Inventor
YAN CHENGQUN
CN4 patents
Patents
4 patentsUS10464126B2Nov 5, 2019
Pressure control system and means for pressure pouring of cast steel wheels
AMSTED RAIL CO INC0 citations32
US10429007B2Oct 1, 2019
Gas pressure tank structure
AMSTED RAIL CO INC0 citations30
US10252330B2Apr 9, 2019
Pouring metallic plug stick clamping mechanism for cast steel wheels
AMSTED RAIL CO INC0 citations30
US10294696B2May 21, 2019
Locking mechanism for a tank body and a tank cover of a pressure tank
AMSTED RAIL CO INC0 citations29