ClassID:

142841

F04B27/0409 - CPC Classification

Classification description:

Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement; Details, component parts specially adapted for such pumps Pistons

Recent Application in this class:
#1
20230287889
2023-09-14

Unified air compressor

#2
20220325707
2022-10-13

Unified air compressor

#3
20210215148
2021-07-15

METHOD AND EQUIPMENT FOR IMPROVING THE EFFICIENCY OF COMPRESSORS AND REFRIGERATORS

#4
20200340581
2020-10-29

Piston-type positive displacement machine with a pressure-adaptive piston-cylinder interface

#5
20190137151
2019-05-09

Reciprocating refrigeration compressor wrist pin retention

#6
20190137150
2019-05-09

Reciprocating refrigeration compressor wrist pin retention

#7
20190093646
2019-03-28

Reciprocating type compressor

#8
20180195503
2018-07-12

FLUID COMPRESSOR

#9
20180135609
2018-05-17

Air-conditioner compressor for vehicle

#10
20180100493
2018-04-12

Piston cylinder arrangement for an oil free compressor having cooling passageways and method of cooling wrist pin bearing surface

#11
20170373766
2017-12-28

System for piston rod monitoring

#12
20170254320
2017-09-07

Engine compressor unit

#13
20170030346
2017-02-02

Sealed cavity compressor to reduce contaminant induction

#14
20160281701
2016-09-29

Method and equipment for improving the efficiency of compressors and refrigerators

#15
20160115949
2016-04-28

Piston drive device

#16
20150314657
2015-11-05

System for an air maintenance tire assembly

#17
20150219374
2015-08-06

Reciprocating refrigeration compressor wrist pin retention

#18
20140294636
2014-10-02

Reciprocating compressor

#19
20130209301
2013-08-15

Radial piston machine and piston for a radial piston machine of this type

#20
20120079936
2012-04-05

POSITIVE DISPLACEMENT MACHINE PISTON WITH WAVY SURFACE FORM

#21
20120023973
2012-02-02

METHOD AND EQUIPMENT FOR IMPROVING THE EFFICIENCY OF COMPRESSORS AND REFRIGERATORS

#22
20120020823
2012-01-26

Rotating and reciprocating piston device

#23
20110280750
2011-11-17

Reciprocating Refrigeration Compressor

#24
20110198887
2011-08-18

DOUBLE-ACTING PISTON COMPRESSOR OF WHICH THE PISTON IS GUIDED BY A ROLLER AND DRIVEN BY A PINION AND RACKS

#25
20110132190
2011-06-09

PISTON MACHINE FOR USE AS A VACUUM PUMP FOR MEDICAL PURPOSES

#26
20080273999
2008-11-06

Machine for compressing gasses and refrigerant vapors