WO1995009314A1 - Energy storage flywheel device - Google Patents
Energy storage flywheel device Download PDFInfo
- Publication number
- WO1995009314A1 WO1995009314A1 PCT/US1994/008614 US9408614W WO9509314A1 WO 1995009314 A1 WO1995009314 A1 WO 1995009314A1 US 9408614 W US9408614 W US 9408614W WO 9509314 A1 WO9509314 A1 WO 9509314A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- insert
- composite
- fibers
- composite sections
- sections
- Prior art date
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 18
- 239000002131 composite material Substances 0.000 claims abstract description 71
- 239000011156 metal matrix composite Substances 0.000 claims abstract description 14
- 239000000835 fiber Substances 0.000 claims description 29
- 239000011159 matrix material Substances 0.000 claims description 26
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 239000004760 aramid Substances 0.000 claims description 2
- 229920006231 aramid fiber Polymers 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000012783 reinforcing fiber Substances 0.000 claims 3
- 229910052719 titanium Inorganic materials 0.000 claims 3
- 229910052759 nickel Inorganic materials 0.000 claims 1
- 239000000463 material Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/30—Flywheels
- F16F15/305—Flywheels made of plastics, e.g. fibre reinforced plastics [FRP], i.e. characterised by their special construction from such materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C15/00—Construction of rotary bodies to resist centrifugal force
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/55—Flywheel systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/19—Gearing
- Y10T74/1987—Rotary bodies
- Y10T74/19893—Sectional
- Y10T74/19916—Multiple disks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2117—Power generating-type flywheel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2117—Power generating-type flywheel
- Y10T74/2119—Structural detail, e.g., material, configuration, superconductor, discs, laminated, etc.
- Y10T74/212—Containing fiber or filament
Definitions
- the present invention relates generally to a flywheel device and more particularly to an energy storage flywheel device having improved radial strength.
- flywheels have been made of metals such as high strength steel. Steel, however, may not be a suitable material for a flywheel that must store large amounts of energy efficiently. Specific disadvantages of metallic flywheels include the high weight of the flywheel and the potential for dangerous fractures associated with rotating the flywheel at high speeds. In addition, conventional metals are not well suited for high energy flywheels because their high density results in excessive loading during operation at high rim velocities.
- the present invention relates to an energy storage flywheel device that achieves improved flywheel radial strength while maintaining sufficient hoop strength for operation at high speeds.
- One aspect of the invention includes an energy storage flywheel device having a flywheel that includes a plurality of annular shaped composite sections and annular shaped inserts.
- the inserts have a specific radial strength substantially greater than the composite sections' specific radial strength.
- the composite sections and the inserts are alternately stacked such that they have a common axis of rotation. They are bonded to each other such that shear stress is transferred between the composite sections and insert.
- the flywheel may be mounted on a shaft.
- Another aspect of the invention includes a energy storage flywheel device having a flywheel that includes at least one annular shaped metal matrix composite section.
- Figure 1 is a perspective view of an energy storage flywheel device of the present invention.
- Figure 2 is a perspective view of another energy storage flywheel device of the present invention including an insert that has a wedge-shaped cross-section.
- Figure 3 is perspective view of another energy storage flywheel device of the present invention including interlocking features.
- Figure 4 is a perspective view of another energy storage flywheel device of the present invention further including a plurality of apertures filled with a material that bonds the composite sections to each other and the insert.
- the energy storage flywheel device 6 of Fig. 1 achieves greater flywheel radial strength than prior art composite flywheels by alternately stacking a plurality of annular shaped composite sections 8 with at least one annular shaped insert 10.
- each insert 10 may be disposed between two composite sections 8.
- the composite sections 8 may comprise any anisotropic material suitable for flywheel fabrication such as wound fiber reinforced resin matrix composites or metal matrix composites. If the composite is a resin matrix composite, thermosetting or thermoplastic resins are suitable for the matrix. If the composite is a metal matrix composite, metals such as Al, Mg, or Ti may be used as the matrix. Preferably, the metal will be either Al or Mg because of their relatively low densities.
