ClassID:

142654

F04B1/34 - CPC Classification

Classification description:

Multi-cylinder machines or pumps characterised by number or arrangement of cylinders Control not provided for in groups , , or

Recent Application in this class:
#1
20250249568
2025-08-07

HYDRAULIC PUMP

#2
20240410348
2024-12-12

Pump-Based Fluid Flow Meter

#3
20240287972
2024-08-29

FRACTURING APPARATUS

#4
20240261953
2024-08-08

Hydraulic pump

#5
20240183344
2024-06-06

Efficient five-cylinder drilling pump system, solids control system and drilling rig

#6
20230332583
2023-10-19

Fracturing apparatus

#7
20230105578
2023-04-06

Variable positive displacement pump actuator systems

#8
20230093786
2023-03-23

Hydraulic Pump

#9
20230081097
2023-03-16

PUMP FOR DISPENSING MEASURED LIQUIDS IN A CONSISTENT PROPORTIONAL AMOUNT

#10
20220364453
2022-11-17

Fracturing apparatus

#11
20220205440
2022-06-30

Liquid feed pump and liquid chromatography device

#12
20220049687
2022-02-17

Pump having a pressure sensor to displace a known volume of fluid from a reservoir, which stretches and contracts

#13
20210164501
2021-06-03

Hydraulic axial piston unit and method for controlling of a hydraulic axial piston unit

#14
20200003202
2020-01-02

Method and system for metering fluid flow from a fluid source based on a count of pump strokes

#15
20200001446
2020-01-02

Hydraulic piston pump for a hydraulic tool

#16
20190309737
2019-10-10

Viscous material pump with adjustable limitation of the delivery pressure

#17
20190009113
2019-01-10

RESCUE SYSTEM FROM HIGH RISE APARTMENTS WITH AUTOMATIC HYDRO MECHANIC CONTROL AND WITHOUT ELECTRICITY

#18
20180328350
2018-11-15

Variable displacement pump

#19
20170002806
2017-01-05

Hydraulic pump assembly for a vehicle

#20
20160356276
2016-12-08

Direct numeric affinity pumps sensorless converter

#21
20160048133
2016-02-18

Hydraulic pump assembly

#22
20150013317
2015-01-15

Responsive three-dimensional surface controller

#23
20130243611
2013-09-19

Hydraulically driven cooling fan responsive to engine load

#24
20120308409
2012-12-06

Pump based fluid flow meter

#25
20100322791
2010-12-23

Hydraulic system with supplement pump

#26
20100247338
2010-09-30

High pressure variable displacement piston pump

#27
20090229456
2009-09-17

Device and method for state monitoring in hydrostatic displacement units

#28
20090078241
2009-03-26

METHOD FOR ADJUSTING A DISPLACEMENT PUMP THAT HAS A VARIABLE VOLUME FLOW RATE IN AN INTERNAL COMBUSTION ENGINE