Return gas prevention device for drainage pipe

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 11326334
APP PUB NO 20210017754A1
SERIAL NO

16930496

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Abstract

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The present disclosure provides a return gas prevention device for a drainage pipe, belonging to the technical field of drainage pipes. The device realizes two functions of water seal and a check valve simultaneously, as well as prevents gas channeling in a drainage process.

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Patent Owner(s)

Patent OwnerAddress
ZHEJIANG OCEAN UNIVERSITY316022 NO 1 HAIDA SOUTH ROAD LINCHENG STREET DINGHAI DISTRICT ZHOUSHAN ZHEJIANG ZHOUSHAN CITY ZHEJIANG PROVINCE 316022

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Wang, Qin Zhoushan, CN 181 661
Zhang, Chen Zhoushan, CN 745 3564
Zhang, Hai Zhoushan, CN 53 608
Zhang, Yulian Zhoushan, CN 43 805

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