- the composite sections 8 also may comprise any conventional fibers compatible with the matrix. For example, if the matrix is a resin matrix, the fibers may be carbon fibers, glass fibers, aramid fibers, or any other fiber compatible with the matrix.
- the fibers may be graphite fibers, alumina fibers, silicon carbide fibers, boron fibers, or any other fibers compatible with the matrix. If desired, the fibers may be coated to make mem compatible with the matrix.
- the fibers may be oriented in d e matrix in any way that gives the flywheel 6 sufficient hoop strength for a desired application.
- the composite sections 8 should be the major constituent of the flywheel 6 to provide sufficient hoop strength. For example, the composite sections 8 may make up 75% to 98% by volume of the flywheel 6. In some applications in which the composite sections 8 comprise a metal matrix composite, the inserts 10 may be dispensed with entirely and the entire flywheel 6 may be made from the metal matrix composite because of the inherent higher radial strength provided by the metal matrix.
- the insert 10 may comprise any material with a specific radial strength substantially greater than the specific radial strength of the composite sections 8. For purposes of this application, substantially greater means at least 5 times as great. Specific strength is defined as the ratio of the material's strength to its density.
- the insert 10 may be a monolithic metal, a metal matrix composite, or a resin matrix composite.
- the insert will comprise Al, an Al alloy, Ti, a Ti alloy, Ni, a Ni alloy, or steel.
- the insert 10 will be a Ti alloy because of its high radial strength, low density, and low to moderate cost.
- a small percentage of inserts 10 in the flywheel 6 may increase the radial strength substantially, while only slightly decreasing the hoop strength. For example, a flywheel 6 that comprises 5% by volume to 15% by volume of inserts 10 may be suitable for many applications.
- the specific radial elastic modulus of the insert 10 will be greater than the specific radial elastic modulus of the composites sections 8, so that load transfers from the composite sections 8 in the radial direction to the insert 10. This prevents loading of the composite section 8 in the radial direction to the point where failure can occur.
- Specific elastic modulus (or specific stiffness, another term for the same parameter) is defined as the ratio of the material's elastic modulus to its density.
- the specific hoop elastic modulus of me composite sections 8 should be greater than the specific hoop elastic modulus of the insert 10, so that load is transferred from the insert 10 to the composite sections 8 in the hoop direction. This prevents loading of d e insert in the hoop direction to me point where failure can occur.
- the composite sections also should have a specific hoop strength substantially greater than the specific hoop strength of the insert 10.
- the composite sections 8 and insert 10 may be made with any suitable conventional techniques. After fabrication, the composite sections 8 and the insert 10 are alternately stacked such that they have a common axis of rotation. Additionally, the composite sections 8 and insert 10 are bonded together such that shear stress and load are transferred between the composite sections 8 and insert 10.
- any conventionally known method for bonding may be used to bond the composite sections 8 to the insert 10.
- diffusion bonding, mechanical bonding, and adhesive bonding techniques may be employed.
- a combination of any of the above techniques may be suitable.
- an insert 10 with a wedge-shaped cross-section that is thicker at its outer diameter than at its inner diameter may be used to mechanically bond the insert 10 to the composite sections 8.
- the insert 10 and composite sections 8 may be shaped to form interlocking features, such as teeth, that provide a mechanical bond between the insert 10 and composite sections 8.
- Adhesive disposed between the insert 10 and composite sections 8 also may be used to improve me bond between die interlocking teeth.
- the insert 10 may comprise a plurality of apertures 12 filled with adhesive to bond the composite sections 8 to the insert 10.
- these apertures can initially be left unfilled to allow metal to flow between the composite sections 8. After final solidification of the metal matrix composite, metal that flows through the apertures 12 will form an integral metal network that bonds d e composite sections 8 to each other and the insert 10.
- Example 2 illustrates some advantages of die present invention without limiting the invention's broad scope.
- a flywheel may be constructed by sandwiching a plurality of annular shaped inserts comprising an alloy of 6% Al, 4% V, balance Ti between a plurality of annular shaped wound fiber reinforced resin matrix composite sections.
