Inventor
LUO LIFENG
US46 patents
⚠️ This page may combine multiple inventors who share the name “LUO LIFENG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HYPERTHERM INC
16 patentsUS5695662ADec 9, 1997
Plasma arc cutting process and apparatus using an oxygen-rich gas shield
HYPERTHERM INC167 citations99
US5396043AMar 7, 1995
Plasma arc cutting process and apparatus using an oxygen-rich gas shield
HYPERTHERM INC110 citations98
US5317126AMay 31, 1994
Nozzle and method of operation for a plasma arc torch
HYPERTHERM INC133 citations97
US5601734AFeb 11, 1997
Electrode for a plasma arc torch
HYPERTHERM INC52 citations96
US5591357AJan 7, 1997
Plasma arc cutting process and apparatus using an oxygen-rich gas shield
HYPERTHERM INC71 citations96
US5464962ANov 7, 1995
Electrode for a plasma arc torch
HYPERTHERM INC48 citations96
US5170033ADec 8, 1992
Swirl ring and flow control process for a plasma arc torch
HYPERTHERM INC88 citations96
US5166494ANov 24, 1992
Process and apparatus for reducing electrode wear in a plasma arc torch
HYPERTHERM INC85 citations96
US5070227ADec 3, 1991
Proceses and apparatus for reducing electrode wear in a plasma arc torch
HYPERTHERM INC82 citations96
US5653896AAug 5, 1997
Process for high quality plasma arc and laser cutting of stainless steel and aluminum
HYPERTHERM INC39 citations95
US5380976AJan 10, 1995
Process for high quality plasma arc and laser cutting of stainless steel and aluminum
HYPERTHERM INC93 citations95
US5414236AMay 9, 1995
Process for high quality plasma arc cutting of stainless steel and aluminum
HYPERTHERM INC28 citations93
US5548097AAug 20, 1996
Plasma arc cutting torch ignition circuit and method providing a forced arc transfer function
HYPERTHERM INC30 citations92
US5310988AMay 10, 1994
Electrode for high current density plasma arc torch
HYPERTHERM INC32 citations90
US5416297AMay 16, 1995
Plasma arc torch ignition circuit and method
HYPERTHERM INC40 citations89
US5558786ASep 24, 1996
Process for high quality plasma arc and laser cutting of stainless steel and aluminum
HYPERTHERM INC16 citations81
LINCOLN GLOBAL INC
12 patentsUS6055161AApr 25, 2000
Switching type power supply for arc welding
LINCOLN GLOBAL INC59 citations96
US5965040AOct 12, 1999
Plasma arc torch
LINCOLN GLOBAL INC67 citations95
US9855620B2Jan 2, 2018
Welding system and method of welding
LINCOLN GLOBAL INC16 citations92
US7796005B2Sep 14, 2010
Power source for plasma device
LINCOLN GLOBAL INC23 citations92
US6705563B2Mar 16, 2004
Open shipyard wire feeder
LINCOLN GLOBAL INC49 citations92
US6268587B1Jul 31, 2001
Current feedback device for electric arc welder
LINCOLN GLOBAL INC22 citations89
US7573000B2Aug 11, 2009
Power source for plasma device
LINCOLN GLOBAL INC12 citations84
US10744587B2Aug 18, 2020
Welding system and method of welding
LINCOLN GLOBAL INC2 citations72
US6995337B2Feb 7, 2006
Power source with saturable reactor
LINCOLN GLOBAL INC9 citations68
US11673202B2Jun 13, 2023
Welding system and method of welding
LINCOLN GLOBAL INC0 citations62
US10668551B2Jun 2, 2020
High reliability modular welding power supply system
LINCOLN GLOBAL INC1 citations62
US10857613B2Dec 8, 2020
System and method for real-time computation and reporting of welding machine performance and metrics
LINCOLN GLOBAL INC0 citations48
LUO LIFENG
4 patentsUSD1062621SFeb 18, 2025
Wireless charger
LUO LIFENG3 citations73
US10280972B2May 7, 2019
Groove-type dynamic pressure gas radial bearing
LUO LIFENG0 citations51
US10274007B2Apr 30, 2019
Hybrid dynamic pressure gas thrust bearing
LUO LIFENG0 citations40
US10228015B2Mar 12, 2019
Hybrid dynamic pressure gas radial bearing
LUO LIFENG0 citations40