公开(公告)号：US20240066539A1

公开(公告)日：2024-02-29

申请号：US18280264

申请日：2021-12-20

Applicant: YONWOO CO., LTD.

Inventor： Seong Ung CHOE ,  Tae Yong KIM

IPC: B05B11/10

CPC classification number: B05B11/105 ,  B05B11/1077 ,  B05B11/1001

Abstract: A pump assembly includes: a cylinder open on top and bottom thereof and having a hollow portion formed therein and a first wing protruding outward from the outer peripheral surface of top thereof; a sealing part having at least a portion thereof inserted into the cylinder to at least partly seal the upper peripheral surface of the cylinder and a second wing protruding outward from the outer peripheral surface of the top thereof; a stem moving downward by means of an external force to vary internal pressure of the cylinder; an elastic member disposed between the stem and the sealing part to apply an elastic force to the stem from the sealing part; and a housing coupled to the cylinder in such a way to surround the outer peripheral surface of the upper portion of the cylinder and adapted to detachably couple the pump assembly to a container.