US3741690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separating wall for magnetic machine
Assignee: Individual
•
Filing: 1971-10-12
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Granted: 1973-06-26
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Expires: 1991-10-12
Abstract
Abstract Spherical pole ring magnetic couplings having a spherical bearing adapted to drive a centrifugal pump and resides in a construction in which a spherical hermetic wall separating the poles is so formed as to have a tubular column, surrounded by a concave pole ring. The column supports the bearing, so that overall length of the coupling is reduced.
Inventors
- 👤 N Laing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:08
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/10; H02K49/104; F; F04; F04D; F04D13/00; F04D13/02; F04D13/021; F04D13/024; F04D13/025; H02K5/00; H02K5/04; H02K5/12; H02K5/128
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
A magnetic coupling device having a rotatable outer pole ring with a spherical concave surface, a rotatable inner pole ring with a spherical convex surface, said concave surface partially enclosing said convex surface and being spaced therefrom to form an air gap therebetween and drive means operatively connected to said outer pole ring; the improvement comprising including a hermetic separating wall in said air gap with said wall having a depressed centrally positioned tubular column for receiving said drive means, and spherical bearing means operatively positioned between said inner pole ring and the end of said tubular column for rotatably supporting said inner pole ring with respect to said outer pole ring.
Claim 2
Dependent Claim
112 words
A magnetic coupling device having a rotatable outer pole ring with a spherical concave surface, a rotatable inner pole ring with a spherical convex surface, said concave surface partially enclosing said convex surface and being spaced therefrom to form an air gap therebetween and drive means operatively connected to said outer pole ring; the improvement comprising including a hermetic separating wall in said air gap with said wall having a depressed centrally positioned tubular column for receiving said drive means, and spherical bearing means operatively positioned between said inner pole ring and the end of said tubular column for rotatably supporting said inner pole ring with respect to said outer pole ring.
Claim 3
Dependent Claim
61 words
A magnetic coupling device according to Claim 1 wherein the inner pole ring constitutes part of a subassembly of a pump impeller of a centrifugal pump having a casing, wherein said separating wall is fixedly positioned with respect to said casing, and wherein the center of gravity of said subassembly has its center at substantially the center of said bearing means.
Claim 4
Dependent Claim
46 words
A magnetic coupling device according to claim 2 having in addition a threaded ring on the end of said tubular column for securing said spherical bearing means thereto and having in addition apertures in said impeller by which access to said threaded ring may be obtained.
Claim 5
Dependent Claim
42 words
A magnetic coupling device according to claim 1 having in addition an annular bead in the region of the juncture of said tubular column with the separating wall to accommodate hoop stresses in the wall when the wall is subjected to pressure.
Claim 6
Dependent Claim
20 words
A magnetic coupling device according to claim 1 wherein the tubular column forms a blended continuation with the separating wall.
Claim 7
Dependent Claim
28 words
A magnetic coupling device according to claim 4 having in addition a dish-like element attached to the end of said tubular column for receiving saiD spherical bearing means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |