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DUNJIAN HEAVY IND MFG CO LTD

Overview
  • Total Patents
    21
About

DUNJIAN HEAVY IND MFG CO LTD has a total of 21 patent applications. Its first patent ever was published in 2011. It filed its patents most often in China. Its main competitors in its focus markets machine tools, machines and packaging and shipping are HUBEI HONGYI CONSTR CO LTD, HIRAOKA KUNIZOU and MIRAMONDI P.

Patent filings in countries

World map showing DUNJIAN HEAVY IND MFG CO LTDs patent filings in countries
# Country Total Patents
#1 China 21

Patent filings per year

Chart showing DUNJIAN HEAVY IND MFG CO LTDs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Wang Mao 10
#2 Mao Wang 6
#3 Zhang Peng 5
#4 Li Hui 3
#5 Wang Yantao 2
#6 Zhu Lili 2
#7 Wei Shaoliang 2
#8 Xia Tao 2
#9 Li Qiong 2
#10 Wang Haiming 2

Latest patents

Publication Filing date Title
CN104340588A Oil drum moving frame for trolley of shield tunneling machine
CN104339446A Ring width adjusting device of segment mold
CN104338809A Supporting mechanism for rolling large-diameter steel plate
CN104340630A Electromagnet positioning device for pipe piece transfer trolley
CN104339445A Dustproof device for pipe piece mold translation mechanism
CN104249223A Automatic welding device for steel-structure parts of shield machine
CN104249212A Welding method of steel-structure parts of shield machine
CN102720509A Rotary joint of shield machine
CN102606165A Automatic deviation rectifying system for shield machine and operating method of automatic deviation rectifying system
CN102588609A Emergency tail seal device for shield machine and mounting structure thereof
CN103302739A Positioning mechanism of end die and side die of reducer broad sleeper die
CN103302738A Adjustable shock mount for a die
CN103302731A Reducer broad sleeper die
CN102536257A Double independent driving system for shield machine
CN102536256A Cutter head structure of hard rock shield machine, used for mounting fixed hob with square bearing seats
CN102392655A Hard rock shield machine cutter head structure with square axle bed fixed type hobbing cutter installed
CN102400692A Rotary mechanism of tube sheet splicing machine for shield machine
CN102489927A Rotary table for welding of shield tunneling machine
CN103086252A Large-tonnage duct piece vacuum suspender power-off safety device
CN103086274A Large-tonnage duct piece vacuum suspender pneumatic control system