US3762839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump with magnetic drive
Assignee: Individual
•
Filing: 1971-05-17
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Granted: 1973-10-02
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Expires: 1991-05-17
Abstract
Abstract In a centrifugal pump in which the impeller and a first pole ring of a magnetic transmission form a unitary structure, the latter is driven through a magnetically permeable separating wall. The magnetic transmission has a second pole ring and, between it and the separating wall, a conductor pole ring comprising a plurality of conductors with the two pole rings being independently arranged for rotation with respect to one another. The two pole rings each have a plurality of pole faces of alternating polarity with one of the pole rings having more pole faces than the other, whereby rotation of one of the pole rings with respect to the other pole ring will be at a predetermined ratio.
Inventors
- 👤 N Laing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:50
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/10; H02K49/104; F; F04; F04D; F04D13/00; F04D13/02; F04D13/021; F04D13/024; F04D13/025; F04D13/026; F04D13/027; F04D29/00; F04D29/04; F04D29/046; F04D29/0467; H02K49/06; H02K5/00; H02K5/04; H02K5/12; H02K5/128
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
138 words
A centrifugal pump for liquids and gases, having a pump chamber and an impeller, a first magnetic pole ring forming a unit with said impeller, a magnetically permeable separating wall which defines the wall of said pump chamber in the region of said first pole ring, and an arrangement for producing a rotating magnetic field for driving said first pole ring, wherein the improvement comprises providing a second pole ring (17) and a third pole ring (120) outside said pump chamber, said second pole ring (17) being separated from said first pole ring (122) by a first magnetic air gap and from said third pole ring (120) by a second magnetic air gap, and a motor driving one of said second pole ring (17) and said third pole ring (120), and said first pole ring (122) comprising magnets.
Claim 2
Dependent Claim
138 words
A centrifugal pump for liquids and gases, having a pump chamber and an impeller, a first magnetic pole ring forming a unit with said impeller, a magnetically permeable separating wall which defines the wall of said pump chamber in the region of said first pole ring, and an arrangement for producing a rotating magnetic field for driving said first pole ring, wherein the improvement comprises providing a second pole ring (17) and a third pole ring (120) outside said pump chamber, said second pole ring (17) being separated from said first pole ring (122) by a first magnetic air gap and from said third pole ring (120) by a second magnetic air gap, and a motor driving one of said second pole ring (17) and said third pole ring (120), and said first pole ring (122) comprising magnets.
Claim 3
Dependent Claim
29 words
A centrifugal pump according to claim 1, wherein said first pole ring is constructed as a segment of a sphere and said second pole ring as a hollow sphere.
Claim 4
Dependent Claim
17 words
A centrifugal pump according to claim 1, wherein said first pole ring (115) has spiral grooves (116).
Claim 5
Dependent Claim
39 words
A centrifugal pump according to claim 1, including a housing for said pump and said motor and wherein said motor and said third pole ring are hermetically separated from said pump chamber in said housing by said separating wall.
Claim 6
Dependent Claim
26 words
A centrifugal pump according to claim 1, wherein said pump impeller (117) is connected to said pole ring (115) with its inlet side facing the lattEr.
Claim 7
Dependent Claim
20 words
A centrifugal pump according to claim 1, wherein said second pole ring is built up from a sheet metal spiral.
Claim 8
Dependent Claim
38 words
A centrifugal pump according to claim 1, wherein said third pole ring (120) defines a hollow cylinder and drives said first pole ring (122) via said second pole ring (17), the latter being assembled from sheet metal discs.
Claim 9
Dependent Claim
52 words
A centrifugal pump according to claim 1, wherein said first pole ring rotates at a higher speed than said third pole ring and the volume of magnetic material of said third pole ring (120) is several times as great as the volume of the magnetic material (122) of said first pole ring.
Claim 10
Dependent Claim
17 words
A centrifugal pump according to claim 1, wherein said spherical separating element (134) consists of non-metallic material.
Claim 11
Dependent Claim
21 words
A centrifugal pump according to claim 1, wherein said second pole ring is constructed in the form of a pressure cylinder.
Claim 12
Dependent Claim
23 words
A centrifugal pump according to claim 1, wherein said first pole ring and said third pole ring have the same number of poles.
Claim 13
Dependent Claim
64 words
A centrifugal pump according to claim 1, wherein said first pole ring is of spherical construction and forms a unit with said impeller said second pole ring defines a conductor ring the centres of the magnetic poles of said first pole ring and of said conductor ring are arranged on the surface of a sphere and said impeller is axially supported at its centre.
Claim 14
Dependent Claim
20 words
A centrifugal pump according to claim 12, wherein said second pole ring (130) is disposed between two concentric spherical shells.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |