US3581132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating electrical machine
Assignee: Individual
•
Filing: 1969-04-03
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Granted: 1971-05-25
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Expires: 1989-04-03
Abstract
Abstract In a rotating electrical machine having a pole ring having poles which extend towards the airgap between the stator and the rotor and which are formed with winding slots extending parallel to the rotor axis, the winding extending radially through the winding slots, the pole surfaces near the airgap are larger than the smallest cross sections of the poles. The armatures of such rotating machines can in known manner be formed by spirally coiled strip. A rotating electrical machine of this kind makes a very good pump motor of the kind wherein a partition provides a sealingtight separation between the driven element and the driving element.
Inventors
- 👤 Nikolaus Laing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:13
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/16; H02K1/00; H02K1/06; H02K1/12; H02K1/16; H02K5/00; H02K5/04; H02K5/12; H02K5/128; H02K5/1282; H02K2201/00; H02K2201/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
101 words
A rotating eleCtrical machine having two axially opposite rotatable members with one said member comprising an armature and the other said member a rotor with an airgap therebetween wherein at least one said member has a soft magnetic core and a winding, the core having poles which extend towards the airgap between the members and which bound winding slots extending parallel to the rotor axis, and wherein the windings extend in radial planes through the winding slots characterized in that surface of each pole which is near the airgap is larger than the smallest cross section of the particular pole concerned.
Claim 2
Dependent Claim
101 words
A rotating eleCtrical machine having two axially opposite rotatable members with one said member comprising an armature and the other said member a rotor with an airgap therebetween wherein at least one said member has a soft magnetic core and a winding, the core having poles which extend towards the airgap between the members and which bound winding slots extending parallel to the rotor axis, and wherein the windings extend in radial planes through the winding slots characterized in that surface of each pole which is near the airgap is larger than the smallest cross section of the particular pole concerned.
Claim 3
Dependent Claim
37 words
A rotating electrical machine as set forth in claim 1, characterized in that the poles are cylindrical members, and the pole surfaces which are near the airgap include with the cylinder axes angles other than 90* .
Claim 4
Dependent Claim
24 words
A rotating electrical machine as set forth in claim 2, characterized in that the pole surfaces which are near the airgap are curved surfaces.
Claim 5
Dependent Claim
32 words
A rotating electrical machine as set forth in claim 3, characterized in that the curved surfaces (6) are portions of a spherical surface whose center (0) is disposed on the rotor axis.
Claim 6
Dependent Claim
34 words
A rotating electrical machine as set forth in claim 3, characterized in that the curved surfaces (6'''' , 6'''''' ) are disposed in cone surfaces whose center is disposed on the rotor axis (7).
Claim 7
Dependent Claim
38 words
A rotating electrical machine as set forth in claim 3, characterized in that the curved surfaces (6'' ) have a number of portions, each of which is a section of a surface of rotation around the rotor axis.
Claim 8
Dependent Claim
34 words
An armature for an induction machine as set forth in claim 1, characterized in that the iron body is made of sintered iron segments (45) held together by the cage winding (41, 43, 44).
Claim 9
Dependent Claim
37 words
An armature for an induction machine as set forth in claim 1, characterized in that the armature is made of sintered iron and is formed along generatrices with slots (61) receiving rods (67) of a cage winding.
Claim 10
Dependent Claim
28 words
An armature for an induction machine as set forth in claim 8, characterized in that the cage winding is a stamping (63) in shape resembling a spherical cap.
Claim 11
Dependent Claim
52 words
An armature for an induction machine as set forth in claim 9, characterized in that the cage winding has a first magnetic shunt ring (50), whose outer diameter is less than the axis-to-bars distance, and a second magnetic shunt ring (51) is in inner diameter greater than the armature iron core (60).
Claim 12
Dependent Claim
22 words
An armature for an induction machine as set forth in claim 1, characterized in that it comprises a spirally coiled strip (1).
Claim 13
Dependent Claim
20 words
An armature for an induction machine as set forth in claim 1, characterized in that it comprises grooved soft-iron rings.
Claim 14
Dependent Claim
25 words
An armature for an induction machine as set forth in claim 12, characterized in that the rings are combined from half shells or third shells.
Claim 15
Dependent Claim
33 words
An induction motor devised as drive for a pump as set forth in claim 1, characterized in that a part spherical partition (65) rigidly connected to the stator is disposed in the airgap.
Claim 16
Dependent Claim
43 words
An induction motor devised as drive for a pump as set forth in claim 18, characterized in that the airgap is disposed on the surface of a sphere whose airgap coincides with the center of a support sphere (9) for the pump rotor.
Claim 17
Dependent Claim
28 words
An induction motor devised as drive for a pump as set forth in claim 1, characterized in that the pump rotor (10) has provision for limited axial displacement.
Claim 18
Dependent Claim
35 words
An induction motor devised as drive for a pump as set forth in claim 18, characterized in that the partition (65) between the stator and the rotor is made of a very thin ferromagnetic material.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |