ClassID:

136894

F01D11/20 - CPC Classification

Classification description:

Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator; Adjusting or regulating tip-clearance, i.e. distance between rotor-blade tips and stator casing Actively adjusting tip-clearance

Sub-classes:
Recent Application in this class:
#1
20260153037
2026-06-04

ACTIVE CLEARANCE CONTROL VALVES AND RELATED METHODS

#2
20250383024
2025-12-18

PRESSURE REGULATION VALVES

#3
20250101875
2025-03-27

Turbine assembly with spring biased clearance sensor mount

#4
20250059921
2025-02-20

System and method for reducing a clearance gap in an engine

#5
20250043691
2025-02-06

GAS TURBINE ENGINE HAVING OPTIMIZED ACCELERATION RATES BASED ON CLEARANCES

#6
20240352866
2024-10-24

ACTIVE CLEARANCE CONTROL ASSEMBLY

#7
20240352865
2024-10-24

BLADE TIP CLEARANCE CONTROL USING MATERIAL WITH NEGATIVE THERMAL EXPANSION COEFFICIENTS

#8
20240337198
2024-10-10

FAST RESPONSE ACTIVE CLEARANCE SYSTEMS WITH PIEZOELECTRIC ACTUATOR IN AXIAL, AXIAL/RADIAL COMBINED, AND CIRCUMFERENTIAL DIRECTIONS

#9
20240068375
2024-02-29

ACTIVE CLEARANCE CONTROL VALVES AND RELATED METHODS

#10
20240018912
2024-01-18

LOAD ADJUSTMENT METHOD, LOAD ADJUSTMENT DEVICE, AND PROGRAM

#11
20240018878
2024-01-18

Active clearance control of fan blade tip closure using a variable sleeve system

#12
20230358147
2023-11-09

Fast response active clearance systems with piezoelectric actuator in axial, axial/radial combined, and circumferential directions

#13
20230235680
2023-07-27

NON-UNIFORM TURBOMACHINERY BLADE TIPS FOR FREQUENCY TUNING

#14
20230184127
2023-06-15

Rotary vane device with longitudinally extending seals

#15
20230046718
2023-02-16

Methods and systems for operating an engine to generate additional thrust

#16
20230028412
2023-01-26

Methods and apparatus for real-time clearance assessment using a pressure measurement

#17
20220389828
2022-12-08

Warm start control of an active clearance control for a gas turbine engine

#18
20220341345
2022-10-27

Turbine containment system

#19
20220341340
2022-10-27

Systems and methods for controlling blade tip clearances

#20
20220213801
2022-07-07

Methods and apparatus for real-time clearance assessment using a pressure measurement

#21
20220162997
2022-05-26

Method for regulating the temperature of the exhaust gases of a turbomachine

#22
20210087948
2021-03-25

SEALED CMC TURBINE CASE

#23
20210079846
2021-03-18

Gas turbine and method for blade ring production method

#24
20200347741
2020-11-05

Cooled cooling air for blade air seal through outer chamber

#25
20200332726
2020-10-22

Active multi-effector control of high pressure turbine clearances

#26
20200240281
2020-07-30

Method and device for adjusting the clearance between a rotor and a concentric stator of an aircraft turbine engine

#27
20200157965
2020-05-21

Mechanical iris tip clearance control

#28
20200025149
2020-01-23

Stability margin and clearance control using power extraction and assist of a gas turbine engine

#29
20200025019
2020-01-23

Systems and methods for controlling blade tip clearances

#30
20200025007
2020-01-23

Seal assembly for turbine engine component

#31
20200003157
2020-01-02

Counter rotating turbine with reversing reduction gearbox

#32
20190383304
2019-12-19

Passive clearance control for a centrifugal impeller shroud

#33
20190218926
2019-07-18

Non-contact seal with angled land

#34
20190193842
2019-06-27

Rotor support device, rotor, gas turbine engine, and aircraft

#35
20190189901
2019-06-20

Sensor assembly for gas turbine engines

#36
20190186277
2019-06-20

Cooling hole for a gas turbine engine component

#37
20190120076
2019-04-25

Adjustable blade outer air seal apparatus

#38
20190093559
2019-03-28

Device for cooling a turbine casing with air jets

#39
20190085790
2019-03-21

Gas turbine engine with minimal tolerance between the fan and the fan casing

#40
20190078869
2019-03-14

Low profile embedded blade tip clearance sensor

#41
20190064237
2019-02-28

Sensor and method of manufacturing same

#42
20190017407
2019-01-17

Actuator for gas turbine engine blade outer air seal

#43
20190017406
2019-01-17

Method and apparatus for sealing components of a gas turbine engine with a dielectric barrier discharge plasma actuator

#44
20190010821
2019-01-10

SYSTEMS AND METHODS FOR VIRTUAL CLEARANCE MEASUREMENT IN A GAS TURBINE

#45
20190003397
2019-01-03

Propulsion system for an aircraft

#46
20190002116
2019-01-03

Propulsion system for an aircraft

#47
20180372158
2018-12-27

Seal fin, seal structure, and turbo machine

#48
20180371997
2018-12-27

Clearance control device

#49
20180355762
2018-12-13

Resilient mounting assembly for a turbine engine

#50
20180340441
2018-11-29

Optical fiber probe, optical fiber measuring device, and clearance control system

#51
20180328186
2018-11-15

Airfoil structure manufacturing method

#52
20180320541
2018-11-08

Re-use and modulated cooling from tip clearance control system for gas turbine engine

#53
20180291760
2018-10-11

COOLING AIR CHAMBER FOR BLADE OUTER AIR SEAL

#54
20180283196
2018-10-04

Movable air seal for gas turbine engine

#55
20180283195
2018-10-04

Cooled cooling air for blade air seal through outer chamber

#56
20180258785
2018-09-13

Adaptive active clearance control logic

#57
20180245403
2018-08-30

Downhole turbine with an adjustable shroud

#58
20180195404
2018-07-12

Controlling tip clearance in a turbine

#59
20180142567
2018-05-24

SEALING SYSTEM FOR AN AXIAL TURBOMACHINE AND AXIAL TURBOMACHINE

#60
20180112550
2018-04-26

Blade tip clearance control for an axial compressor with radially outer annulus

#61
20180038238
2018-02-08

Adjustable blade outer air seal system

#62
20180030846
2018-02-01

Gas turbine engine active clearance control system

#63
20170370242
2017-12-28

Tip clearance control system

#64
20170328232
2017-11-16

Clearance-control-type seal structure

#65
20170326989
2017-11-16

FLUID MACHINE WITH PLASMA ACTUATOR

#66
20170321568
2017-11-09

Impingement manifold

#67
20170306785
2017-10-26

Gas turbine engine having high pressure compressor case active clearance control system

#68
20170260869
2017-09-14

Gas turbine engine with compliant layer for turbine shroud mounts

#69
20170167273
2017-06-15

Gas turbine engine turbine cooling system

#70
20170160070
2017-06-08

Embedded cap probe

#71
20170138212
2017-05-18

Rotor tip clearance

#72
20170122840
2017-05-04

Probe retention-sealing feature

#73
20170067354
2017-03-09

Seal assembly for turbine engine component

#74
20170051627
2017-02-23

Turbine shroud assembly

#75
20160376921
2016-12-29

Turbine shroud segment with integrated cooling air distribution system

#76
20160369644
2016-12-22

Gas turbine rapid response clearance control system with annular piston

#77
20160356169
2016-12-08

Turbine engine tip clearance control system with rocker arms

#78
20160312645
2016-10-27

Turbomachine blade clearance control system

#79
20160312644
2016-10-27

Accessible rapid response clearance control system

#80
20160305268
2016-10-20

Rapid response clearance control system with spring assist for gas turbine engine

