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:
Jan. 28, 2025
Filed:
Sep. 10, 2021
Beijing Aerospace Petrochemical Technology and Equipment Engineering Corporation Limited, Beijing, CN;
Xiaoxia Wei, Beijing, CN;
Xianyu Bao, Beijing, CN;
Na Li, Beijing, CN;
Yixiao Wang, Beijing, CN;
Shangang Guo, Beijing, CN;
Ling Bian, Beijing, CN;
Honghui Yu, Beijing, CN;
Peng Shuai, Beijing, CN;
Xiaofeng Li, Beijing, CN;
Xuebin Wang, Beijing, CN;
Dianjing Chen, Beijing, CN;
Xuli Tang, Beijing, CN;
Abstract
A check valve for low pressure operating conditions includes: a valve cover, a valve body, and an upper diaphragm between the body and the cover. A first pressure cavity is provided on a lower surface of the valve cover and used for accommodating a backward direction medium, a second pressure cavity is machined on an upper surface of the valve body, within which an inflow passage and an outflow passage are provided, an inflow hole is machined from an inner wall of the inflow passage to a bottom face of the second pressure cavity, and a medium enters into the second pressure cavity from the inflow passage via the inflow hole, and applies upward pressure on the upper diaphragm. A backflow channel in communication with the first pressure cavity is machined on a side wall of the outflow passage.