Patent ID: 6350101
Filing Date: 2002-02-26
Classification: F04D

Abstract:
A barrel pump comprising:a pump rotor; a rotor shaft; a motor for driving said pump rotor via said rotor shaft; said pump rotor being used to pump liquid upward; a tubular pump housing having a ring channel, said liquid being pumped in said ring channel through an inlet opening situated at the bottom end of said tubular pump housing, to an outlet arranged at the top end of the ring channel; a closure body for making the inlet opening closable; said closure body being actuated by relative displacement between rotor shaft and pump housing; said closure body being designed as a cone seal and, in an open position, being arranged at a bottom end of the pump housing in front of the inlet opening; said cone seal being arranged at an end of the rotor shaft, in such a manner that it can rotate freely thereon and in a form-fitting manner, with a slight axial play, in the axial direction, and can be pulled into the closed position by the relative displacement between rotor shaft and pump housing; and said cone seal being of elastic design and having a circumferential groove which, in the closed position, can be latched to an edge of the inlet opening.