Patent US4242610A successfully refreshed from Google Patents.
US4242610A
Expired / Lapsed
US
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Wedge-shaped permanent magnet rotor assembly
Assignee: Garrett Corp
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Filing: 1978-12-26
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Granted: 1980-12-30
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Expires: 1998-12-26
Abstract
Abstract A rotor assembly having self-locking wedge-shaped permanent magnets.
Inventors
- 👤 Frederick B. McCarty
- 👤 Alexander Silver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:27
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2706; H02K1/272; H02K1/274; H02K1/2753; H02K1/278; H02K1/24
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
110 words
In an electrical machine having a rotor and a stator, said rotor comprising: a cylindrical hub; a plurality of inwardly converging wedge-shaped support members located around and affixed to the periphery of said hub; a plurality of wedge-shaped permanent magnets with radially extending outwardly converging sides disposed between said support members; said sides of said magnets forming an angle within the range of 2 to 9 degrees with a plane parallel to a central radius through said magnet such that the magnets are locked in place after said rotor ceases to rotate and the magnets will not fracture due to excessive compressive forces applied to the sides of said magnets.
Claim 2
Dependent Claim
110 words
In an electrical machine having a rotor and a stator, said rotor comprising: a cylindrical hub; a plurality of inwardly converging wedge-shaped support members located around and affixed to the periphery of said hub; a plurality of wedge-shaped permanent magnets with radially extending outwardly converging sides disposed between said support members; said sides of said magnets forming an angle within the range of 2 to 9 degrees with a plane parallel to a central radius through said magnet such that the magnets are locked in place after said rotor ceases to rotate and the magnets will not fracture due to excessive compressive forces applied to the sides of said magnets.
Claim 3
Dependent Claim
110 words
In an electrical machine having a rotor and a stator, said rotor comprising: a cylindrical hub; a plurality of inwardly converging wedge-shaped support members located around and affixed to the periphery of said hub; a plurality of wedge-shaped permanent magnets with radially extending outwardly converging sides disposed between said support members; said sides of said magnets forming an angle within the range of 6 to 8 degrees with a plane parallel to a central radius through said magnet such that the magnets are locked in place after said rotor ceases to rotate and the magnets will not fracture due to excessive compressive forces applied to the sides of said magnets.
Claim 4
Dependent Claim
110 words
In an electrical machine having a rotor and a stator, said rotor comprising: a cylindrical hub; a plurality of inwardly converging wedge-shaped support members located around and affixed to the periphery of said hub; a plurality of wedge-shaped permanent magnets with radially extending outwardly converging sides disposed between said support members; said sides of said magnets forming an angle within the range of 6 to 8 degrees with a plane parallel to a central radius through said magnet such that the magnets are locked in place after said rotor ceases to rotate and the magnets will not fracture due to excessive compressive forces applied to the sides of said magnets.
Claim 5
Dependent Claim
101 words
A permanent magnet rotor assembly comprising: a non-magnetic rotatable hub; a plurality of ferromagnetic inwardly converging wedge-shaped support members equally spaced around the periphery of said hub and affixed thereto to form a plurality of outwardly converging wedge-shaped slots therebetween; and a plurality of wedge-shaped tangentially magnetized permanent magnets having outwardly converging sides, individual magnets disposed in individual outwardly converging wedge-shaped slots between said support members with a gap between said permanent magnets and the periphery of said hub, said magnets forming an angle within the range of 2-9 degrees with a plane parallel to a central radius of said magnet.
Claim 6
Dependent Claim
101 words
A permanent magnet rotor assembly comprising: a non-magnetic rotatable hub; a plurality of ferromagnetic inwardly converging wedge-shaped support members equally spaced around the periphery of said hub and affixed thereto to form a plurality of outwardly converging wedge-shaped slots therebetween; and a plurality of wedge-shaped tangentially magnetized permanent magnets having outwardly converging sides, individual magnets disposed in individual outwardly converging wedge-shaped slots between said support members with a gap between said permanent magnets and the periphery of said hub, said magnets forming an angle within the range of 2-9 degrees with a plane parallel to a central radius of said magnet.
Claim 7
Dependent Claim
104 words
A permanent magnet rotor assembly comprising: a non-magnetic rotatable hub; a plurality of ferromagnetic inwardly converging wedge-shaped support members equally spaced around the periphery of said hub and affixed thereto to form a plurality of outwardly converging wedge-shaped slots therebetween; and a plurality of wedge-shaped tangentially magnetized permanent magnets having outwardly converging sides, individual magnets disposed in individual outwardly converging wedge-shaped slots between said support members with a gap between said permanent magnets and the periphery of said hub, said magnets forming an angle within the range of 6 to 8 degrees with a plane parallel to a central radius of said magnet assembly.
Claim 8
Dependent Claim
104 words
A permanent magnet rotor assembly comprising: a non-magnetic rotatable hub; a plurality of ferromagnetic inwardly converging wedge-shaped support members equally spaced around the periphery of said hub and affixed thereto to form a plurality of outwardly converging wedge-shaped slots therebetween; and a plurality of wedge-shaped tangentially magnetized permanent magnets having outwardly converging sides, individual magnets disposed in individual outwardly converging wedge-shaped slots between said support members with a gap between said permanent magnets and the periphery of said hub, said magnets forming an angle within the range of 6 to 8 degrees with a plane parallel to a central radius of said magnet assembly.
Claim 9
Dependent Claim
134 words
A permanent magnet rotor assembly comprising: a non-magnetic rotatable hub; a plurality of ferromagnetic inwardly converging wedge-shaped support members equally spaced around the periphery of said hub and affixed thereto to form a plurality of outwardly converging wedge-shaped slots therebetween; and a plurality of wedge-shaped tangentially magnetized permanent magnets having outwardly converging sides, individual magnets disposed in individual outwardly converging wedge-shaped slots between said support members with a gap between said permanent magnets and the periphery of said hub; said sides of said magnets forming an angle within the range of 2 to 9 degrees with a plane parallel to a central radius whereby the magnets are locked in place after said rotor ceases to rotate and the magnets will not fracture due to excessive compressive forces applied to the sides of said magnets.
Claim 10
Dependent Claim
134 words
A permanent magnet rotor assembly comprising: a non-magnetic rotatable hub; a plurality of ferromagnetic inwardly converging wedge-shaped support members equally spaced around the periphery of said hub and affixed thereto to form a plurality of outwardly converging wedge-shaped slots therebetween; and a plurality of wedge-shaped tangentially magnetized permanent magnets having outwardly converging sides, individual magnets disposed in individual outwardly converging wedge-shaped slots between said support members with a gap between said permanent magnets and the periphery of said hub; said sides of said magnets forming an angle within the range of 2 to 9 degrees with a plane parallel to a central radius whereby the magnets are locked in place after said rotor ceases to rotate and the magnets will not fracture due to excessive compressive forces applied to the sides of said magnets.
Claim 11
Dependent Claim
134 words
A permanent magnet rotor assembly comprising: a non-magnetic rotatable hub; a plurality of ferromagnetic inwardly converging wedge-shaped support members equally spaced around the periphery of said hub and affixed thereto to form a plurality of outwardly converging wedge-shaped slots therebetween; and a plurality of wedge-shaped tangentially magnetized permanent magnets having outwardly converging sides, individual magnets disposed in individual outwardly converging wedge-shaped slots between said support members with a gap between said permanent magnets and the periphery of said hub; said sides of said magnets forming an angle within the range of 6 to 8 degrees with a plane parallel to a central radius whereby the magnets are locked in place after said rotor ceases to rotate and the magnets will not fracture due to excessive compressive forces applied to the sides of said magnets.
Claim 12
Dependent Claim
134 words
A permanent magnet rotor assembly comprising: a non-magnetic rotatable hub; a plurality of ferromagnetic inwardly converging wedge-shaped support members equally spaced around the periphery of said hub and affixed thereto to form a plurality of outwardly converging wedge-shaped slots therebetween; and a plurality of wedge-shaped tangentially magnetized permanent magnets having outwardly converging sides, individual magnets disposed in individual outwardly converging wedge-shaped slots between said support members with a gap between said permanent magnets and the periphery of said hub; said sides of said magnets forming an angle within the range of 6 to 8 degrees with a plane parallel to a central radius whereby the magnets are locked in place after said rotor ceases to rotate and the magnets will not fracture due to excessive compressive forces applied to the sides of said magnets.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |