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:
Dec. 28, 2021
Filed:
Dec. 13, 2018
Gree Electric Appliances, Inc. of Zhuhai, Guangdong, CN;
Huijun Wei, Zhuhai, CN;
Jia Xu, Zhuhai, CN;
Zhongcheng Du, Zhuhai, CN;
Sen Yang, Zhuhai, CN;
Zhi Li, Zhuhai, CN;
Shebing Liang, Zhuhai, CN;
Liping Ren, Zhuhai, CN;
Rongting Zhang, Zhuhai, CN;
Zhengliang Shi, Zhuhai, CN;
Xixing Liu, Zhuhai, CN;
GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI, Guangdong, CN;
Abstract
A pump assembly, fluid machinery, and a heat exchange device. The pump assembly includes: a lower flange; a lower friction-reducing ring; a cylinder, the lower friction-reducing ring being disposed inside the cylinder, and the lower flange being disposed below the cylinder; and a piston assembly arranged inside the cylinder and includes a piston sleeve and a piston slidably arranged inside the piston sleeve. The lower friction-reducing ring has a central hole. A position-limiting protrusion is disposed on a surface of the piston sleeve, which faces the lower flange. The limiting protrusion extends into the central hole of the lower friction-reducing ring, fits and is limited by the lower flange.