#81
20160237851
2016-08-18

Probe tip cooling

#82
20160230583
2016-08-11

Blade tip clearance control system including BOAS support

#83
20160215644
2016-07-28

Seal for gas turbine engine

#84
20160195411
2016-07-07

Encapsulated soft-lead capacitance probe for a gas turbine engine

#85
20160177769
2016-06-23

Gas turbine engine with rotor blade tip clearance flow control

#86
20160061210
2016-03-03

Turbo compressor and turbo chiller using same

#87
20160053628
2016-02-25

Rapid response clearance control system for gas turbine engine

#88
20160053627
2016-02-25

Flexible feather seal for blade outer air seal gas turbine engine rapid response clearance control system

#89
20160053626
2016-02-25

Gas turbine engine rapid response clearance control system with air seal segment interface

#90
20160053624
2016-02-25

Radial position control of case supported structure with axial reaction member

#91
20160047269
2016-02-18

Smart active clearance control between a rotor blade and a shroud

#92
20160047266
2016-02-18

Movable air seal for gas turbine engine

#93
20160032754
2016-02-04

Adjustable blade outer air seal apparatus

#94
20160017743
2016-01-21

Actuator for gas turbine engine blade outer air seal

#95
20160010560
2016-01-14

Sealing features for a gas turbine engine

#96
20160010473
2016-01-14

Cooling hole for a gas turbine engine component

#97
20160003085
2016-01-07

Turbine engine adaptive low leakage air seal

#98
20150377058
2015-12-31

Axial turbomachine compressor inner shell

#99
20150369077
2015-12-24

Suction-based active clearance control system

#100
20150337673
2015-11-26

Segmented clearance control ring

#101
20150323301
2015-11-12

High sensitivity inductive sensor for measuring blade tip clearance

#102
20150267727
2015-09-24

Surface plasma actuator

#103
20150252683
2015-09-10

System and method for active clearance control

#104
20150247417
2015-09-03

Rotor tip clearance

#105
20150159500
2015-06-11

System and method for turbine blade clearance control

#106
20150159499
2015-06-11

Control of a gas turbine engine

#107
20150142216
2015-05-21

Gas turbine engine turbine blade tip active clearance control system and method

#108
20150132108
2015-05-14

Edge detector

#109
20150044018
2015-02-12

Active seal system

#110
20150037145
2015-02-05

Systems relating to axial positioning turbine casings and blade tip clearance in gas turbine engines

#111
20150003972
2015-01-01

Turbine seal assembly and turbine apparatus comprising the turbine seal assembly

#112
20140369833
2014-12-18

Methods and systems for blade health monitoring

#113
20140366613
2014-12-18

Probe retention-sealing feature

#114
20140321985
2014-10-30

Rotor tip clearance

#115
20140321982
2014-10-30

Turbine blade monitoring arrangement and method of manufacturing

#116
20140252183
2014-09-11

Sensor hoop storage and transport apparatus

#117
20140230555
2014-08-21

Method of detecting and localizing partial rotor-stator rubbing during the operation of a turbine

#118
20140112765
2014-04-24

Fluidic actuator

#119
20140112759
2014-04-24

Gas turbine casing thermal control device

#120
20140112757
2014-04-24

Clearance control

#121
20140109590
2014-04-24

Gas turbine thermal control and related method

#122
20140090492
2014-04-03

Embedded cap probe

#123
20140064926
2014-03-06

High temperature split-face probe

#124
20140002050
2014-01-02

Voltage regulator circuitry operable in a high temperature environment of a turbine engine

