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US 10,208,869 B2Granted
Multi-piece canister assembly for magnetically coupled fluid handling devices
AssigneePeopleflo Manufacturing, Inc.
InventorsWilliam R. Blankemeier, Clark J. Shafer, Daniel Turner, Kris Malorny
Life of this patent
Estimating the term…
Abstract
The present disclosure provides a multi-piece containment canister assembly for use in magnetically coupled fluid handling devices such as rotary pumps, mixers, flowmeters or valves. The canister assembly includes a generally tubular single-piece body and an end cap that are sealingly fastened together to form a generally cup-shaped canister. The canister body may be made of strong, non-conductive or low conductive materials, such that it greatly reduces eddy currents. The generally tubular shape of the canister body is easier, and therefore less costly to manufacture than typical cup-shaped canisters.
Claims30
A magnetically driven fluid handling device comprising:
- a stationary casing having a front portion, a rear portion, a discharge port, and an inlet port;
- a rotatable rotor assembly having a plurality of magnet segments;
- a rotatable drive magnet assembly having a plurality of magnet segments in axial alignment with the magnet segments of the rotor assembly;
- a stationary canister assembly of multi-piece construction further comprising an end cap and a body that is generally tubular, with the body being disposed within a radial gap between the magnet segments of the rotor assembly and the magnet segments of the drive magnet assembly;
- wherein the body has a central axis and further comprises a central cavity that is open at opposed first and second ends, with a dimension RMAX defined by a radial distance from the central axis to a point on the body farthest away from the central axis, and a dimension RMIN defined by a radial distance from the central axis to a point on the body nearest to the central axis, wherein the dimensions RMIN and RMAX have a ratio of RMIN to RMAX that is at least 0.5, and the body is a single piece;
- and
- wherein the body further comprises a flange at the first end, the flange at the first end of the body extends inward and further comprises threads, the end cap further comprises threads that cooperate with the threads of the flange at the first end of the body, and the end cap is fastened to and sealingly closes the central cavity at the flange at the first end of the body via engagement of the respective threads of the flange at the first end of the body and the end cap, and wherein the canister assembly is sealingly attached to the casing at the second end of the body, and the canister assembly separates a fluid chamber within the casing from the drive magnet assembly.
4 more elements
A canister assembly for a magnetically driven fluid handling device, said canister assembly being of multi-piece construction and comprising:
- an end cap and a body that is generally tubular;
- the body having a central axis and a central cavity that is open at opposed first and second ends, with a dimension RMAX defined by a radial distance from the central axis to a point on the body farthest away from the central axis, and a dimension RMIN defined by a radial distance from the central axis to a point on the body nearest to the central axis, wherein the dimensions RMIN and RMAX have a ratio of RMIN to RMAX that is at least 0.5, and the body is a single piece;
- and
- wherein the body further comprises a flange at the first end, the flange at the first end of the body extends inward and further comprises threads, the end cap further comprises threads that cooperate with the threads of the flange at the first end of the body, and the end cap is fastened to and sealingly closes the central cavity at the flange at the first end of the body via engagement of the respective threads of the flange at the first end of the body and the end cap.
1 more element
A magnetically driven fluid handling device comprising:
- a stationary casing having a front portion, a rear portion, a discharge port, and an inlet port;
- a rotatable rotor assembly having a plurality of magnet segments;
- a rotatable drive magnet assembly having a plurality of magnet segments in axial alignment with the magnet segments of the rotor assembly;
- a stationary canister assembly of multi-piece construction further comprising an end cap and a body that is generally tubular, with the body being disposed within a radial gap between the magnet segments of the rotor assembly and the magnet segments of the drive magnet assembly, and the end cap further comprising a bearing surface for the rotor assembly;
- wherein the body has a central axis and further comprises a central cavity that is open at opposed first and second ends, with a dimension RMAX defined by a radial distance from the central axis to a point on the body farthest away from the central axis, and a dimension RMIN defined by a radial distance from the central axis to a point on the body nearest to the central axis, wherein the dimensions RMIN and RMAX have a ratio of RMIN to RMAX that is at least 0.5, and the body is constructed of a single piece of material;
- and
- wherein the body further comprises a flange at the first end, the flange at the first end of the body extends inward and the end cap is fastened to and sealingly closes the central cavity at the flange at the first end of the body, and wherein the canister assembly is sealingly attached to the casing at the second end of the body, and the canister assembly separates a fluid chamber within the casing from the drive magnet assembly.
4 more elements
Dependencies are inferred from the claim text.