Patent US4423345A successfully refreshed from Google Patents.
US4423345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magneto flywheel assembly
Assignee: SVENSKA ELEKTROMAGNETER A SWEDISH CORP AB
•
Filing: 1981-01-22
•
Granted: 1983-12-27
•
Expires: 2001-01-22
Abstract
Abstract A magneto flywheel includes arcuate ceramic magnets of non-uniform radial thickness. A rotor for the flywheel is made of soft material. The magnets of the magneto flywheel have a set of radial poles of alternating polarity, and an other set of opposite poles directed toward the cylindrical periphery of the magneto rotor. A ferromagnetic band of deflectible material with the surface projection is disposed between the rotor and the magnets.
Inventors
- 👤 Mats Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:59
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2786; H02K1/2787; H02K1/2789; H02K1/2791; H02K15/00; H02K15/02; H02K15/03; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
197 words
A magneto flywheel assembly, comprising: (a) a rotor having a cylindrical periphery of relatively soft material; (b) a series of arcuate ceramic magnets fixed on said rotor and arranged in a circle and disposed along said cylindrical periphery, said magnets having a non-uniform radial thickness, said magnets having a first set of radial poles of alternating polarity directed radially away from said cylindrical periphery and arranged cylindrically, and a second set of opposite poles directed toward said cylindrical periphery, there thereby being a variation in spacing between said second set and said periphery; and (c) a band of deflectable ferromagnetic metal harder than said soft material, and disposed between said magnets and said periphery, said band having a number of surface projections directed toward said periphery, said band having a thickness remote from said projections corresponding to the minimum size of said variation in spacing, and a thickness through said projections corresponding to the maximum size of said variation in spacing; whereby said cylindrical periphery forces said band to deflect against said variably disposed second set of poles and permits certain of said projections to be radially received at least in part into the softer cylindrical periphery.
Claim 2
Dependent Claim
197 words
A magneto flywheel assembly, comprising: (a) a rotor having a cylindrical periphery of relatively soft material; (b) a series of arcuate ceramic magnets fixed on said rotor and arranged in a circle and disposed along said cylindrical periphery, said magnets having a non-uniform radial thickness, said magnets having a first set of radial poles of alternating polarity directed radially away from said cylindrical periphery and arranged cylindrically, and a second set of opposite poles directed toward said cylindrical periphery, there thereby being a variation in spacing between said second set and said periphery; and (c) a band of deflectable ferromagnetic metal harder than said soft material, and disposed between said magnets and said periphery, said band having a number of surface projections directed toward said periphery, said band having a thickness remote from said projections corresponding to the minimum size of said variation in spacing, and a thickness through said projections corresponding to the maximum size of said variation in spacing; whereby said cylindrical periphery forces said band to deflect against said variably disposed second set of poles and permits certain of said projections to be radially received at least in part into the softer cylindrical periphery.
Claim 3
Dependent Claim
24 words
A magneto flywheel assembly according to claim 1, said projections being directed radially outwardly against said cylindrical periphery, the latter being directed radially inwardly.
Claim 4
Dependent Claim
48 words
A magneto flywheel assembly according to claim 2, said projections comprising hemispherical nodules lying in a plurality of circumferential rows, said band carrying said projections extending arcuately for less than 360°, said softer cylindrical surface comprising aluminum, and said magnets and said band being encapsulated in molded plastic.
Claim 5
Dependent Claim
16 words
A magneto flywheel assembly according to claim 1, said band extending arcuately for less than 360°.
Claim 6
Dependent Claim
14 words
A magneto flywheel assembly according to claim 1, said softer cylindrical surface comprising aluminum.
Claim 7
Dependent Claim
13 words
A magneto flywheel assembly according to claim 1, said projections comprising hemispherical nodules.
Claim 8
Dependent Claim
17 words
A magneto flywheel assembly according to claim 1, said projections lying in a plurality of circumferential rows.
Claim 9
Dependent Claim
37 words
A magneto flywheel assembly according to claim 1, including molded plastic between said band and said cylindrical periphery and filling voids adjacent to those of said projections which are not fully received in said softer cylindrical periphery.
References Cited (Backward Citations)
US2945138A
Cited
US3258623A
Cited
US3290525A
Cited
US3663850A
Cited
US3818586A
Cited
US3828212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-26 | 1987-06-27 | 1987-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-26 | 1991-06-27 | 1991-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-26 | 1995-06-27 | 1995-12-27 | $7700.00 | Window Closed / Lapsed |