US3788162A
Expired / Lapsed
US
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Pseudo-isotropic filament disk structures
Assignee: Johns Hopkins University
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Filing: 1972-05-31
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Granted: 1974-01-29
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Expires: 1992-05-31
Abstract
Abstract The invention relates to inertial energy storage devices comprised of anisotropic filamentary elements and comprises several embodiments of a disc flywheel which, although consisting essentially of anisotropic elements, is effectively isotropic in total structural character. A preferred embodiment of the invention is generally formed by orienting several discrete annular layers of anisotropic filamentary elements at regular angles to each other, each anisotropic element in any one annular layer being parallel to the remaining elements in said layer. A second embodiment of the invention comprises randomly oriented anisotropic filamentary elements disposed within a rotary disc structure.
Inventors
- 👤 D Rabenhorst
- 👤 J George
- 👤 A Brandt
- 👤 K Darnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:40
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/02; B32B5/12; B32B29/00; B32B29/02; B32B5/22; B32B5/24; B32B5/26; B32B7/00; B32B7/04; B32B7/12; F; F16; F16F; F16F15/00; F16F15/30; B32B2250/00; B32B2250/20; B32B2307/00; B32B2307/70; B32B2307/706; B32B2317/00; B32B2317/16; Y; Y02; Y02E; Y02E60/00; Y02E60/16; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T74/00; Y10T74/21; Y10T74/2117; Y10T74/2119; Y10T74/212
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
54 words
An energy storage structure rotatable about an axis of rotation extending transversely therethrough, the structure comprising a plurality of anisotropic filament-like members, the members being formed into a solid disc and being disposed within the structure in intersecting relation to produce biaxial resistance to the radial and tangential stress pattern acting on the structure.
Claim 2
Dependent Claim
54 words
An energy storage structure rotatable about an axis of rotation extending transversely therethrough, the structure comprising a plurality of anisotropic filament-like members, the members being formed into a solid disc and being disposed within the structure in intersecting relation to produce biaxial resistance to the radial and tangential stress pattern acting on the structure.
Claim 3
Dependent Claim
43 words
The energy storage structure of claim 1, wherein the anisotropic filament-like members are formed into circular plates, the members within any given plate being parallel, and wherein each plate is disposed within the structure at an angle with respect to certain other plates.
Claim 4
Dependent Claim
39 words
The energy storage structure of claim 2, wherein said structure has a symmetrical cross-sectional profile defined by opposed surfaces about the axis of rotation, said structure being relatively thick around said axis and relatively thin about the periphery thereof.
Claim 5
Dependent Claim
44 words
The energy storage structure of claim 3, wherein the surfaces of the symmetrical cross-sectional profile each have the shape of an exponential curve and are symmetrical about a plane extending through the geometrical center of the structure and perpendicular to the axis of rotation.
Claim 6
Dependent Claim
125 words
The energy storage structure of claim 1, wherein said structure is symmetrically contoured in cross-section about said axis of rotation and has a center portion of maximum thickness around said axis and a peripheral end portion of minimum thickness, the center portion of the structure having a cross-sectional thickness diminishing non-uniformly from said maximum to said minimum according to the relation: z Ze kr wherein: z the thickness of the structure taken at a given point on the surface of the structure Z the maximum thickness of the structure r the quotient of the radial distance of the given point from the axis of rotation divided by the radius of the structure k a numerical constant e the base of the natural system of logarithms.
Claim 7
Dependent Claim
16 words
The energy storage structure of claim 5, wherein the numerical constant k is equal to 4.
Claim 8
Dependent Claim
29 words
The energy storage structure of claim 1, wherein the anisotropic filament-like members are randomly oriented within the structure to produce biaxial resistce to the stresses acting on said structure.
Claim 9
Dependent Claim
39 words
The energy storage structure of claim 7, wherein said structure has a symmetrical cross-sectional profile defined by opposed surfaces about the axis of rotation, said structure being relatively thick around said axis and relatively thin about the periphery thereof.
Claim 10
Dependent Claim
135 words
An energy storage structure rotatable about an axis of rotation extending transversely therethrough, the structure comprising plurality of anisotropic filament-like members which are randomly oriented within the structure, the members forming a disc shape which is symmetrically contoured in cross-section about said axis of rotation and having a center portion of maximum thickness arounD said axis and a peripheral end portion of minimum thickness; the center portion of the structure having a cross-sectional thickness diminishing non-uniformly from said maximum to said minimum according to the relation: Z Z1r q wherein: Z the thickness of the structure taken at a given point on the surface of the structure Z1 the thickness at the peripheral end portion of the structure r the radial distance of the given point from the axis of rotation q a numerical constant.
Claim 11
Dependent Claim
135 words
An energy storage structure rotatable about an axis of rotation extending transversely therethrough, the structure comprising plurality of anisotropic filament-like members which are randomly oriented within the structure, the members forming a disc shape which is symmetrically contoured in cross-section about said axis of rotation and having a center portion of maximum thickness arounD said axis and a peripheral end portion of minimum thickness; the center portion of the structure having a cross-sectional thickness diminishing non-uniformly from said maximum to said minimum according to the relation: Z Z1r q wherein: Z the thickness of the structure taken at a given point on the surface of the structure Z1 the thickness at the peripheral end portion of the structure r the radial distance of the given point from the axis of rotation q a numerical constant.
