The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 12, 2022
Filed:
May. 04, 2018
Crrc Qingdao Sifang Co., Ltd., Shandong, CN;
Shuanbao Yao, Shandong, CN;
Dawei Chen, Shandong, CN;
Conghui Zhang, Shandong, CN;
Peng Lin, Shandong, CN;
Xin Jiang, Shandong, CN;
Yunfeng Li, Shandong, CN;
Shaoqing Liu, Shandong, CN;
Sansan Ding, Shandong, CN;
CRRC QINGDAO SIFANG CO., LTD., Shangdong, CN;
Abstract
A waste exhaust ventilation door automatic control device comprises a core body (), an inner door body () and an outer door body (); wherein the core body is fixed on a ventilation opening of the waste exhaust ventilation door, a top of the outer door body is movably hinged on an outer side of the core body, and a bottom of the inner door body is movably hinged on an inner side of the core body; when there is no pressure fluctuation outside the core body, the outer door body and inner door body will open, and when there is pressure fluctuation outside the core body, the outer door body and/or the inner door body will be closed automatically due to a pressure difference between inside and outside the core body. A vehicle body comprising the waste exhaust ventilation door automatic control device is also provided.