Pump body structure and foam pump
AssigneeFoshan Changtuo Packaging Technology Co., Ltd.
InventorsJianwen Zou, Wenqiang Yang
Life of this patent
Estimating the term…
Abstract
A pump body structure includes: an air inlet cylinder, an air inlet cavity being arranged inside the air inlet cylinder, and an air return hole being arranged in a bottom portion of the air inlet cylinder; a liquid inlet cylinder connected to the bottom portion of the air inlet cylinder; a lower cover connected to the bottom portion of the air inlet cylinder, a cavity being defined by the lower cover, an outer side wall of the liquid inlet cylinder and a bottom wall of the air inlet cylinder, and an air return channel being reserved between the lower cover and the liquid inlet cylinder; and an elastic stop valve arranged in the cavity, the elastic stop valve being configured for elastically covering a bottom portion of the air return hole.
Claims9
A pump body structure, comprising:
- an air inlet cylinder, wherein an air inlet cavity is arranged inside the air inlet cylinder, and an air return hole communicating the air inlet cavity with a space below the air inlet cylinder is arranged in a bottom portion of the air inlet cylinder;
- a liquid inlet cylinder connected to the bottom portion of the air inlet cylinder;
- a lower cover connected to the bottom portion of the air inlet cylinder, wherein a cavity is defined by the lower cover, an outer side wall of the liquid inlet cylinder and a bottom wall of the air inlet cylinder, and an air return channel communicating the cavity with a space below the lower cover is reserved between the lower cover and the liquid inlet cylinder;
- and
- an elastic stop valve arranged in the cavity, wherein the elastic stop valve is configured for elastically covering a bottom portion of the air return hole;
- wherein the lower cover is provided with an assembly hole extending vertically across the lower cover, the assembly hole is arranged around the liquid inlet cylinder, the cavity is arranged to surround a periphery of the liquid inlet cylinder for one circle, the air return channel is located between an inner wall of the assembly hole and the outer side wall of the liquid inlet cylinder, the elastic stop valve is arranged around the liquid inlet cylinder along the cavity, and a top portion of the lower cover is arranged to abut against the elastic stop valve.
Dependencies are inferred from the claim text.