US4458400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite material flywheel hub
Assignee: Garrett Corp
•
Filing: 1981-04-13
•
Granted: 1984-07-10
•
Expires: 2001-04-13
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
2026-11-04 06:24
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/30; F16C; F16C15/00; F16C2361/00; F16C2361/55; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49481
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
92 words
A method of constructing a flywheel, said method comprising the steps of: forming a plurality of bar means having substantially uniform cross section of filamentary material embedded in a matrix with the filamentary material generally longitudinally aligned; stacking a plurality of said bar means with central portions of each bar means engaging its adjacent bar means and with the filamentary material of adjacent bar means substantially at right angles to each other; securing said stacked bar means in a unitary structure; and mounting rim means on ends of said stacked bar means.
Claim 2
Independent Claim
92 words
A method of constructing a flywheel, said method comprising the steps of: forming a plurality of bar means having substantially uniform cross section of filamentary material embedded in a matrix with the filamentary material generally longitudinally aligned; stacking a plurality of said bar means with central portions of each bar means engaging its adjacent bar means and with the filamentary material of adjacent bar means substantially at right angles to each other; securing said stacked bar means in a unitary structure; and mounting rim means on ends of said stacked bar means.
Claim 3
Independent Claim
83 words
A method of constructing a flywheel hub, said method comprising the steps of: forming a plurality of bar means having substantially uniform cross section of filamentary material embedded in a matrix with the filamentary material generally longitudinally aligned; stacking a plurality of said bar means with central portions of each bar means engaging its adjacent bar means and with the filamentary material of adjacent bar means substantially at right angles to each other; and securing said stacked bar means in a unitary structure.
Claim 4
Independent Claim
83 words
A method of constructing a flywheel hub, said method comprising the steps of: forming a plurality of bar means having substantially uniform cross section of filamentary material embedded in a matrix with the filamentary material generally longitudinally aligned; stacking a plurality of said bar means with central portions of each bar means engaging its adjacent bar means and with the filamentary material of adjacent bar means substantially at right angles to each other; and securing said stacked bar means in a unitary structure.
Claim 5
Dependent Claim
47 words
The method of claim 1 or 2 wherein the step of forming said bar means comprises: winding filamentary material with an elongated portion in generally parallel orientation; embedding said filamentary material in a matrix; and cutting said matrix embedded filamentary material with said filamentary material longitudinally aligned.
Claim 6
Dependent Claim
20 words
The method of claim 3 including the additional step of trimming end portions of said bar means into arcuate shape.
Claim 7
Dependent Claim
43 words
The method of claim 1 or 2 wherein the step of forming said bar means comprises: positioning filamentary material in generally parallel orientation; embedding said filamentary material in a matrix; and cutting said matrix embedded filamentary material with said filamentary material longitudinally aligned.
Claim 8
Dependent Claim
20 words
The method of claim 5 including the additional step of trimming end portions of said bar means into arcuate shape.
Claim 9
Dependent Claim
37 words
The method of claim 1 or 2 wherein the step of securing said stacked bar means comprises: positioning end plate means at opposed axial ends of said stacked bar means; and inwardly biasing said end plate means.
Claim 10
Dependent Claim
16 words
The method of claim 7 wherein said end plates are inwardly biased by bolts connected therebetween.
Claim 11
Dependent Claim
21 words
The method of claim 8 including the additional step of securing lashing means around said bolts and between said bar means.
Claim 12
Dependent Claim
16 words
The method of claim 9 including the step of curing said stacked and secured bar means.
Claim 13
Dependent Claim
26 words
The method of claim 1 or 2, wherein said filamentary material comprises a fiber selected from the group consisting of fiberglass, Kevlar and high strength graphite.
Claim 14
Dependent Claim
13 words
The method of claim 11 wherein said matrix material comprises an epoxy resin.
Claim 15
Independent Claim
15 words
The method of claims 1 or 2, wherein said matrix material comprises an epoxy resin.
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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |