US4286475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite material flywheel hub
Assignee: Garrett Corp
•
Filing: 1979-09-26
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Granted: 1981-09-01
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Expires: 1999-09-26
Abstract
Abstract Unidirectional fiber-reinforced matrix material bars are stacked to form a lightweight, high strength hub for a composite material flywheel.
Inventors
- 👤 Johan A. Friedericy
- 👤 Dennis A. Towgood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:57
CPC Classifications
F; F16; F16C; F16C15/00; F16F; F16F15/00; F16F15/30; F16F15/305; F16C2361/00; F16C2361/55; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2117; Y10T74/2119; Y10T74/212
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
109 words
An improved hub for a flywheel having a rim, said hub comprising: bar means, each being generally flat sided and comprising generally unidirectional filamentary material embedded in a matrix; a first plurality of said bar means positioned in generally parallel alignment in a first orientation; a second plurality of said bar means positioned in generally parallel alignment in a second orientation and interdigitated between the bars of said first plurality; and means for securing said first and second pluralities of bar means in a unitary structure with the flat sides of adjacent bar means in engagement and the filamentary material of each of said bar means generally radially aligned.
Claim 2
Dependent Claim
109 words
An improved hub for a flywheel having a rim, said hub comprising: bar means, each being generally flat sided and comprising generally unidirectional filamentary material embedded in a matrix; a first plurality of said bar means positioned in generally parallel alignment in a first orientation; a second plurality of said bar means positioned in generally parallel alignment in a second orientation and interdigitated between the bars of said first plurality; and means for securing said first and second pluralities of bar means in a unitary structure with the flat sides of adjacent bar means in engagement and the filamentary material of each of said bar means generally radially aligned.
Claim 3
Dependent Claim
26 words
An improved hub means as in claim 1 wherein said first and second plurality of bar means are oriented substantially at right angles to each other.
Claim 4
Dependent Claim
46 words
A hub as in claim 1 wherein said first and second pluralities of bar means traverse each other and said securing means comprises: end plate means positioned at opposed ends of said hub at said intersection; and means for holding said end plate means in compression.
Claim 5
Dependent Claim
25 words
A hub as in claim 3 wherein said holding means comprises a plurality of elongated members having end portions secured to said end plate means.
Claim 6
Dependent Claim
15 words
A hub as in claim 4 wherein each of said elongated member comprises a bolt.
Claim 7
Dependent Claim
44 words
A hub as in claim 4 wherein the intersection of said pluralities of bar means causes sides of said bar means to form a plurality of angles, each having an apex, and each of said elongated members is positioned in one of said apices.
Claim 8
Dependent Claim
19 words
A hub as in claim 6 including lashing means wound around said elongated members and between said bar means.
Claim 9
Dependent Claim
25 words
A hub as in claim 1 wherein said filamentary material comprises a fiber selected from the group consisting of fiberglass, Kevlar and high strength graphite.
Claim 10
Dependent Claim
16 words
A hub as in claim 1 or 8 wherein said matrix material comprises an epoxy resin.
Claim 11
Dependent Claim
17 words
A hub as in claim 3 including axle means extending from each of said end plate means.
Claim 12
Dependent Claim
19 words
A hub as in claim 10 wherein said axle means are aligned with said intersection of said bar means.
Claim 13
Dependent Claim
99 words
A flywheel comprising: a plurality of bar means, each having ends and a substantially uniform cross section and formed of substantially parallel filamentary material embedded in a matrix in a generally longitudinal orientation within the bar means, said bar means being stacked with a first set thereof extending in a first direction and a second set thereof extending in a second direction, each of said bar means engaging its adjacent bar means at a central portion thereof; means for securing said stacked bar means in a unitary structure; and rim means mounted on the ends of said bar means.
Claim 14
Dependent Claim
99 words
A flywheel comprising: a plurality of bar means, each having ends and a substantially uniform cross section and formed of substantially parallel filamentary material embedded in a matrix in a generally longitudinal orientation within the bar means, said bar means being stacked with a first set thereof extending in a first direction and a second set thereof extending in a second direction, each of said bar means engaging its adjacent bar means at a central portion thereof; means for securing said stacked bar means in a unitary structure; and rim means mounted on the ends of said bar means.
Claim 15
Dependent Claim
44 words
A flywheel as in claim 12 wherein said securing means comprises: end plate means positioned at opposed ends of said stack of bar means, each engaging the central portion of its adjacent bar means; and means for holding said end plate means in compression.
Claim 16
Dependent Claim
25 words
A flywheel as in claim 13 wherein said holding means comprises a plurality of elongated members having end portions secured to said end plate means.
Claim 17
Dependent Claim
18 words
A flywheel as in claim 14 wherein said elongated members are positioned adjacent said bar means central portions.
Claim 18
Dependent Claim
22 words
A flywheel as in claims 14 or 15 including lashing means wound around said elongated members and between said stacked bar means.
Claim 19
Dependent Claim
25 words
A flywheel as in claim 12 wherein said filamentary material comprises a fiber selected from the group consisting of fiberglass, Kevlar and high strength graphite.
Claim 20
Dependent Claim
16 words
A flywheel as in claims 12 or 17 wherein said matrix material comprise an epoxy resin.
Claim 21
Dependent Claim
26 words
A flywheel as in claim 13 including axle means extending from each of said end plate means in axial alignment with said bar means central portions.
Claim 22
Dependent Claim
20 words
A flywheel as in claims 12 or 17 wherein said rim means comprises circumferentially wound filamentary material in a matrix.
Claim 23
Dependent Claim
15 words
A flywheel as in claim 20 wherein said rim means has a plurality of layers.
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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) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |