Patent US2206334A successfully refreshed from Google Patents.
US4296544A
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US
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Method of making rotor assembly with magnet cushions
Assignee: Garrett Corp
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Filing: 1980-03-11
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Granted: 1981-10-27
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Expires: 2000-03-11
Abstract
Abstract A rotor having wedge-shaped permanent magnets and cushions between the magnets and their support members.
Inventors
- 👤 Lyman R. Burgmeier
- 👤 Frederick B. McCarty
- 👤 Alexander Silver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:23
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2706; H02K1/272; H02K1/274; H02K1/2753; H02K1/278; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
67 words
A method of inserting outwardly converging wedge-shaped magnets into outwardly converging wedge-shaped slots in a rotor assembly, comprising the steps of: placing cushions in contact with the walls of the slots; placing the magnets into the outwardly converging wedge-shaped slots in the rotor assembly; and rotating the rotor assembly until the magnets become wedged in place in the slots by flowing the material of the cushions therebetween.
Claim 2
Independent Claim
67 words
A method of inserting outwardly converging wedge-shaped magnets into outwardly converging wedge-shaped slots in a rotor assembly, comprising the steps of: placing cushions in contact with the walls of the slots; placing the magnets into the outwardly converging wedge-shaped slots in the rotor assembly; and rotating the rotor assembly until the magnets become wedged in place in the slots by flowing the material of the cushions therebetween.
Claim 3
Dependent Claim
21 words
A method as recited in claim 1, further comprising: shrinking an electrically dampening hoop around the periphery of the rotor assembly.
Claim 4
Independent Claim
92 words
A method of retaining a magnet in a rotor assembly of an electric generator, comprising the steps of: forming a plurality of wedge-shaped permanent magnets with outwardly converging sides: forming a plurality of outwardly converging wedge-shaped slots around the periphery of the rotor to a depth greater than the formed premanent magnets; placing a cushion in contact with the walls of the slots; inserting the outwardly-converging permanent magnets into the outwardly-converging slots; and rotating the rotor until the magnets become wedged into the slots by conforming the cushions to the space therebetween.
Claim 5
Independent Claim
92 words
A method of retaining a magnet in a rotor assembly of an electric generator, comprising the steps of: forming a plurality of wedge-shaped permanent magnets with outwardly converging sides: forming a plurality of outwardly converging wedge-shaped slots around the periphery of the rotor to a depth greater than the formed premanent magnets; placing a cushion in contact with the walls of the slots; inserting the outwardly-converging permanent magnets into the outwardly-converging slots; and rotating the rotor until the magnets become wedged into the slots by conforming the cushions to the space therebetween.
Claim 6
Independent Claim
88 words
A method of constructing a rotor for a permanent magnet machine, comprising the steps of: forming a plurality of equally spaced outwardly converging wedge-shaped slots around the periphery of a rotor hub; placing individual plastically deformable cushions in contact with each of the slot walls; inserting outwardly converging wedge-shaped magnets into the slots; and rotating the rotor to wedge the outwardly converging wedge-shaped magnets in the outwardly converging wedge-shaped slots by conforming the shape of the plastically deformable cushions to the space between the magnets and the slots.
Claim 7
Independent Claim
88 words
A method of constructing a rotor for a permanent magnet machine, comprising the steps of: forming a plurality of equally spaced outwardly converging wedge-shaped slots around the periphery of a rotor hub; placing individual plastically deformable cushions in contact with each of the slot walls; inserting outwardly converging wedge-shaped magnets into the slots; and rotating the rotor to wedge the outwardly converging wedge-shaped magnets in the outwardly converging wedge-shaped slots by conforming the shape of the plastically deformable cushions to the space between the magnets and the slots.
Claim 8
Independent Claim
104 words
A method of forming a rotor for a permanent magnet machine, comprising the steps of: forming a plurality of equally spaced outwardly converging, wedge-shaped slots around the periphery of a rotor hub; placing an individual cushion element on either side of each individual wedge-shaped slot, each cushion element having a perforated side in contact with the side of the slot and an oppositely disposed smooth side; inserting a plurality of wedge-shaped permanent magnets having outwardly converging sides in the outwardly converging wedged-shaped slots between the cushion elements therein; and rotating the rotor to wedge the outwardly converging permanent magnets into the outwardly converging slots.
Claim 9
Independent Claim
104 words
A method of forming a rotor for a permanent magnet machine, comprising the steps of: forming a plurality of equally spaced outwardly converging, wedge-shaped slots around the periphery of a rotor hub; placing an individual cushion element on either side of each individual wedge-shaped slot, each cushion element having a perforated side in contact with the side of the slot and an oppositely disposed smooth side; inserting a plurality of wedge-shaped permanent magnets having outwardly converging sides in the outwardly converging wedged-shaped slots between the cushion elements therein; and rotating the rotor to wedge the outwardly converging permanent magnets into the outwardly converging slots.
Claim 10
Independent Claim
117 words
A method of forming a permanent magnet rotor comprising the steps of: forming a plurality of outwardly converging wedge-shaped slots equally spaced around the periphery of a non-magnetic rotatable hub by affixing thereto a plurality of inwardly converging wedge-shaped ferromagnetic support members; placing a pair of plastically deformable cushions into the outwardly converging wedge-shaped slots, one cushion on each side of said slots; inserting a plurality of wedge-shaped tangentially magnetized permanent magnets having outwardly converging sides, individual magnets disposed in individual outwardly converging wedge-shaped slots between the pair of plastically deformable cushions; and rotating the rotor to wedge the outwardly converging permanent magnets in place in the outwardly converging slots by plastically deforming the pair of cushions.
Claim 11
Independent Claim
117 words
A method of forming a permanent magnet rotor comprising the steps of: forming a plurality of outwardly converging wedge-shaped slots equally spaced around the periphery of a non-magnetic rotatable hub by affixing thereto a plurality of inwardly converging wedge-shaped ferromagnetic support members; placing a pair of plastically deformable cushions into the outwardly converging wedge-shaped slots, one cushion on each side of said slots; inserting a plurality of wedge-shaped tangentially magnetized permanent magnets having outwardly converging sides, individual magnets disposed in individual outwardly converging wedge-shaped slots between the pair of plastically deformable cushions; and rotating the rotor to wedge the outwardly converging permanent magnets in place in the outwardly converging slots by plastically deforming the pair of cushions.
Claim 12
Dependent Claim
42 words
A method of claim 1, 3, 4, 5, or 6 wherein the sides of said individual magnets form an angle within the range of 2-9 degrees with a plane parallel to the rotor radius through the center line of said individual magnets.
Claim 13
Dependent Claim
42 words
A method of claim 1, 3, 4, 5, or 6 wherein the sides of said individual magnets form an angle within the range of 6-8 degrees with a plane parallel to the rotor radius through the center line of said individual magnets.
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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) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |