F04C2/12 - CPC Classification Index

ClassID:

143432 ⎘

F04C2/12 - 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

Sub-classes:

F04C2/123 » {with radially or approximately radially from the rotor body extending tooth-like elements, co-operating with recesses in the other rotor, e.g. one tooth} 23
F04C2/126 » {with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type} 80
F04C2/14 » with toothed rotary pistons 125

Recent Application in this class:

20240044331

2024-02-08

Torque transfer gear pump

20230287884

2023-09-14

Gerotor and pump apparatus having a gerotor device

20230021042

2023-01-19

Horizontal type rotary compressor and home appliance including the same

20210381505

2021-12-09

Method of monitoring a volume index valve of a compressor and diagnostic system

20200224664

2020-07-16

Pump device, especially for mobile means of transport

20190301454

2019-10-03

Rotary piston pump having a sealing chamber seal

20190055941

2019-02-21

Pump Assembly Having an Axial-Flux Electric Drive

20180119695

2018-05-03

Gear pump and method for realising it

20160032922

2016-02-04

Gear pump drive gear stationary bearing

#10

20150337705

2015-11-26

Hydraulic circuit system for forced regeneration of diesel particulate filter

#11

20150275893

2015-10-01

Rotary piston pump having direct drive

#12

20150219096

2015-08-06

Erosion, Corrosion, and Fatigue Prevention for High-Pressure Pumps

#13

20150167608

2015-06-18

Vane pump

#14

20150075483

2015-03-19

Rotary internal combustion engine with exhaust purge

#15

20150064041

2015-03-05

Positive displacement pump with improved sealing arrangement and related method of making

#16

20150056063

2015-02-26

Metering pump made of plastic

#17

20140345451

2014-11-27

Method and device for fixing and synchronizing rotary pistons in a rotary piston pump

#18

20140010698

2014-01-09

Multiple segment lobe pump

#19

20130202474

2013-08-08

Rotary lobe pump having inlet and outlet aligned with gearbox casing

#20

20130028768

2013-01-31

Rotary internal combustion engine with exhaust purge

#21

20130020070

2013-01-24

Oil well pump apparatus

#22

20120244021

2012-09-27

PUMP MOUNTING STRUCTURE

#23

20100215538

2010-08-26

Fuel pump

#24

20100202913

2010-08-12

GEAR PUMP

#25

20100183467

2010-07-22

Portable, rotary vane vacuum pump with automatic vacuum breaking arrangement

#26

20090304540

2009-12-10

PD pumps with a common gearbox module and varying capacities and easy access to mechanical seals

#27

20090016899

2009-01-15

Oil well pump apparatus