F04C2/126 - CPC Classification Index

ClassID:

143434 ⎘

F04C2/126 - CPC Classification

Classification description:

Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type

Recent Application in this class:

20250290509

2025-09-18

EXTERNAL GEAR AND ROTOR HYBRID PUMP

20250207582

2025-06-26

POSITIVE DISPLACEMENT PUMP WITH PRESSURE RELIEF

20250137455

2025-05-01

PUMP AND METHOD FOR ADJUSTING THE DELIVERY RATE OF A PUMP

20250003405

2025-01-02

Stator for a Pump and Method for Producing a Stator for a Pump

20240384720

2024-11-21

Rotary positive displacement device

20240352930

2024-10-24

POSITIVE DISPLACEMENT PUMP WITH PRESSURE RELIEF

20240328417

2024-10-03

Vacuum system having condenser and root vacuum pump set

20240287986

2024-08-29

Roots pump

20240060489

2024-02-22

PUMP FOR CONVEYING A FLUID

#10

20240052834

2024-02-15

Rotary positive displacement pump

#11

20230265849

2023-08-24

Low coefficient of expansion rotors for vacuum boosters

#12

20230138342

2023-05-04

Rotary positive displacement pump

#13

20230119471

2023-04-20

Positive displacement pump with pressure relief

#14

20220252066

2022-08-11

Split power gerotor pump

#15

20220243727

2022-08-04

ROTOR AND PUMP

#16

20220098025

2022-03-31

Transfer assembly for attachment to a front portion of an agricultural vehicle and a method of use

#17

20220065246

2022-03-03

Rotary pump with rotor bearing ring

#18

20220062796

2022-03-03

Multiphase separation and pressure letdown method

#19

20220025883

2022-01-27

Rotary lobe pump with internal bearing

#20

20210372399

2021-12-02

HIGH PRESSURE PUMP

#21

20210340979

2021-11-04

Roots pump having a seal member with first and second projections

#22

20210332817

2021-10-28

POSITIVE DISPLACEMENT PUMP WITH PRESSURE RELIEF

#23

20210270265

2021-09-02

Low coefficient of expansion rotors for vacuum boosters

#24

20210131341

2021-05-06

Method of operating a four stroke internal combustion engine system

#25

20210115918

2021-04-22

Method to determine the reasonable design area of rotor profile of roots pump and its application

#26

20210088121

2021-03-25

Transmission structure of motor connection of roots pump

#27

20200224664

2020-07-16

Pump device, especially for mobile means of transport

#28

20200116148

2020-04-16

TWIN ROTOR DEVICES WITH INTERNAL CLEARANCES REDUCED BY A COATING AFTER ASSEMBLY, A COATING SYSTEM, AND METHODS

#29

20200032790

2020-01-30

Positive Displacement Pump With Shaft-Mounted Sleeve

#30

20190234403

2019-08-01

Pump for melted thermoplastic materials

#31

20190226480

2019-07-25

Motor-driven roots pump

#32

20190203708

2019-07-04

HOLLOW ROTOR LOBE AND CONTROL OF TIP DEFLECTION

#33

20190136859

2019-05-09

SIMPLIFIED ROOTS-TYPE BLOWER

#34

20190110375

2019-04-11

Dual motor gear pump

#35

20190110374

2019-04-11

Coolant distribution unit

#36

20190048872

2019-02-14

Rotary piston pump with a piston formed by a plurality of plates filled with polymer material

#37

20180274537

2018-09-27

Pump for dispensing liquid or semi-liquid or semi-solid food products and machine comprising said pump

#38

20180245586

2018-08-30

Self-priming positive displacement pump with sectioned dividing wall

#39

20180245585

2018-08-30

Positive displacement pump with pressure relief

#40

20180209418

2018-07-26

Lobe gear pump with inducer assembly and centrifugal pump having one fluid flow path

#41

20180135627

2018-05-17

Fluid working systems

#42

20180126203

2018-05-10

HIGH-VISCOSITY FIRE SUPPRESSANT DELIVERY SYSTEM USING AN INJECTION QUILL

#43

20180106170

2018-04-19

Internal combustion engine having at least one crankcase of the dry-sump type

#44

20180079005

2018-03-22

Sintering a Multi-lobed Helical Rotor

#45

20170306949

2017-10-26

Rotary piston pump, method for fixing rotary pistons of a rotary piston pump and method for dismantling rotary pistons of a rotary piston pump

#46

20170146012

2017-05-25

Twin rotor devices with internal clearances reduced by a coating after assembly, a coating system, and methods

#47

20170089337

2017-03-30

Arrangement for specifying a pressure

#48

20170074121

2017-03-16

COOLANT ENERGY AND EXHAUST ENERGY RECOVERY SYSTEM

#49

20160327038

2016-11-10

Fluid working systems

#50

20160281712

2016-09-29

TANDEM ELECTRIC PUMP

#51

20160281709

2016-09-29

Multiple segment lobe pump

#52

20160245281

2016-08-25

Rotary piston pump made of plastic

#53

20160097390

2016-04-07

Vacuum pump rotor for a vacuum pump having a roots pumping mechanism

#54

20160053757

2016-02-25

Metering pump made of plastic

#55

20150285248

2015-10-08

ROTARY LOBE PUMP WITH WIPER BLADES

#56

20150225593

2015-08-13

Method for smoothing a perfluoro alkoxy alkane film surface

#57

20150184653

2015-07-02

Fan-shaped rotor set with balance positioning apertures

#58

20150139831

2015-05-21

Pump module and electric pump including the same

#59

20150056063

2015-02-26

Metering pump made of plastic

#60

20150050174

2015-02-19

Rotary piston pump with optimised inlets and outlets

#61

20140348687

2014-11-27

Rotary piston pump with slip ring seals for improved fitting and synchronization of rotary pistons

#62

20140331856

2014-11-13

Piston with replaceable and/or adjustable surfaces

#63

20140294648

2014-10-02

Apparatus for sealing a pump chamber of a rotary lobe pump, and a rotary lobe pump having said apparatus

#64

20140271312

2014-09-18

Piston with replaceable and/or adjustable surfaces

#65

20140127031

2014-05-08

SCREW ROTOR FOR EXHAUST PUMP, METHOD FOR MANUFACTURING THE SAME, GAS EXHAUST PUMP HAVING SCREW ROTOR, AND MANUFACTURING METHOD AND ASSEMBLY METHOD OF THE SAME

#66