Patent US5751077A successfully refreshed from Google Patents.
US5751077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-cooled linear motor armature
Assignee: Ford Global Technologies LLC
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Filing: 1997-03-27
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Granted: 1998-05-12
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Expires: 2017-03-27
Abstract
Abstract A linear motor armature includes a sealed metal case having a central chamber formed therein. A lamination stack is disposed within the central chamber and includes a coil assembly disposed within the lamination stack. The central chamber is flooded with an electrically nonconductive fluid, such as oil, for cooling the coil. The cooling oil is flowed in opposing directions to facilitate bidirectional cooling of the coil.
Inventors
- 👤 Cesar Gonzalez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:25
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K9/00; H02K9/19; H02K9/197
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
52 words
A linear motor armature, comprising: a sealed metal case having a central chamber formed therein; a lamination stack disposed within the central chamber; and a coil assembly disposed within the lamination stack; wherein the central chamber is flooded with an electrically nonconductive fluid for directly cooling said lamination stack and coil assembly.
Claim 2
Dependent Claim
52 words
A linear motor armature, comprising: a sealed metal case having a central chamber formed therein; a lamination stack disposed within the central chamber; and a coil assembly disposed within the lamination stack; wherein the central chamber is flooded with an electrically nonconductive fluid for directly cooling said lamination stack and coil assembly.
Claim 3
Dependent Claim
30 words
The linear motor armature of claim 1, further comprising at least two moisture-sealed mechanical fittings extending from the sealed metal case for attachment of electrical connectors to said coil assembly.
Claim 4
Dependent Claim
23 words
The linear motor armature of claim 1, wherein said sealed metal case further comprises a central chamber cover disposed over the central chamber.
Claim 5
Dependent Claim
15 words
The linear motor armature of claim 1, wherein said sealed metal case comprises cast aluminum.
Claim 6
Dependent Claim
21 words
The linear motor armature of claim 1, further comprising a flow restriction member for directing fluid flow through said central chamber.
Claim 7
Dependent Claim
14 words
The linear motor armature of claim 1, wherein said electrically nonconductive fluid comprises oil.
Claim 8
Independent Claim
58 words
A method of manufacturing a linear motor armature, comprising: providing a sealable metal case with a central chamber formed therein; installing a coil assembly and lamination stack within the central chamber; sealing the central chamber; and providing a source of electrically nonconductive fluid in communication with the central chamber for directly cooling said lamination stack and coil assembly.
Claim 9
Independent Claim
58 words
A method of manufacturing a linear motor armature, comprising: providing a sealable metal case with a central chamber formed therein; installing a coil assembly and lamination stack within the central chamber; sealing the central chamber; and providing a source of electrically nonconductive fluid in communication with the central chamber for directly cooling said lamination stack and coil assembly.
Claim 10
Dependent Claim
28 words
The method of claim 7, further comprising providing at least two moisture-sealed mechanical fittings on the metal case for sealed attachment of electrical connectors to said coil assembly.
Claim 11
Dependent Claim
111 words
A linear motor armature, comprising: a sealed metal case having a central chamber formed therein; a lamination stack disposed within the central chamber; a coil assembly disposed within the lamination stack; a source of electrically nonconductive fluid in fluid communication with said central chamber for directly cooling said coil assembly; and at least two moisture-sealed mechanical fittings extending from the sealed metal case for sealed and protected attachment of electrical connectors to said coil assembly, wherein said armature is configured to receive externally introduced electrically non-conductive fluid in opposing ends of the armature and to direct the electrically nonconductive fluid in opposing directions across the lamination stack within the central chamber.
Claim 12
Dependent Claim
111 words
A linear motor armature, comprising: a sealed metal case having a central chamber formed therein; a lamination stack disposed within the central chamber; a coil assembly disposed within the lamination stack; a source of electrically nonconductive fluid in fluid communication with said central chamber for directly cooling said coil assembly; and at least two moisture-sealed mechanical fittings extending from the sealed metal case for sealed and protected attachment of electrical connectors to said coil assembly, wherein said armature is configured to receive externally introduced electrically non-conductive fluid in opposing ends of the armature and to direct the electrically nonconductive fluid in opposing directions across the lamination stack within the central chamber.
Claim 13
Dependent Claim
23 words
The linear motor armature of claim 9, wherein said sealed metal case further comprises a central chamber cover disposed over the central chamber.
Claim 14
Dependent Claim
15 words
The linear motor armature of claim 9, wherein said sealed metal case comprises cast aluminum.
Claim 15
Dependent Claim
14 words
The linear motor armature of claim 9, wherein said electrically nonconductive fluid comprises oil.
References Cited (Backward Citations)
DE197809C
Cited
US3668444A
Cited
US3835339A
Cited
US4445056A
Cited
US4749921A
Cited
US4839545A
Cited
US4985651A
Cited
US5179304A
Cited
US5703418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-11 | 2001-11-10 | 2002-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-11 | 2005-11-10 | 2006-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-11 | 2009-11-10 | 2010-05-12 | $7700.00 | Window Closed / Lapsed |