ALEXANDRIA, Va., July 16 -- United States Patent no. 12,667,859, issued on June 30, was assigned to MAJESTY HOLDINGS Co. LTD. (Zhongshan, China).
"All-plastic pressing pump" was invented by Peihui Liang (Guangdong, China), Maoyong Zhu (Guangdong, China), Yonglei Zhang (Guangdong, China) and Jinkao Liang (Guangdong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed in the invention is an all-plastic pressing pump comprising: an actuator, an insert, a housing, a container cap, a piston guide, a pump ball, a spring, and a protective cover, made of plastic. The lower end of the piston guide is provided with a slidable sealing part that is inserted into the housing and slidably and sealing connected ...