Filtration device combined with self-priming pump

Abstract

The present invention provides a filtration device combined with self-priming pump in which a filter replacement work is easy and safe, and removal of air inside of a pump and priming are not necessary. And this filtration device is characterized to provide with a pump unit, which is a valveless-construction self-priming pump without a check valve, including a suction port, a suction chamber, an impeller, a self-priming chamber, a discharge port from an upstream of a channel to a downstream thereof in this order, the suction port and the discharge port being arranged above the level of the suction chamber and the impeller, and a self-priming chamber arranged above the level of the suction port and the discharge port; a filtration unit arranged on a channel between the self-priming chamber and the discharge port and above the level of the self-priming chamber; and a filter arranged inside of the filtration unit and above the level of residual liquid inside of the pump unit at the time of suspending of the pump unit.

Dependencies are inferred from the claim text.