- the composite sections may comprise 50 volume percent (vol%) T800 graphite fiber (Amoco Performance Products, Inc., Atlanta, GA) and 50 vol% epoxy matrix.
- the composite sections and inserts which may be made with any of the conventional techniques described above, may be bonded together wim any of the techniques described above such d at the composite sections comprise 95% by volume of the flywheel and the inserts comprise 5% by volume of the flywheel.
- Table 1 shows properties of the flywheel materials, Ti-6A1-4V and T800/epoxy composite.
- Bonding annular sections of these materials in a flywheel construction such that shear stress is transferred between die composite sections and insert can increase radial strengdi significantly while only slightly decreasing hoop strength.
- Table 2 the addition of the Ti-6A1-4V inserts may result in a 685% improvement in the flywheel radial strength, with only a 3 % decrease in the flywheel hoop strength.
- the overall volume percent and number of the Ti-6A1-4V inserts could be tailored to meet specific design and fabrication requirements.
- die present invention includes a light weight, energy storage flywheel device having greater radial strengdi than prior art composite flywheels while maintaining sufficient hoop strength for operation at high speeds.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Laminated Bodies (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Vibration Dampers (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP94924080A EP0719392B1 (en) | 1993-09-29 | 1994-08-01 | Energy storage flywheel device |
| DE69414717T DE69414717T2 (de) | 1993-09-29 | 1994-08-01 | Schwungrad für energiespeicher |
| JP7510286A JPH09503044A (ja) | 1993-09-29 | 1994-08-01 | エネルギー蓄積フライホイール装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/128,319 | 1993-09-29 | ||
| US08/128,319 US5452625A (en) | 1993-09-29 | 1993-09-29 | Energy storage flywheel device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1995009314A1 true WO1995009314A1 (en) | 1995-04-06 |
Family
ID=22434757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1994/008614 WO1995009314A1 (en) | 1993-09-29 | 1994-08-01 | Energy storage flywheel device |
Country Status (8)
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5692414A (en) * | 1994-12-23 | 1997-12-02 | Hughes Aircraft Company | Flywheel having reduced radial stress |
| US5732603A (en) * | 1996-03-08 | 1998-03-31 | Hughes Electronics | Flywheel with expansion-matched, self-balancing hub |
| US5778736A (en) * | 1996-06-12 | 1998-07-14 | Dow-United Technologies Composite Products, Inc. | Spiral woven composite flywheel rim |
| US5784926A (en) * | 1996-08-27 | 1998-07-28 | Dow-United Technologies Composite Products, Inc. | Integral composite flywheel rim and hub |
| US6044726A (en) * | 1997-06-30 | 2000-04-04 | Lockheed Martin Energy Research Corporation | Optimum rotationally symmetric shells for flywheel rotors |
| US7263912B1 (en) * | 1999-08-19 | 2007-09-04 | Toray Composites (America), Inc. | Flywheel hub-to-rim coupling |
| US6633106B1 (en) * | 1999-09-30 | 2003-10-14 | Dwight W. Swett | Axial gap motor-generator for high speed operation |
| PT1191253E (pt) * | 2000-09-11 | 2012-01-25 | Toray Industries | Método de fabrico de alta velocidade para volante compósito |
| AU2001296595A1 (en) * | 2000-10-02 | 2002-04-15 | Indigo Energy, Inc. | Stacked disc flywheel |
| US6722228B1 (en) | 2000-12-28 | 2004-04-20 | Curt Wilkinson | Flywheel and method and apparatus for manufacturing flywheels |