#125
20130321000
2013-12-05

Rotational clearance measurement system and method of operation

#126
20130209240
2013-08-15

Adjustable blade outer air seal apparatus

#127
20130191004
2013-07-25

Gas turbine engine control

#128
20130156541
2013-06-20

Active turbine tip clearance control system

#129
20130149117
2013-06-13

Steam turbine casing position adjusting apparatus

#130
20130034424
2013-02-07

Tip clearance control device

#131
20130002358
2013-01-03

Electronic circuitry for high-temperature environments

#132
20120167588
2012-07-05

Compressor tip clearance control and gas turbine engine

#133
20120156007
2012-06-21

Clearance control arrangement

#134
20120032689
2012-02-09

Blade tip clearance measurement sensor for gas turbine engines

#135
20120019237
2012-01-26

Blade tip clearance measurement sensor for gas turbine engines

#136
20110243708
2011-10-06

Methods, systems and apparatus relating to tip clearance calculations in turbine engines

#137
20110236182
2011-09-29

Control of blade tip-to-shroud leakage in a turbine engine by directed plasma flow

#138
20110188994
2011-08-04

Method and system for determining gas turbine tip clearance

#139
20100284795
2010-11-11

Plasma Clearance Controlled Compressor

#140
20100268509
2010-10-21

Turbomachine, gap-measuring system, and method for determining a rotor gap

#141
20100247283
2010-09-30

Method and apparatus for clearance control

#142
20100218506
2010-09-02

Methods and systems for controlling gas turbine clearance

#143
20100213929
2010-08-26

ROTOR BLADE SENSOR

#144
20100177299
2010-07-15

Differential focus blade clearance probe

#145
20100168981
2010-07-01

Differential focus blade clearance probe and methods for using same

#146
20100100248
2010-04-22

Methods and systems for neural network modeling of turbine components

#147
20100080691
2010-04-01

Magnetic adjustment of turbomachinery components

#148
20100079136
2010-04-01

Blade tip clearance measurement sensor and method for gas turbine engines

#149
20100078893
2010-04-01

ACTIVE RETRACTABLE SEAL FOR TURBOMACHINERY AND RELATED METHOD

#150
20100040453
2010-02-18

Apparatus and method for controlling a compressor

#151
20090319150
2009-12-24

Method, system, and apparatus for reducing a turbine clearance

#152
20090280002
2009-11-12

Method and system for determining gas turbine tip clearance

#153
20090065064
2009-03-12

COMPRESSOR TIP GAP FLOW CONTROL USING PLASMA ACTUATORS

#154
20090053042
2009-02-26

METHOD AND APPARATUS FOR CLEARANCE CONTROL OF TURBINE BLADE TIP

#155
20090003991
2009-01-01

System and method for turbine engine clearance control with rub detection

#156
20080267769
2008-10-30

Gas turbine engine blade tip clearance apparatus and method

#157
20080247863
2008-10-09

Sensor

#158
20080206039
2008-08-28

Tip clearance control system

#159
20080131270
2008-06-05

Blade clearance system for a turbine engine

#160
20080089775
2008-04-17

Plasma blade tip clearance control

#161
20080069683
2008-03-20

METHODS AND SYSTEMS FOR CONTROLLING GAS TURBINE CLEARANCE

#162
20070295402
2007-12-27

Pressurized gas supply and control system for actuation of active seals in turbomachinery

#163
20070128016
2007-06-07

Multi-range clearance measurement system and method of operation

#164
20060120851
2006-06-08

Gas turbine apparatus with actuators to counteract deformations of housing

#165
20050286995
2005-12-29

Method and system for determining gas turbine tip clearance

#166
20050196270
2005-09-08

Device for axially holding a ring spacer sector of a high-pressure turbine of a turbomachine

#167
20050069406
2005-03-31

Method and apparatus for turbomachine active clearance control

#168
19207845
2025-12-23

Clearance probe assembly using replenishable, contacting elongated clearance tip

#169
18966925
2026-03-24

Open rotor gas turbine engine with adaptive turbine clearance control system and method

#170
18778489
2025-07-08

Open rotor variable pitch blade with retracting inboard trailing edge