US4137884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magneto for motor vehicle
Assignee: Hitachi Ltd
•
Filing: 1976-07-15
•
Granted: 1979-02-06
•
Expires: 1996-07-15
Abstract
Abstract A magneto for a motor vehicle includes a flywheel having an exciting source and adapted to rotate in timed relation to the engine, and an armature to be excited by the exciting source. It also comprises an elastic steel cover on at least the inner surfaces of its magnet elements, so that the elements are pressed against, and positioned with respect to, the inner surface of the rim of tray-shaped flywheel.
Inventors
- 👤 Mituo Odazima
- 👤 Rokuro Kikuchi
- 👤 Arata Ataka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:37
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2786; H02K1/2787; H02K1/2789; H02K1/2791; H02K1/27915
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
82 words
In a magneto for a motor vehicle including a flywheel adapted to be driven in timed relation to the engine and a set of magnet elements secured as an excitation source to the inner peripheral surface of the rim of said flywheel, the improvement comprising a ring-shaped magnet element holder of spring steel capable of expanding outwardly and fitted to the inner peripheral surfaces of said magnet elements and secured altogether to said inner peripheral surface of said flywheel rim with adhesive.
Claim 2
Dependent Claim
82 words
In a magneto for a motor vehicle including a flywheel adapted to be driven in timed relation to the engine and a set of magnet elements secured as an excitation source to the inner peripheral surface of the rim of said flywheel, the improvement comprising a ring-shaped magnet element holder of spring steel capable of expanding outwardly and fitted to the inner peripheral surfaces of said magnet elements and secured altogether to said inner peripheral surface of said flywheel rim with adhesive.
Claim 3
Dependent Claim
55 words
A magneto as claimed in claim 1, wherein said magnet element holder has several outwardly protruding or bulging portions, which are located in the gaps between the adjacent magnet elements so that said portions can also position said elements in the direction of rotation with respect to said inner peripheral surface of said flywheel rim.
Claim 4
Dependent Claim
50 words
A magneto as claimed in claim 1, wherein said magnet element holder has outwardly extending tongues in the portions corresponding to the gaps between the adjacent magnet elements so as to engage the sides of said elements and thereby prevent the movement of said elements in the direction of rotation.
Claim 5
Dependent Claim
113 words
In a magneto for a motor vehicle including a flywheel adapted to be driven in timed relation to the engine and a set of magnet elements secured as an excitation source to the inner peripheral surface of the rim of said flywheel so that the magneto generates energy output with the running of the engine, the improvement comprising a first and a second side rings of nonmagnetic material covering the both sides of said magnet elements, and a magnet element holder of spring steel capable of expanding outwardly and fitted to the inner peripheral surfaces of said magnet elements and secured altogether to said inner peripheral surface of said flywheel rim with adhesive.
Claim 6
Dependent Claim
113 words
In a magneto for a motor vehicle including a flywheel adapted to be driven in timed relation to the engine and a set of magnet elements secured as an excitation source to the inner peripheral surface of the rim of said flywheel so that the magneto generates energy output with the running of the engine, the improvement comprising a first and a second side rings of nonmagnetic material covering the both sides of said magnet elements, and a magnet element holder of spring steel capable of expanding outwardly and fitted to the inner peripheral surfaces of said magnet elements and secured altogether to said inner peripheral surface of said flywheel rim with adhesive.
Claim 7
Dependent Claim
54 words
A magneto as claimed in claim 4, wherein said first side ring is axially positioned by an annular step formed on the inner corner of said flywheel, and said second side ring is secured in position by one of a curled and deformed inner edge of said flywheel pressed inwardly against said second ring.
Claim 8
Dependent Claim
39 words
A magneto as claimed in claim 1, wherein said magnet element holder is fitted to the inner peripheral surfaces of said magnet elements for biasing said magnetic elements towards the inner peripheral surface of the rim of said flywheel.
Claim 9
Dependent Claim
39 words
A magneto as claimed in claim 4, wherein said magnet element holder is fitted to the inner peripheral surfaces of said magnet elements for biasing said magnetic elements towards the inner peripheral surface of the rim of said flywheel.
Claim 10
Dependent Claim
16 words
A magneto as claimed in claim 4, wherein said magnet element holder is a ring-shaped member.
Claim 11
Dependent Claim
76 words
In a magneto for a motor vehicle including a flywheel adapted to be driven in timed relation to the engine and a set of magnet elements secured as an excitation source to the inner peripheral surface of the rim of said flywheel, the improvement comprising elastic means of spring steel contacting at least the inner peripheral surfaces of said magnet elements for biasing said magnet elements outwardly towards the inner peripheral surface of said flywheel rim.
Claim 12
Dependent Claim
76 words
In a magneto for a motor vehicle including a flywheel adapted to be driven in timed relation to the engine and a set of magnet elements secured as an excitation source to the inner peripheral surface of the rim of said flywheel, the improvement comprising elastic means of spring steel contacting at least the inner peripheral surfaces of said magnet elements for biasing said magnet elements outwardly towards the inner peripheral surface of said flywheel rim.
Claim 13
Dependent Claim
39 words
A magneto as claimed in claim 9, wherein said elastic means is a thin ring-shaped member contacting the inner peripheral surfaces of said magnet elements and secured therewith to the inner peripheral surface of said flywheel rim with adhesive.
Claim 14
Dependent Claim
30 words
A magneto as claimed in claim 10, wherein said ring-shaped member biases said magnetic elements outwardly and positions said magnetic elements along the inner peripheral surface of said flywheel rim.
Claim 15
Dependent Claim
54 words
A magneto as claimed in claim 11, wherein said ring-shaped member has several outwardly protruding or bulging portions, which are located in the gaps between the adjacent magnet elements so that said portions can also position said elements in the direction of rotation with respect to the inner peripheral surface of said flywheel rim.
Claim 16
Dependent Claim
49 words
A magneto as claimed in claim 11, wherein said ring-shaped member has outwardly extending tongues in the portions corresponding to the gaps between the adjacent magnet elements so as to engage the sides of said elements and thereby prevent the movement of said elements in the direction or rotation.
Claim 17
Dependent Claim
24 words
A magneto as claimed in claim 11, further comprising first and second side rings of non-magnetic material covering both sides of said magnet elements.
Claim 18
Dependent Claim
54 words
A magneto as claimed in claim 14, wherein said first side ring is axially positioned by an annular step formed on the inner corner of said flywheel, and said second side ring is secured in position by one of a curled and deformed inner edge of said flywheel pressed inwardly against said second ring.
References Cited (Backward Citations)
US2060881A
Cited
US2583466A
Cited
GB850193A
Cited
US3258623A
Cited
US3265913A
Cited
DE2223682A1
Cited
US3818586A
Cited
US3828212A
Cited
US3974817A
Cited
US4012651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |