ClassID:

143576

F04C18/088 - 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; Details specially related to intermeshing engagement type pumps Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement

Recent Application in this class:
#1
20260146608
2026-05-28

COMPLEX SCREW ROTORS

#2
20250354555
2025-11-20

SUPERCHARGER ROTORS FOR INCREASED ENGINE POWER OUTPUT

#3
20240426298
2024-12-26

COMPLEX SCREW ROTORS

#4
20240209856
2024-06-27

SUPERCHARGER ROTORS FOR INCREASED ENGINE POWER OUTPUT

#5
20240191713
2024-06-13

Slide Valve for a Twin-Screw Compressor

#6
20230272797
2023-08-31

Complex screw rotors having multiple helical profiles joined by a centeral portion with a pocket

#7
20220389930
2022-12-08

Multi-stage pump apparatus including sealing member

#8
20210231122
2021-07-29

Complex screw rotors

#9
20200291942
2020-09-17

Slide valve for a twin-screw compressor

#10
20190128260
2019-05-02

Opposed screw compressor having non-interference system

#11
20180274541
2018-09-27

Oil-injected vacuum pump element

#12
20180258934
2018-09-13

Complex screw rotors

#13
20160230813
2016-08-11

Metallic insert with smooth contours for use with composite working members

#14
20160169224
2016-06-16

Gear pump bearing dam

#15
20160108733
2016-04-21

Silent gear pump or motor suppressing troubles of trapping fluid

#16
20150147211
2015-05-28

Gear pump bearing dam

#17
20150118086
2015-04-30

Optimized helix angle rotors for roots-style supercharger

#18
20100074784
2010-03-25

Scroll compressor having optimized cylinder oil circulation rate of lubricant

#19
20090191083
2009-07-30

Rotary blower with isothermal air jacket

#20
20090000872
2009-01-01

Compressor with dual pathways for returning lubricating oil

#21
20070122302
2007-05-31

Ductile cast iron scroll compressor

#22
20070065325
2007-03-22

Scroll compressor with bypass holes communicating with an intake chamber

#23
20050220651
2005-10-06

Scroll type hydraulic machine

#24
20050129536
2005-06-16

Compressor including separation tube engagement mechanism

#25
20050084397
2005-04-21

Gas compressor

#26
20050053507
2005-03-10

Scroll compressor