Claim 12
Dependent Claim
33 words
The energy storage structure of claim 9, wherein a dimension Zo is the maximum thickness of the structure at the center portion thereof, wherein Zo/Z1, 10, and wherein the numerical constant q 1.
Claim 13
Dependent Claim
24 words
The energy storage structure of claim 9, and further comprising shaft means, the structure having a central hole for receiving said shaft means therein.
Claim 14
Dependent Claim
56 words
The energy storage structure of claim 7, and having shaft elements affixed to opposite planar surfaces thereof, the structures further comprising integral raised bosses extending from said opposite planar surfaces of the structure, the bosses being disposed along the axis of rotation of the structure and having axial insets disposed therein for receiving the shaft elements.
Claim 15
Dependent Claim
60 words
The energy storage structure of claim 1, and further comprising hub means, the hub means comprising a hub plate disposed on each of the planar surfaces of the structure, shaft elements extending from the center of each hub plate and aligned with the axis of rotation of the structure, and rods extending through the structure and joining said hub plates.
Claim 16
Dependent Claim
36 words
The energy storage structure of claim 1, wherein the anisotropic filament-like members are formed into circular plates, the members within any given plate being randomly oriented, and wherein the plates are bonded together into a disc.
Claim 17
Dependent Claim
107 words
An energy storage structure rotatable about an axis of rotation extending transversely therethrough, the structure comprising a plurality of anisotropic filament-like members. a multiplicity of the members being bonded together into flat solid circular plates and having the longitudinal axis of each member oriented therein substantially parallel to adjacent members, a planar axis of each plate being defined by the longitudinal axis of the member extending through the geometrical center of said plate, the plates being aligned within the structure with their centers lying along the axis of rotation thereof, the planar axis of each plate forming an equal angle with the planar axes of adjacent plates.
Claim 18
Dependent Claim
107 words
An energy storage structure rotatable about an axis of rotation extending transversely therethrough, the structure comprising a plurality of anisotropic filament-like members. a multiplicity of the members being bonded together into flat solid circular plates and having the longitudinal axis of each member oriented therein substantially parallel to adjacent members, a planar axis of each plate being defined by the longitudinal axis of the member extending through the geometrical center of said plate, the plates being aligned within the structure with their centers lying along the axis of rotation thereof, the planar axis of each plate forming an equal angle with the planar axes of adjacent plates.
Claim 19
Dependent Claim
56 words
The energy storage structure of claim 15, wherein each plate at a given distance above a plane taken perpendicular to the axis of rotation of the structure and through the midpoint of said structure is oriented within the structue in the same direction as a corresponding plate located at the same given distance below said plane.
Claim 20
Dependent Claim
55 words
The energy storage structure of claim 16, and wherein the plates are bonded together into a disc shape comprising two opposing surfaces and a circular peripheral edge, the structure being symmetrically contoured in cross-section about said axis of rotation, and having a center portion of maximum thickness and a peripheral edge portion of minimum thickness.
Claim 21
Dependent Claim
32 words
The energy storage structure of claim 15, wherein each plate is comprised of a plurality of layers of the anisotropic filament-like members, the members within each plate being parallel to each other.
Claim 22
Dependent Claim
22 words
The energy storage structure of claim 15, wherein the angle formed by the planar axes of adjacent plates is equal to 60*.
Claim 23
Dependent Claim
22 words
The energy storage structure of claim 15, wherein the angle formed by the planar axes of adjacent plates is equal to 45*.
Claim 24
Dependent Claim
22 words
The energy storage structure of claim 15, wherein the angle formed by the planar axes of adjacent plates is equal to 30*.
Claim 25
Dependent Claim
25 words
The energy storage structure of claim 15, wherein the plates comprise sheets of wood, the filamentary grain of which sheets extend in the same direction.
Claim 26
Dependent Claim
84 words
An energy storage structure rotatable about an axis of rotation extending transversely therethrough, comprising a plurality of flat solid circular plates, each said plate being comprised of mutually parallel anisotropic filament-like members, the plates being aligned within the structure with their centers lying along the axis of rotation thereof, each plate being disposed within the structure at an angle with respect to adjacent plates; and matrix means for bonding the filament-like members within each plate and for bonding the plates into a unitary structure.
Claim 27
Dependent Claim
84 words
An energy storage structure rotatable about an axis of rotation extending transversely therethrough, comprising a plurality of flat solid circular plates, each said plate being comprised of mutually parallel anisotropic filament-like members, the plates being aligned within the structure with their centers lying along the axis of rotation thereof, each plate being disposed within the structure at an angle with respect to adjacent plates; and matrix means for bonding the filament-like members within each plate and for bonding the plates into a unitary structure.
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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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |