US4882513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual permanent magnet generator
Assignee: Sundstrand Corp
•
Filing: 1985-12-23
•
Granted: 1989-11-21
•
Expires: 2005-12-23
Abstract
Abstract The effects of operational loading on a permanent magnet generator of the type having first and second permanent magnet assemblies 28, 30 mounted on a shaft 26, and movable relative to each other is eliminated by rotatably mounting each of the assemblies 28, 30 for rotation relative to the shaft 26, as well as to each other, and connecting them to the shaft by equal, but oppositely pitched helical spline connections 50, 52, 58, 60. Axial movement of the shaft 26 will then cause equal, but opposite relative movement of the permanent magnet assemblies 28, 30, so that the forces resisting movement of one such assembly act to encourage movement of the other, thereby balancing out said forces.
Inventors
- 👤 Wayne A. Flygare
- 👤 Raymond N. Olson
- 👤 Richard W. Reynolds
- 👤 Mohd A. Aleem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:13
CPC Classifications
H; H02; H02K; H02K21/00; H02K21/02; H02K21/021; H02K21/028; H02K21/029; H02K21/12; H02K21/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
149 words
A permanent magnet generator comprising: an elongated shaft having opposed ends; first and second helical splines on said shaft adjacent respective ends thereof, said splines having opposite pitches; first and second permanent magnet assemblies located about said shaft and rotatable with respect thereto; a thrust and journal bearing for said permanent magnet assmblies; said first magnet assembly being to one side of said bearing and connected to said first spline; said second magnet assembly being on the other side of said bearing and connected to said second spline; a stator including an armature means coaxial with said shaft and having an axial extent encompassing said magnet assemblies, said armature means mounting said bearing intermediate the ends of said armature means; and means for axially moving said shaft relative to said bearing and said magnet assemblies to cause said magnet assemblies to simultaneously rotate in opposite directions on said shaft.
Claim 2
Dependent Claim
149 words
A permanent magnet generator comprising: an elongated shaft having opposed ends; first and second helical splines on said shaft adjacent respective ends thereof, said splines having opposite pitches; first and second permanent magnet assemblies located about said shaft and rotatable with respect thereto; a thrust and journal bearing for said permanent magnet assmblies; said first magnet assembly being to one side of said bearing and connected to said first spline; said second magnet assembly being on the other side of said bearing and connected to said second spline; a stator including an armature means coaxial with said shaft and having an axial extent encompassing said magnet assemblies, said armature means mounting said bearing intermediate the ends of said armature means; and means for axially moving said shaft relative to said bearing and said magnet assemblies to cause said magnet assemblies to simultaneously rotate in opposite directions on said shaft.
Claim 3
Dependent Claim
15 words
The permanent magnet generator of claim 1 wherein said moving means comprises a control piston.
Claim 4
Dependent Claim
39 words
The permanent magnet generator of claim 1 wherein one end of said shaft includes an axial spline, a drive shaft axially aligned with said shaft one end, and a spline collar interconnecting said drive shaft and said axial spline.
Claim 5
Dependent Claim
27 words
The permanent magnet generator of claim 3 wherein said moving means comprises a motor connected to said elongated shaft at the end thereof opposite said one end.
References Cited (Backward Citations)
US1070437A
Cited
US1104793A
Cited
DE839061C
Cited
US2740909A
Cited
CH443472A
Cited
US3233133A
Cited
US3405296A
Cited
US3713015A
Cited
FR2191329A1
Cited
US4031421A
Cited
US4110649A
Cited
US4305031A
Cited
US4229689A
Cited
EP0058025A1
Cited
DE3317553A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |