Pump assembly

Abstract

Abstract A pump assembly for storing and discharging a liquid such as a chemical solution includes a substantially cylindrical container (1) for storing the liquid therein, a pump (2) mounted on one end of the container (1) and having suction port (17) for drawing the liquid from the container and an outlet port for discharging the liquid, and a gasket (4) slidably inserted in the opposite end of the container (1) in contact with the liquid stored in the container (1), for sealing the liquid in the container (1),the gasket (4) being slidable toward the pump (2) when the liquid stored in the container (1) is reduced by the pump (2), A slanted portion (7) is disposed in said one end of the container (1) and has a slanted surface (8) extending continuously from an inner peripheral surface of the container (1) and converging away from the gasket (4), The suction port (17) of the pump (2) communicates with the interior space of the container (1) substantially at a converging end of the slanted surface (8). Any trapped air is collected between the slanted surface (8) and the liquid contained in the container (1), and can be discharged from the container (1) by the pump (2) before the liquid is discharged from the container (1) by the pump (2).

Inventors

• 👤 Koichi Sugita

Bibliographic Details