US3560775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary magnetoelectric device
Assignee: ELEKTRO MOTOREN AG
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Filing: 1966-03-10
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Granted: 1971-02-02
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Expires: 1986-03-10
Abstract
Abstract A rotary magnetoelectric device of small diameter and great length having a stator assembly comprising at least two pairs of U-shaped members. The outer legs of the U-shaped members are in abutment whereas the inner legs are spaced to provide a central air gap, thus forming at least two pairs of stator poles. A cylindrical permanent magnet rotor is disposed between the stator poles. A cylindrical coil provides an alternating field to the stator poles.
Inventors
- 👤 Otto Welter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:25
CPC Classifications
H; H02; H02K; H02K33/00; H02K33/16; H02K1/00; H02K1/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
109 words
A rotary magnetoelectric device comprising in combination: a stator assembly and a rotor; the stator assembly including at least one pair of poles, each pole-pair being part of an equal number of pairs of longitudinally aligned U-shaped members, the outer legs of which are in abutment, while the inner legs forming the poles are spaced to provide an axial air gap centrally of the device; the rotor being a permanent magnet rotor positioned for rotary motion between said stator poles and spaced therefrom by a narrow radial air gap; the device further including a coil adapted to create, and interact with, an alternating magnetic field on said stator poles.
Claim 2
Dependent Claim
109 words
A rotary magnetoelectric device comprising in combination: a stator assembly and a rotor; the stator assembly including at least one pair of poles, each pole-pair being part of an equal number of pairs of longitudinally aligned U-shaped members, the outer legs of which are in abutment, while the inner legs forming the poles are spaced to provide an axial air gap centrally of the device; the rotor being a permanent magnet rotor positioned for rotary motion between said stator poles and spaced therefrom by a narrow radial air gap; the device further including a coil adapted to create, and interact with, an alternating magnetic field on said stator poles.
Claim 3
Dependent Claim
17 words
A device in accordance with claim 1, wherein said stator pole members comprise magnetic sheet metal stampings.
Claim 4
Dependent Claim
18 words
A device in accordance with claim 1, wherein said stator poles are curved to cooperate with said rotor.
Claim 5
Dependent Claim
23 words
A device in accordance with claim 1, wherein the ratio of the length to the diameter of the rotor is at least 5.
Claim 6
Dependent Claim
23 words
A device in accordance with claim 1, wherein the ratio of the length to the diameter of the rotor is at least 10.
Claim 7
Dependent Claim
19 words
A device in accordance with claim 1, wherein the rotor is cylindrical, having at least two radially magnetized poles.
Claim 8
Dependent Claim
40 words
A device in accordance with claim 1, wherein the rotor has a profile derived from a cylinder, having at least two radially magnetized poles, with peripheral profile portions between the poles removed from the cylinder to reduce its rotary inertia.
Claim 9
Dependent Claim
18 words
A device in accordance with claim 1, wherein said stator assembly includes at least two pairs of poles.
Claim 10
Dependent Claim
66 words
A device in accordance with claim 8, wherein said rotor is subdivided magnetically into two length portions, each rotor portion being radially magnetized to form a magnetic pattern in the form of a succession of circumferential pole-pairs equal in number with the number of pole-pairs in the stator assembly, the pole-pairs of one rotor portion being circumferentially offset from the pole-pairs of the other rotor portion.
Claim 11
Dependent Claim
26 words
A device in accordance with claim 9, wherein the circumferential offset between the pole-pairs of the two rotor portions equals the circumferential width of one pole.
Claim 12
Dependent Claim
14 words
A device in accordance with claim 1, wherein said coil surrounds an insulating tube.
Claim 13
Dependent Claim
23 words
A device in accordance with claim 1, wherein said insulating tube is provided with inside grooves equal in number to the stator poles.
Claim 14
Dependent Claim
20 words
A device in accordance with claim 1, wherein said grooves receive said inner legs of said U-shaped stator pole members.
Claim 15
Dependent Claim
15 words
A device in accordance with claim 1, wherein said coil is a cylindrical multilayer coil.
Claim 16
Dependent Claim
25 words
A device in accordance with claim 1, wherein said coil is cylindrical and positioned radially between said inner and outer legs of the U-shaped members.
Claim 17
Dependent Claim
28 words
A device in accordance with claim 1, further comprising an outer metal cylinder surrounding the outer legs of said U-shaped member so as to form a magnetic yoke.
Claim 18
Dependent Claim
23 words
A device in accordance with claim 16, wherein said coil is between said inner and outer legs of said U-shaped stator pole members.
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |