Magnetically coupled pump structure

Claim 2

A tank-mounting bell with combination driving motor and magnetically-coupled pump driven thereby, said bell comprising a molded plastics material shell of cylindrical form having one end closed by an integrally conformed end wall and an opposite open end; a plurality of post configurations disposed in angularly spaced relation in integral conformation with said material about the internal periphery of the shell cavity, certain of said post formations having end portions integrally terminating in said end wall, and others of said post formations having conterminous end portions disposed within the cavity away from said end wall toward said open end and constituting mounting lands; a motor mounting plate member seated against said lands and secured to the appertaining post formations; a pump driving motor having an end portion, at least, confronting and secured to said plate member with a predetermined substantial part, at least, of the motor body disposed within said cavity; a tank-mounting flange formation subtending said open end of the shell and constituting an integral configuration with the material thereof; a pump having a body engaged with the external side of said end wall and secured thereto by means engaging into said certain post formations, said pump being adapted to be drivingly coupled with said motor by magnetic means which does not perforately penetrate said bell material.

Claim 3

The construction of claim 1 wherein said tank-mounting flange formation extends radially outwardly of the shell and is adapted to seat against wall portions of a tank subjacent to the margins of a hole through which the bell is entered into the tank to a limit determined by engagement of said flange formation with said subjacent wall portions, and thE bell is secured in sealed engagement with said subjacent wall portions by fastening means engaging both the flange and said last-mentioned tank wall portions.

Claim 4

A motor-mounting bell for use with a magnetically-coupled rotary pump of the type comprising a pump housing having a rotary impeller and coaxially rotatable driven magnet situated in a salient magnet chamber of the housing structure such that an annular outer driving magnet can be rotated about the outside periphery of the magnet chamber, improvements consisting in the combination with a pump housing of the aforesaid type having an opening through which the driven magnet of the impeller is a motor-mounting bell structure in the form of a one-piece cup-shaped member with a motor cavity open at one end for entry of a motor unit therein and having a bottom wall closing its opposite end and adapted to fit in sealing attachment to the pump housing in position to close off said opening thereof, said bottom wall having a chamber for the driven magnet which chamber is recessed inwardly of said cavity and impervious to fluid passage from the pump housing and into which the drive magnet projects; and means formed as an integral part of said bell member in the motor cavity thereof for supporting engagement with a motor unit motor therein and including an annular driving magnet rotatable thereby with the axis of rotation of such magnet concentric with the axis of rotation of the driven magnet and the outer wall of said magnet chamber, whereby said annular driving magnet is disposed for rotation about the outer periphery of the outer wall of the magnet chamber as aforesaid, to impart driving torque to the driven magnet therein.

Claim 5

A motor-mounting bell for use with a magnetically-coupled rotary pump of the type comprising a pump housing having a rotary impeller and coaxially rotatable driven magnet situated in a salient magnet chamber of the housing structure such that an annular outer driving magnet can be rotated about the outside periphery of the magnet chamber, improvements consisting in the combination with a pump housing of the aforesaid type having an opening through which the driven magnet of the impeller is a motor-mounting bell structure in the form of a one-piece cup-shaped member with a motor cavity open at one end for entry of a motor unit therein and having a bottom wall closing its opposite end and adapted to fit in sealing attachment to the pump housing in position to close off said opening thereof, said bottom wall having a chamber for the driven magnet which chamber is recessed inwardly of said cavity and impervious to fluid passage from the pump housing and into which the drive magnet projects; and means formed as an integral part of said bell member in the motor cavity thereof for supporting engagement with a motor unit motor therein and including an annular driving magnet rotatable thereby with the axis of rotation of such magnet concentric with the axis of rotation of the driven magnet and the outer wall of said magnet chamber, whereby said annular driving magnet is disposed for rotation about the outer periphery of the outer wall of the magnet chamber as aforesaid, to impart driving torque to the driven magnet therein.