Patents-Review.com
ClassID:

143848 ⎘

F04C2250/30 - CPC Classification

Classification description:

Geometry of the stator

Sub-classes:
Recent Application in this class:
#1
20260071545
2026-03-12

COMPENSATION FOR ROTOR TILT IN HYBRID PDM STATORS

 #2
20250376581
2025-12-11

PLASTICIZER EXTENDING DYNAMIC FATIGUE LIFE IN FIBER REINFORCED ELASTOMERS

 #3
20250305496
2025-10-02

Rotary Machines With Teardrop-Shaped Rotors

 #4
20250290507
2025-09-18

PROGRESSING CAVITY DEVICES AND ASSEMBLIES FOR COUPLING MULTIPLE STAGES OF PROGRESSING CAVITY DEVICES

 #5
20250146490
2025-05-08

Parallel connected multiple shaft roots vacuum pump

 #6
20240426214
2024-12-26

ROTOR TILT COMPENSATION IN PDM STATORS

 #7
20240280099
2024-08-22

Sealing In Helical Trochoidal Rotary Machines

 #8
20240093686
2024-03-21

Axial Load In Helical Trochoidal Rotary Machines

 #9
20240044251
2024-02-08

High modulus liners in PDM stators with diameter reliefs compensating for rotor tilt

 #10
20230417246
2023-12-28

Static scroll applied in scroll compressor and scroll compressor

 #11
20230417242
2023-12-28

Rotary Machines With Teardrop-Shaped Rotors

 #12
20230358230
2023-11-09

Scroll compressor

 #13
20230167280
2023-06-01

PLASTICIZER REDUCING DYNAMIC FATIGUE IN FIBER REINFORCED ELASTOMERS

 #14
20230160383
2023-05-25

Compressor

 #15
20230098259
2023-03-30

Sealing in helical trochoidal rotary machines

 #16
20230076739
2023-03-09

Multiple stage vacuum pump

 #17
20230065707
2023-03-02

Positive displacement motor stators with diameter reliefs compensating for rotor tilt

 #18
20220228587
2022-07-21

Rotary compressor with unequally spaced vane slots

 #19
20220205445
2022-06-30

Axial load in helical trochoidal rotary machines

 #20
20220178371
2022-06-09

Scroll compressor and air conditioner having the same

 #21
20220145882
2022-05-12

PROGRESSING CAVITY DEVICES AND ASSEMBLIES FOR COUPLING MULTIPLE STAGES OF PROGRESSING CAVITY DEVICES

 #22
20210355938
2021-11-18

Screw pump with intersecting bores having a longer first axis of symmetry than a second axis of symmetry

 #23
20210324854
2021-10-21

PUMP APPARATUS

 #24
20210324853
2021-10-21

Stator with modular interior

 #25
20210310486
2021-10-07

Tapered stators in positive displacement motors remediating effects of rotor tilt

 #26
20210285440
2021-09-16

Fixed-eccentricity helical trochoidal rotary machines

 #27
20210239116
2021-08-05

Scroll compressor having internal fixed scroll with pillar design

 #28
20210199011
2021-07-01

Helical trochoidal rotary machines

 #29
20210189880
2021-06-24

Helical trochoidal rotary machines with offset

 #30
20210048025
2021-02-18

Vaned pump device having fluid pressure chambers located outside the cam ring to control cam ring eccentricity

 #31
20210025392
2021-01-28

Sealing in helical trochoidal rotary machines

 #32
20200362860
2020-11-19

Compact dual-section gear pump

 #33
20200224655
2020-07-16

Plasticizer improving dynamic fatigue performance in fiber reinforced elastomers

 #34
20190264685
2019-08-29

Rotary device having a circular guide ring

 #35
20190234215
2019-08-01

Rotary piston and cylinder device with single stator side

 #36
20190219144
2019-07-18

Cam liner for integrated drive generator

 #37
20190186204
2019-06-20

Stator and rotor profile for improved power section performance and reliability

 #38
20190085845
2019-03-21

Oscillating piston-type compressor

 #39
20180335031
2018-11-22

Scroll compressor for a vehicle air-conditioning system having spiral wall including conical cut

 #40
20180328359
2018-11-15

Method for impregnating the stator of a progressive cavity assembly with nanoparticles

 #41
20180238326
2018-08-23

A STATOR OF A ROTARY VANE-TYPE PUMP

 #42
20180207576
2018-07-26

Abatement system

 #43
20180187680
2018-07-05

Hermetic compressor with cylinder having elliptical inner circumferential surface, roller, and at least one vane

 #44
20180187549
2018-07-05

Double-working-medium expander used for two-stage organic Rankine cycle

 #45
20180010603
2018-01-11

Stator-rotor system and method for adjusting a stator in a stator-rotor system

 #46
20180003174
2018-01-04

Method to improve downhole motor durability

 #47
20160333876
2016-11-17

Vane pump

 #48
20160040480
2016-02-11

Variable diameter stator and rotor for progressing cavity motor

 #49
20160003244
2016-01-07

Eccentric screw pump with overpressure protection

 #50
20150183459
2015-07-02

Power steering apparatus

 #51
20150147216
2015-05-28

Gas compressor

 #52
20150068480
2015-03-12

Oscillating piston engine having a polygonal piston

 #53
20150064042
2015-03-05

Gas compressor having an asymmetric cylinder chamber

 #54
20150034041
2015-02-05

Internal combustion rotary engine

 #55
20140369878
2014-12-18

Gas compressor with discharge section and sub-discharge section

 #56
20140308149
2014-10-16

Long reach spindle drive systems and method

 #57
20140069734
2014-03-13

Power steering apparatus

 #58
20130236348
2013-09-12

Rotary piston pump and casing half-shells for same

 #59
20130202472
2013-08-08

Oval chamber vane pump

 #60
20130202468
2013-08-08

Oval chamber vane pump

 #61
20130177466
2013-07-11

Rotary vane pumps with asymmetrical chamber cavities

 #62
20130034460
2013-02-07

Variable Displacement Vane Pump

 #63
20120070327
2012-03-22

Pre-pressurization pump liner for vane pump

 #64
20100129170
2010-05-27

Long reach spindle drive systems and method

 #65
20070128065
2007-06-07

Pump

 #66
18987978
2025-12-23

Single sliding vane rotary displacement pump