Patent ID: 6609901
Filing Date: 2003-08-26
Classification: F04D

Abstract:
A Closure system for pump casings of plastic immersion pumps, the system comprisinga substantially cylindrical casing wall; a detachable casing cover, and a locking ring for locking the casing cover in place over an open end of the cylindrical casing, the locking ring being arranged in a mounted state thereof, on the outside of the casing cover and is inserted into an annular groove in the casing wall, wherein the casing cover is provided on an outer side thereof with at least two ribs which are arranged in a spoke-like manner and each having an outer projection defining a groove radially accessible from the outside, and wherein the locking ring is provided with a number of radially inward projecting tabs corresponding to a number of ribs provided on the casing cover, the locking ring being movable into a locking position by rotation on the casing cover, and the tabs being dimensioned and arranged in such a way that, in the locking position, the tabs are each inserted with a tight fit into a respective groove of the ribs.