Inventor
MA PENGFEI
US55 patents
⚠️ This page may combine multiple inventors who share the name “MA PENGFEI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CATERPILLAR INC
27 patentsUS7908852B2Mar 22, 2011
Control system for recovering swing motor kinetic energy
CATERPILLAR INC57 citations95
US7059126B2Jun 13, 2006
System for preventing swing wag for a work machine with a boom assembly
CATERPILLAR INC21 citations92
US9809958B2Nov 7, 2017
Engine assist by recovering swing kinetic energy
CATERPILLAR INC7 citations84
US9945396B2Apr 17, 2018
Fluid systems for machines with integrated energy recovery circuit
CATERPILLAR INC10 citations83
US9290912B2Mar 22, 2016
Energy recovery system having integrated boom/swing circuits
CATERPILLAR INC15 citations83
US9091286B2Jul 28, 2015
Hydraulic control system having electronic flow limiting
CATERPILLAR INC7 citations83
US9618014B2Apr 11, 2017
Implement system having hydraulic start assist
CATERPILLAR INC12 citations82
US9086061B2Jul 21, 2015
Energy recovery hydraulic system
CATERPILLAR INC14 citations82
US9829014B2Nov 28, 2017
Hydraulic system including independent metering valve with flowsharing
CATERPILLAR INC17 citations80
US10337532B2Jul 2, 2019
Split spool valve
CATERPILLAR INC7 citations79
US7735517B2Jun 15, 2010
Rotary-actuated electro-hydraulic valve
CATERPILLAR INC17 citations77
US9556591B2Jan 31, 2017
Hydraulic system recovering swing kinetic and boom potential energy
CATERPILLAR INC5 citations73
US9458604B2Oct 4, 2016
Hybrid apparatus and method for hydraulic systems
CATERPILLAR INC5 citations73
US9290911B2Mar 22, 2016
Energy recovery system for hydraulic machine
CATERPILLAR INC6 citations72
US7302797B2Dec 4, 2007
Hydraulic system having a post-pressure compensator
CATERPILLAR INC7 citations72
US9951795B2Apr 24, 2018
Integration of swing energy recovery and engine anti-idling systems
CATERPILLAR INC5 citations71
US9745940B2Aug 29, 2017
Machine having hydraulic start assist system
CATERPILLAR INC5 citations71
US9261118B2Feb 16, 2016
Boom cylinder dig flow regeneration
CATERPILLAR INC4 citations68
US11430319B1Aug 30, 2022
Cavitation detection system
CATERPILLAR INC4 citations64
US12286986B2Apr 29, 2025
Method for monitoring operation of a hydraulic system
CATERPILLAR INC0 citations62
US9388829B2Jul 12, 2016
Hydraulic control system having swing motor energy recovery
CATERPILLAR INC2 citations61
US7905089B2Mar 15, 2011
Actuator control system implementing adaptive flow control
CATERPILLAR INC6 citations60
US12534879B1Jan 27, 2026
Hydraulic pump with de-stroke control
CATERPILLAR INC0 citations56
US9328744B2May 3, 2016
Hydraulic control system having swing energy recovery
CATERPILLAR INC1 citations51
US11719265B2Aug 8, 2023
Cooler bypass valve assembly for hydraulic system return circuit
CATERPILLAR INC1 citations50
US9897120B2Feb 20, 2018
Hydraulic system having energy recovery
CATERPILLAR INC0 citations48
US11572925B2Feb 7, 2023
Brake slack adjuster having sensing piston with orifice and systems, components, and methods thereof
CATERPILLAR INC0 citations45
CATERPILLAR MITSUBISHI LTD
7 patentsUS7269944B2Sep 18, 2007
Hydraulic system for recovering potential energy
CATERPILLAR MITSUBISHI LTD52 citations92
US7251935B2Aug 7, 2007
Independent metering valve control system and method
CATERPILLAR MITSUBISHI LTD20 citations92
US7121189B2Oct 17, 2006
Electronically and hydraulically-actuated drain value
CATERPILLAR MITSUBISHI LTD22 citations89
US7204084B2Apr 17, 2007
Hydraulic system having a pressure compensator
CATERPILLAR MITSUBISHI LTD11 citations84
US7194856B2Mar 27, 2007
Hydraulic system having IMV ride control configuration
CATERPILLAR MITSUBISHI LTD19 citations83
US7204185B2Apr 17, 2007
Hydraulic system having a pressure compensator
CATERPILLAR MITSUBISHI LTD16 citations78
US7243493B2Jul 17, 2007
Valve gradually communicating a pressure signal
CATERPILLAR MITSUBISHI LTD4 citations59
ZHANG JIAO
4 patentsUS9279236B2Mar 8, 2016
Electro-hydraulic system for recovering and reusing potential energy
ZHANG JIAO26 citations92
US8776511B2Jul 15, 2014
Energy recovery system having accumulator and variable relief
ZHANG JIAO13 citations83
US8850806B2Oct 7, 2014
Hydraulic control system having swing motor energy recovery
ZHANG JIAO19 citations82
US9068575B2Jun 30, 2015
Hydraulic control system having swing motor energy recovery
ZHANG JIAO5 citations71
MA PENGFEI
3 patentsCATERPILLAR GLOBAL MINING LLC
2 patentsCHEN DAYAO
2 patentsHUAWEI TECH CO LTD
2 patentsEMPIRE TECHNOLOGY DEV LLC
1 patentKERCKHOVE PHILIPPE VANDE
1 patentGUANGZHOU AOSONG ELECTRONIC CO LTD
1 patentShowing the top 50 of 55 patents by PatentIndex Score.