Patent US4339874A successfully refreshed from Google Patents.
US4339874A
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Method of making a wedge-shaped permanent magnet rotor assembly
Assignee: Garrett Corp
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Filing: 1980-03-10
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Granted: 1982-07-20
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Expires: 2000-03-10
Abstract
Abstract A rotor assembly having self-locking wedge-shaped permanent magnets.
Inventors
- 👤 Frederick B. Mc'Carty
- 👤 Alexander Silver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:28
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: 12
Claim 1
Independent Claim
88 words
A method of forming a rotor for a permanent magnet machine, comprising the steps of: affixing a plurality of inwardly converging, wedge-shaped support members equally spaced around the periphery of a rotor hub to form a plurality of outwardly converging, wedge-shaped slots therebetween; inserting a plurality of wedge-shaped permanent magnets having outwardly converging sides, individual magnets disposed in individually outwardly converging wedge-shaped slots between support members; and rotating the rotor to wedge the outwardly converging permanent magnets into the outwardly converging slots without additional restraint on said magnets.
Claim 2
Independent Claim
88 words
A method of forming a rotor for a permanent magnet machine, comprising the steps of: affixing a plurality of inwardly converging, wedge-shaped support members equally spaced around the periphery of a rotor hub to form a plurality of outwardly converging, wedge-shaped slots therebetween; inserting a plurality of wedge-shaped permanent magnets having outwardly converging sides, individual magnets disposed in individually outwardly converging wedge-shaped slots between support members; and rotating the rotor to wedge the outwardly converging permanent magnets into the outwardly converging slots without additional restraint on said magnets.
Claim 3
Independent Claim
119 words
A method of forming a rotor for a permanent magnet machine, comprising the steps of: affixing a plurality of inwardly converging, wedge-shaped support members equally spaced around the periphery of a rotor hub to form a plurality of outwardly converging, wedge-shaped slots therebetween; inserting a plurality of wedge-shaped permanent magnets having outwardly converging sides, individual magnets disposed in individually outwardly converging wedge-shaped slots between support members, the sides of said individual magnets forming 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; and rotating the rotor to wedge the outwardly converging permanent magnets into the outwardly converging slots without additional restraint on said magnets.
Claim 4
Independent Claim
119 words
A method of forming a rotor for a permanent magnet machine, comprising the steps of: affixing a plurality of inwardly converging, wedge-shaped support members equally spaced around the periphery of a rotor hub to form a plurality of outwardly converging, wedge-shaped slots therebetween; inserting a plurality of wedge-shaped permanent magnets having outwardly converging sides, individual magnets disposed in individually outwardly converging wedge-shaped slots between support members, the sides of said individual magnets forming 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; and rotating the rotor to wedge the outwardly converging permanent magnets into the outwardly converging slots without additional restraint on said magnets.
Claim 5
Independent Claim
119 words
A method of forming a rotor for a permanent magnet machine, comprising the steps of: affixing a plurality of inwardly converging, wedge-shaped support members equally spaced around the periphery of a rotor hub to form a plurality of outwardly converging, wedge-shaped slots therebetween; inserting a plurality of wedge-shaped permanent magnets having outwardly converging sides, individual magnets disposed in individually outwardly converging wedge-shaped slots between support members, the sides of said individual magnets forming 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; and rotating the rotor to wedge the outwardly converging permanent magnets into the outwardly converging slots without additional restraint on said magnets.
Claim 6
Independent Claim
119 words
A method of forming a rotor for a permanent magnet machine, comprising the steps of: affixing a plurality of inwardly converging, wedge-shaped support members equally spaced around the periphery of a rotor hub to form a plurality of outwardly converging, wedge-shaped slots therebetween; inserting a plurality of wedge-shaped permanent magnets having outwardly converging sides, individual magnets disposed in individually outwardly converging wedge-shaped slots between support members, the sides of said individual magnets forming 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; and rotating the rotor to wedge the outwardly converging permanent magnets into the outwardly converging slots without additional restraint on said magnets.
Claim 7
Independent Claim
103 words
A method of forming a permanent magnet rotor, comprising the steps of: permanently affixing a plurality of inwardly converging, wedge-shaped ferromagnetic support members equally spaced around the periphery of a non-magnetic rotatable hub to form a plurality of outwardly converging wedge-shaped slots therebetween; 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 support members; and without additional restraint on said magnets, rotating the rotor to wedge the outwardly converging permanent magnets in place in the outwardly converging slots without excessive compressive force applied to the sides of said magnets.
Claim 8
Independent Claim
103 words
A method of forming a permanent magnet rotor, comprising the steps of: permanently affixing a plurality of inwardly converging, wedge-shaped ferromagnetic support members equally spaced around the periphery of a non-magnetic rotatable hub to form a plurality of outwardly converging wedge-shaped slots therebetween; 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 support members; and without additional restraint on said magnets, rotating the rotor to wedge the outwardly converging permanent magnets in place in the outwardly converging slots without excessive compressive force applied to the sides of said magnets.
Claim 9
Independent Claim
133 words
A method of forming a permanent magnet rotor comprising the steps of: permanently affixing a plurality of inwardly converging wedge-shaped ferromagnetic support members equally spaced around the periphery of non-magnetic rotatable hub to form a plurality of outwardly converging wedge-shaped slots therebetween; 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 support members, the sides of said individual magnets forming 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; and without additional restraint on said magnets, rotating the rotor to wedge the outwardly converging permanent magnets in place in the outwardly converging slots without excessive compressive force applied to the sides of said magnets.
Claim 10
Independent Claim
133 words
A method of forming a permanent magnet rotor comprising the steps of: permanently affixing a plurality of inwardly converging wedge-shaped ferromagnetic support members equally spaced around the periphery of non-magnetic rotatable hub to form a plurality of outwardly converging wedge-shaped slots therebetween; 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 support members, the sides of said individual magnets forming 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; and without additional restraint on said magnets, rotating the rotor to wedge the outwardly converging permanent magnets in place in the outwardly converging slots without excessive compressive force applied to the sides of said magnets.
Claim 11
Independent Claim
133 words
A method of forming a permanent magnet rotor comprising the steps of: permanently affixing a plurality of inwardly converging wedge-shaped ferromagnetic support members equally spaced around the periphery of non-magnetic rotatable hub to form a plurality of outwardly converging wedge-shaped slots therebetween; 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 support members, the sides of said individual magnets forming 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; and without additional restraint on said magnets, rotating the rotor to wedge the outwardly converging permanent magnets in place in the outwardly converging slots without excessive compressive force applied to the sides of said magnets.
Claim 12
Independent Claim
133 words
A method of forming a permanent magnet rotor comprising the steps of: permanently affixing a plurality of inwardly converging wedge-shaped ferromagnetic support members equally spaced around the periphery of non-magnetic rotatable hub to form a plurality of outwardly converging wedge-shaped slots therebetween; 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 support members, the sides of said individual magnets forming 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; and without additional restraint on said magnets, rotating the rotor to wedge the outwardly converging permanent magnets in place in the outwardly converging slots without excessive compressive force applied to the sides of said 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) | 1985-07-19 | 1986-01-18 | 1986-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-19 | 1990-01-18 | 1990-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-19 | 1994-01-18 | 1994-07-20 | $7700.00 | Window Closed / Lapsed |