US3602067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flywheel
Assignee: RTX Corp
•
Filing: 1969-09-18
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Granted: 1971-08-31
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Expires: 1989-09-18
Abstract
Abstract A rotary device, for example, a flywheel, is built up of a plurality of layers of circumferentially extending high strength filaments embedded in a matrix with the matrix fraction or matrix composition controlled such that the modulus ratio, that is the ratio of the modulus of elasticity in the circumferential direction, to the modulus of elasticity in the radial direction may be controlled to produce the most effective high energy wheel. By effective control of the modulus ratio a flywheel type of device of very high energy may be produced that will not fail prematurely in the conventional burst-type of failure, i.e., a failure by radial cracking resulting from overstressing in a circumferential direction. In effect, the control of the modulus ratio is a balancing of the strength distribution with the stress distribution.
Inventors
- 👤 Arthur E Wetherbee Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:56
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/30; F16F15/305; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2121; Y10T74/2132
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
A rotary structure such as a high-energy, high-speed flywheel consisting of continuous circumferentially extending filaments or the like, and a matrix filling the voids among the filaments, at least one characteristic of the matrix varying between inner and outer diameters of the structure to provide a controlled strength gradient and modulus ratio from inner to outer radius such characteristics being matrix material, proportion of matrix to filament, and matrix cure.
Claim 2
Dependent Claim
70 words
A rotary structure such as a high-energy, high-speed flywheel consisting of continuous circumferentially extending filaments or the like, and a matrix filling the voids among the filaments, at least one characteristic of the matrix varying between inner and outer diameters of the structure to provide a controlled strength gradient and modulus ratio from inner to outer radius such characteristics being matrix material, proportion of matrix to filament, and matrix cure.
Claim 3
Dependent Claim
24 words
A structure as in claim 1 in which the matrix control is effected by varying the proportion of matrix to filaments at different radii.
Claim 4
Dependent Claim
25 words
A structure as in claim 1 in which the matrix control is effected by varying the material of the matrix from inner to outer radius.
Claim 5
Dependent Claim
32 words
A structure as in claim 1 in which the matrix is a curable material and the matrix control is effected by varying the curing of the material between inner and outer radii.
Claim 6
Dependent Claim
17 words
A structure as in claim 1 in which the filaments also vary from inner to outer diameter.
Claim 7
Dependent Claim
70 words
A rotary structure such as a flywheel having a plurality of substantially concentric, circumferentially continuous filaments, and a matrix bonding said filaments into a wheel, the matrix changing between inner and outer radius of the wheel in at least one of the characteristics of matrix material, proportion of matrix to filament, or matrix cure, thereby to change the strength-strain characteristics of the composite of filaments and matrix at different diameters.
Claim 8
Dependent Claim
70 words
A rotary structure such as a flywheel having a plurality of substantially concentric, circumferentially continuous filaments, and a matrix bonding said filaments into a wheel, the matrix changing between inner and outer radius of the wheel in at least one of the characteristics of matrix material, proportion of matrix to filament, or matrix cure, thereby to change the strength-strain characteristics of the composite of filaments and matrix at different diameters.
Claim 9
Dependent Claim
18 words
A rotary structure as in claim 6 in which the filament material is also varied at different radii.
References Cited (Backward Citations)
US3363479A
Cited
US3296886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |