator based on rigid synchronous transmission system

 #13
20210324812
2021-10-21

Control of piston trajectory in a linear generator

 #14
20210189954
2021-06-24

Piston rod and free piston engine

 #15
20210180509
2021-06-17

Internal combustion engine with split cylinder and free piston and power generation using the same

 #16
20210079838
2021-03-18

High-efficiency linear generator

 #17
20210010437
2021-01-14

Control of piston trajectory in a linear generator

 #18
20200400064
2020-12-24

Energy storage and conversion in linear generators

 #19
20200284149
2020-09-10

Engine with work stroke and gas exchange through piston rod

 #20
20200271071
2020-08-27

Open-faced piston assembly

 #21
20200224585
2020-07-16

Piston rod and free piston engine

 #22
20200056480
2020-02-20

Engine with work stroke and gas exchange through piston rod

 #23
20200024946
2020-01-23

Engine with work stroke and gas exchange through piston rod

 #24
20190390623
2019-12-26

Control of piston trajectory in a free-piston combustion engine

 #25
20190316543
2019-10-17

Open-faced piston assembly

 #26
20190178157
2019-06-13

High-efficiency linear combustion engine

 #27
20190136757
2019-05-09

Energy storage and conversion in free-piston combustion engines

 #28
20190085696
2019-03-21

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

 #29
20190085695
2019-03-21

Free piston device and method for operating a free piston device

 #30
20190085694
2019-03-21

Free piston device

 #31
20190085693
2019-03-21

Free piston apparatus

 #32
20190063357
2019-02-28

Control of piston trajectory in a free-piston combustion engine

 #33
20190055898
2019-02-21

Free piston engine power plant

 #34
20190032556
2019-01-31

Turbocharged dual-fuel engine

 #35
20180298814
2018-10-18

High-efficiency linear combustion engine

 #36
20180258845
2018-09-13

Homogeneous charge compression ignition linear generator

 #37
20180207778
2018-07-26

Fuel system for a combustion driven fastener hand tool

 #38
20180106215
2018-04-19

Open-faced piston assembly

 #39
20180106150
2018-04-19

Engine with compression and momentum stroke

 #40
20170350339
2017-12-07

Control of piston trajectory in a free-piston combustion engine

 #41
20170306837
2017-10-26

Energy storage and conversion in free-piston combustion engines

 #42
20170241331
2017-08-24

High-efficiency linear combustion engine

 #43
20170044975
2017-02-16

Free piston engine

 #44
20170016536
2017-01-19

Gapless piston ring for internal combustion engine

 #45
20170016393
2017-01-19

Engine with compression and momentum stroke

 #46
20170016360
2017-01-19

Timed gas exchange in engine using piston as exhaust valve

 #47
20170016331
2017-01-19

Piston assembly for internal combustion engine

 #48
20170016330
2017-01-19

Engine with piston that overshoots cylinder wall exhaust port

 #49
20170016328
2017-01-19

Gas exchange through engine piston rod

 #50
20170016327
2017-01-19

Engine with continuous gas exchange during momentum stroke

 #51
20160326953
2016-11-10

Potential energy storage engine

 #52
20160208686
2016-07-21

Energy storage and conversion in free-piston combustion engines

 #53
20160090908
2016-03-31

High-efficiency linear combustion engine

 #54
20160059399
2016-03-03

Combustion driven fastener hand tool

 #55
20160032820
2016-02-04

Systems and methods for transient control of a free-piston engine

 #56
20150122227
2015-05-07

Combustion chamber construction with dual mixing regions for opposed-piston engines

 #57
20140283791
2014-09-25

Free-piston engine

 #58
20140265348
2014-09-18

Instant entropy system

 #59
20140165967
2014-06-19

Internal combustion engines

 #60
20140130771
2014-05-15

HIGH-EFFICIENCY LINEAR COMBUSTION ENGINE

 #61
20140116389
2014-05-01

Single-cylinder, dual head internal combustion engine having magnetically coupled power delivery

 #62
20140083077
2014-03-27

Environmentally sealed combustion powered linear actuator

 #63
20130333659
2013-12-19

Internal combustion engine of the annular piston type and a center shaft for such an engine

 #64
20130298874
2013-11-14

Methods and systems for free piston engine control

 #65
20130247877
2013-09-26

Free-Piston Engine for Generating Combined Heat and Power

 #66
20130118453
2013-05-16

Free-piston internal combustion engine

 #67
20120235517
2012-09-20

High-efficiency linear combustion engine

 #68
20120160190
2012-06-28

Piston engine having magnetic piston bearing

 #69
20120125291
2012-05-24

High-efficiency linear combustion engine

 #70
20110316359
2011-12-29

BISTABLE LINEAR MOTOR

 #71
20110239642
2011-10-06

Two-stroke HCCI compound free-piston/gas-turbine engine

 #72
20110162598
2011-07-07

Mass driven motor with a middle signaling piston

 #73
20100283263
2010-11-11

Device for conversion of thermodynamic energy into electrical energy

 #74
20100011759
2010-01-21

DEVICE AND METHOD FOR CONVERTING ENERGY

 #75
20090320799
2009-12-31

Drive system with a rotary energy-transmission element

 #76
20090031991
2009-02-05

Method and system for controlling a free-piston energy converter

 #77
20080271711
2008-11-06

Four-Stroke Free Piston Engine

 #78
20070295201
2007-12-27

Control of Reciprocating Linear Machines

 #79
20070261677
2007-11-15

Paired-piston linear engine

 #80
20070079777
2007-04-12

Powered devices

 #81
20060196455
2006-09-07

Linear fluid engine

 #82
20060196454
2006-09-07

Linear fluid engine

 #83
20060185631
2006-08-24

Four-cylinder, four-cycle, free piston, premixed charge compression ignition, internal combustion reciprocating piston engine with a variable piston stroke

 #84
20060117783
2006-06-08

Heat pump system

 #85
20060101816
2006-05-18

Internal explosion engine and generator using non-combustible gases

 #86
20050263114
2005-12-01

Piston lubrication for a free piston engine

 #87
20050257759
2005-11-24

Two-stroke internal combustion engine with free opposed pistons

 #88
20050247271
2005-11-10

Electromagnetic servo valve strategy for controlling a free piston engine

 #89
20050223888
2005-10-13

Pneumatic actuator for precision servo type applications

 #90
20050145206
2005-07-07

Recycler for linear motor

 #91
20050120983
2005-06-09

Scavenging system for intermittent linear motor

 #92
16207479
2020-05-05

Piston rod and free piston engine

 #93
15294438
2018-01-02

Open-faced piston assembly

 #94
13828687
2017-02-21

Free piston pump and miniature internal combustion engine

 #95
13760802
2015-06-23

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