ClassID:

143587

F04C18/165 - 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 with helical teeth, e.g. chevron-shaped, screw type having more than two rotary pistons with parallel axes

Recent Application in this class:
#1
20250264103
2025-08-21

SCAVENGE LOSS LIMITER FOR A ROTARY COMPRESSOR

#2
20240328419
2024-10-03

SCREW PUMP, SCREW ROTOR, METHOD OF MANUFACTURING A SCREW ROTOR, AND USE OF A SCREW PUMP OR A SCREW ROTOR

#3
20240125322
2024-04-18

Screw assembly for a triple screw pump and triple screw pump comprising said assembly

#4
20240084802
2024-03-14

Rotor assembly, compressor and air conditioner

#5
20240035471
2024-02-01

Compressor with two rotors coaxially disposed on a connecting assembly sleeved on the shaft that limits relative movement between them

#6
20240003255
2024-01-04

Rotor unit assembly

#7
20220349404
2022-11-03

Screw compressor

#8
20210140430
2021-05-13

MULTI-STAGE ROTARY PISTON PUMP

#9
20210088044
2021-03-25

Driving structure of three-axis multi-stage roots pump

#10
20200096235
2020-03-26

Screw compressor for HVAC

#11
20190331113
2019-10-31

Fluid machine with helically lobed rotors

#12
20190186487
2019-06-20

Method for modifying performance of rotor profile by adjusting meshing line segments

#13
20140255232
2014-09-11

Planetary rotor machine manifold

#14
20140178238
2014-06-26

Pump, pump system and method for pumping a medium

#15
20110262290
2011-10-27

Screw compressor with asymmetric ports

#16
20110182762
2011-07-28

Screw compressor with a sound dampening device that separates lubricant

#17
20110016895
2011-01-27

Methods and Systems for Injecting Liquid Into a Screw Compressor for Noise Suppression

#18
20100135839
2010-06-03

SCREW COMPRESSOR WITH INTEGRAL BEARING COVER AND DISCHARGE PLENUM DIVIDER

#19
20090304538
2009-12-10

Modular multi-rotor compressor and method of manufacture

#20
20090068028
2009-03-12

Compressor muffler

#21
20090060759
2009-03-05

Compressor sound suppression

#22
20080260547
2008-10-23

Compressor sound suppression

#23
20080257640
2008-10-23

Compressor muffler

#24
20080163473
2008-07-10

Method of manufacture, remanufacture, or repair of a compressor

#25
20070286758
2007-12-13

Screw compressor having asymmetric seal around rotor axis

#26
20070020112
2007-01-25

Compressor sound suppression

#27
20060073028
2006-04-06

Compressor sound suppression

#28
20060065478
2006-03-30

Compressor sound suppression

#29
20050223726
2005-10-13

Compressor

#30
20050186095
2005-08-25

Lubrication system for compressor

#31
20050106054
2005-05-19

Compressor discharge chamber with baffle plate

#32
20050099075
2005-05-12

Hermetic motor and gas booster

#33
18581865
2025-02-04

Scavenge loss limiter for a rotary compressor