Xiangwei Zeng

Follow

Person

Sichuan Province, CN

People

Patents Grantslast 30 patents

Information Patent Grant
Driving and adjusting device of passive shuttle-type shut-off valve
- Patent number 8,740,176
- Issue date Jun 3, 2014
- Xiangwei Zeng
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Self-operated protection device for pipeline
- Patent number 6,895,994
- Issue date May 24, 2005
- Xiangwei Zeng
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Fluid-controlled valve for pipeline pig
- Patent number 6,854,478
- Issue date Feb 15, 2005
- Xiangwei Zeng
- B08 - CLEANING
Information Patent Grant
Adjustable differential flow shuttle valve
- Patent number 4,872,475
- Issue date Oct 10, 1989
- Zeng Xiang-Wei
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
Driving and Adjusting Device of Passive Shuttle-Type Shut-Off Valve
- Publication number 20130207011
- Publication date Aug 15, 2013
- WINJET HIGH-TECH INVESTMENT CO., LTD. (BEIJING)
- Xiangwei Zeng
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Application
Adjustable Differential Flow Shuttle Valve Control System
- Publication number 20070144340
- Publication date Jun 28, 2007
- Xiangwei Zeng
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Application
Self-operated protection device for pipeline
- Publication number 20050022873
- Publication date Feb 3, 2005
- Xiangwei Zeng
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
Protection device in event of pipe rupture
- Publication number 20040031523
- Publication date Feb 19, 2004
- Xiangwei Zeng
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...