US4665333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separator for securing magnets
Assignee: IHO Holding GmbH and Co KG
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Filing: 1986-02-27
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Granted: 1987-05-12
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Expires: 2006-02-27
Abstract
Abstract A separator for accurate positioning and easy replacement of magnets in an annular array around a spindle comprises an annularly shaped, elastic separator constructed of plastic materials. The plastic separator includes either cross machine struts that define open bottom recesses or it includes closed bottom recesses for receiving and accurately positioning and retaining the magnets circumferentially around its annular body. The separator applies an initial stress to the magnets to assure precise positioning. Radially directed projections on the body of the separator are shaped to fit into a groove defined in the interior of a motor housing, whereby the magnets carried by the separator are precisely located relative to the motor housing. The Separator-based magnet fixing means are particularly suitable for disk storage spindle applications.
Inventors
- 👤 Edgar Heim
- 👤 Horst Voll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:42
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/04; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2786; H02K1/2787; H02K1/2789; H02K1/279
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
151 words
A separator for positioning magnets in a motor, comprising: the motor having a housing and a groove formed in said housing; the separator having a generally annularly shaped elastic body with an outer circumferential periphery on which the magnets are located, the separator including means for holding the magnets at circumferentially spaced locations around the separator body, the separator including means for applying a resilient force to the magnets to hold the magnets to the separator; the separator body including a first end ring positioned at one end of the separator body, the separator body including at least one radially directed projection which extends into the groove in the housing; and the means for applying a resilient force comprises the separator body including a second end ring which is elastic and is shaped for resiliently pressing the magnets against the first end ring to provide accurate axial positioning of the magnets.
Claim 2
Dependent Claim
151 words
A separator for positioning magnets in a motor, comprising: the motor having a housing and a groove formed in said housing; the separator having a generally annularly shaped elastic body with an outer circumferential periphery on which the magnets are located, the separator including means for holding the magnets at circumferentially spaced locations around the separator body, the separator including means for applying a resilient force to the magnets to hold the magnets to the separator; the separator body including a first end ring positioned at one end of the separator body, the separator body including at least one radially directed projection which extends into the groove in the housing; and the means for applying a resilient force comprises the separator body including a second end ring which is elastic and is shaped for resiliently pressing the magnets against the first end ring to provide accurate axial positioning of the magnets.
Claim 3
Dependent Claim
21 words
A separator as in claim 1, in which each of the magnets is in the shape of an arcuate annular segment.
Claim 4
Dependent Claim
35 words
A separator as in claim 2, in which the magnets are internally curved to conform to a shaft of the motor and externally curved to conform to the shape of a housing of the motor.
Claim 5
Dependent Claim
14 words
A separator as in claim 1, wherein the separator body is made of plastic.
Claim 6
Dependent Claim
41 words
A separator as in claim 1, in which the magnet holding means includes a plurality of circumferentially spaced depressions arranged on the outer periphery of the separator, each one of the magnets being located in a respective one of the depressions.
Claim 7
Dependent Claim
38 words
A separator as in claim 5, in which the separator body comprises an annularly shaped cage which is shaped for defining a circumferential array of open bottom recesses, each recess being for receiving and holding a respective magnet.
Claim 8
Dependent Claim
11 words
A separator as in claim 1, wherein the projection is annular.
Claim 9
Dependent Claim
13 words
A separator as in claim 1, wherein the projection is annular segmented circumferentially.
Claim 10
Dependent Claim
25 words
A separator as in claim 1, which comprises axially directed holes formed in at least one end ring each for receiving a respective balancing weight.
Claim 11
Dependent Claim
22 words
The separator of claim 1 in which the first and second end rings are integrated into the separator to form a unit.
Claim 12
Dependent Claim
23 words
The separator of claim 1 in which the second end ring includes axially inwardly curved surfaces for applying axial force to the magnets.
Claim 13
Dependent Claim
23 words
The separator of claim 11 in which the second end ring inwardly curved surfaces comprise an undulating surface for the second end ring.
Claim 14
Dependent Claim
15 words
The separator of claim 1 in which the projection is at the first end ring.
References Cited (Backward Citations)
US3368275A
Cited
US3789250A
Cited
US4219752A
Cited
US4338533A
Cited
FR2430122A1
Cited
US4488073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-11 | 1990-11-10 | 1991-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-11 | 1994-11-10 | 1995-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-11 | 1998-11-10 | 1999-05-12 | $7700.00 | Window Closed / Lapsed |