Inventor

CHEN ZHANJI

CN2 patents

Patents

2 patents

US8439330B2May 14, 2013

Stem shoulder seal with double rings and an assembly of independent dual stem seals

XU CHANGXIANG7 citations80

US8864105B2Oct 21, 2014

Ball valve seats and ball valves designed with equilateral triangle section methods

XU CHANGXIANG16 citations75