Learn more

HUNAN OIL PUMP CO LTD

Overview
  • Total Patents
    275
  • GoodIP Patent Rank
    6,454
  • Filing trend
    ⇧ 25.0%
About

HUNAN OIL PUMP CO LTD has a total of 275 patent applications. It increased the IP activity by 25.0%. Its first patent ever was published in 2008. It filed its patents most often in China, WIPO (World Intellectual Property Organization) and EPO (European Patent Office). Its main competitors in its focus markets engines, pumps and turbines and mechanical elements are WOODHOUSE TIMOTHY CHARLES, DANA AUTOMOTIVE LTD and HANS JENSEN LUBRICATORS A.

Patent filings in countries

World map showing HUNAN OIL PUMP CO LTDs patent filings in countries

Patent filings per year

Chart showing HUNAN OIL PUMP CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Xu Zhongqiu 252
#2 Liu Guangming 128
#3 She Xiaomei 111
#4 Liu Tiefei 39
#5 Li Weishun 24
#6 Zhongqiu Xu 23
#7 Wei Biao 22
#8 Yang Bo 20
#9 Tang Yehe 19
#10 Song Shanguo 17

Latest patents

Publication Filing date Title
CN112228760A Variable displacement rotor pump with simplified structure
CN112228181A Full variable control system based on rotor pump
CN112228180A Two-stage variable control system based on rotor pump
CN112196993A Electronic oil pump for steel belt pre-tightening of CVT (continuously variable transmission)
CN112177706A Plunger type pressure limiting valve
CN112283101A Variable displacement oil pump with accurate slider positioning
CN112160813A Oil pump integrated with switch type chain lubricating nozzle
CN112112704A Can vibration/noise reduction's impeller pump
CN112065709A Oil way sealing structure for oil pump body or pump cover
CN112032037A Oil pump body and oil pump of easy processing
CN112112798A Oil pump capable of damping and reducing noise
CN112065530A Inner and outer rotors capable of damping and reducing noise and oil pump
CN112127964A External aluminum oil pump capable of preventing idler shaft from loosening
CN112096605A Rotor pump easy to assemble
CN112031889A Oil pump and safety valve for oil pump
CN112096941A Oil pump pressure limiting valve capable of improving spring installation precision
CN111963271A One-stage variable pump control system with simplified structure
CN112096938A Oil pump pressure limiting valve capable of reducing plunger eccentric wear
CN112081741A Method for applying pump body and pump cover to oil pumps with different flow specifications
CN112050064A Large-flow double-section pump