ClassID:

143585

F04C18/14 - CPC Classification

Classification description:

Rotary-piston pumps specially adapted for elastic fluids 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 toothed rotary pistons

Sub-classes:
Recent Application in this class:
#1
20250230813
2025-07-17

COMPRESSOR DEVICE AND COMPRESSOR ASSEMBLY COMPRISING SUCH A COMPRESSOR DEVICE

#2
20250122877
2025-04-17

COMPRESSOR ASSEMBLY COMPRISING A MOTOR DRIVING ONE OR MORE COMPRESSOR ROTORS AND METHOD FOR FABRICATING A HOUSING PART OF SUCH A COMPRESSOR ASSEMBLY

#3
20230392598
2023-12-07

Screw compressor and screw rotor

#4
20230374958
2023-11-23

EGR pump system and control method of EGR pump

#5
20230366400
2023-11-16

Gas compressor

#6
20230304497
2023-09-28

Roots pump containing rotors that capture and discharge a foreign substance

#7
20220127962
2022-04-28

Multistage pump body and multistage gas pump

#8
20210190060
2021-06-24

Liquid-cooled type compressor having first and second nozzle injection ports with different characteristics

#9
20210071667
2021-03-11

EGR pump system and control method of EGR pump

#10
20210071664
2021-03-11

EGR pump system and control method of EGR pump

#11
20200040896
2020-02-06

SCREW COMPRESSOR

#12
20180230994
2018-08-16

Rotor assemblies having radial deformation control members

#13
20170335846
2017-11-23

Gear Pump

#14
20170298966
2017-10-19

Magnetically controlled valve and pump devices and methods of using the same

#15
20170175736
2017-06-22

Gear pump with end plates or bearings having spiral grooves

#16
20170089342
2017-03-30

Spindle compressor using refrigerant cooling for housing and rotor

#17
20160186757
2016-06-30

Compressor with a closed loop water cooling system

#18
20160108914
2016-04-21

Gear pump

#19
20160032922
2016-02-04

Gear pump drive gear stationary bearing

#20
20150337836
2015-11-26

Gear pump

#21
20150118093
2015-04-30

SPINDLE COMPRESSOR

#22
20090165441
2009-07-02

Combustion engine with feedback gear/rotary pump input

#23
18197743
2024-06-25

Oil box device of a roots vacuum pump with a crossed cooling water tube set