| US6818807B2 (en) * | 2001-08-06 | 2004-11-16 | Bayer Bioscience N.V. | Herbicide tolerant cotton plants having event EE-GH1 |
| US20060024489A1 (en) * | 2004-07-29 | 2006-02-02 | 3M Innovative Properties Company | Metal matrix composites, and methods for making the same |
| US20060024490A1 (en) * | 2004-07-29 | 2006-02-02 | 3M Innovative Properties Company | Metal matrix composites, and methods for making the same |
| US20060021729A1 (en) * | 2004-07-29 | 2006-02-02 | 3M Innovative Properties Company | Metal matrix composites, and methods for making the same |
| US8079833B2 (en) * | 2005-07-29 | 2011-12-20 | Ksb Aktiengesellschaft | Electric motor having a coaxially associated pump |
| US7880278B2 (en) | 2006-05-16 | 2011-02-01 | Taiwan Semiconductor Manufacturing Company, Ltd. | Integrated circuit having stress tuning layer |
| CN103502685A (zh) | 2010-09-14 | 2014-01-08 | 动力树公司 | 复合式飞轮 |
| GB201116109D0 (en) * | 2011-09-18 | 2011-11-02 | Univ City | Flywheel assembly |
| EP2698557B1 (de) * | 2012-08-14 | 2014-10-29 | Enrichment Technology Company Ltd. | Schwungrad-Energiespeicher |
| ES2688126T3 (es) * | 2013-03-07 | 2018-10-31 | Mario H. GOTTFRIED | Sistema de volante de inercia cónico de alta velocidad |
| US8978513B2 (en) * | 2013-03-15 | 2015-03-17 | Paul Prober | Energy storing flywheel and bearing assembly |
| US10050491B2 (en) | 2014-12-02 | 2018-08-14 | Management Services Group, Inc. | Devices and methods for increasing energy and/or power density in composite flywheel energy storage systems |
| CN110748603B (zh) * | 2019-12-26 | 2020-04-10 | 沈阳微控新能源技术有限公司 | 一种高疲劳寿命飞轮和飞轮储能系统 |
| CN113241894A (zh) * | 2021-05-31 | 2021-08-10 | 中国科学院工程热物理研究所 | 一种飞轮及储能系统 |
| IL289441B2 (en) * | 2021-12-27 | 2023-04-01 | Zooz Power Ltd | Flywheel system |
| WO2023161638A1 (en) * | 2022-02-23 | 2023-08-31 | Levistor Ltd | Flywheel |
| WO2024180152A1 (en) * | 2023-02-28 | 2024-09-06 | Levistor Ltd | Flywheel |
| GB2627769B (en) * | 2023-02-28 | 2025-06-25 | Levistor Ltd | Flywheel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3296886A (en) * | 1965-01-12 | 1967-01-10 | Jr Theodore J Reinhart | Laminated rotary structures |
| US4000665A (en) * | 1975-08-26 | 1977-01-04 | The Johns Hopkins University | Woven filament rotor structure |
| US4186245A (en) * | 1978-09-28 | 1980-01-29 | Allied Chemical Corporation | Energy storage flywheel |
| US4207778A (en) * | 1976-07-19 | 1980-06-17 | General Electric Company | Reinforced cross-ply composite flywheel and method for making same |
| JPS6131739A (ja) * | 1984-07-23 | 1986-02-14 | Hitachi Ltd | フライホイ−ル |
| US4697324A (en) * | 1984-12-06 | 1987-10-06 | Avco Corporation | Filamentary structural module for composites |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1707135A (en) * | 1927-10-28 | 1929-03-26 | Sprucolite Corp Inc | Compressed laminated fibrous product and process of making the same |
| US3409489A (en) * | 1964-11-10 | 1968-11-05 | Torrington Mfg Co | Method of making resilient hub assembly |
| US3410772A (en) * | 1965-05-28 | 1968-11-12 | Navy Usa | Method for attaching impressed current anodes for cathodic protection |
| US3788162A (en) * | 1972-05-31 | 1974-01-29 | Univ Johns Hopkins | Pseudo-isotropic filament disk structures |
| US4102221A (en) * | 1976-07-19 | 1978-07-25 | General Electric Company | Cross-ply composite flywheel |
| JPS6041136B2 (ja) * | 1976-09-01 | 1985-09-14 | 財団法人特殊無機材料研究所 | シリコンカ−バイド繊維強化軽金属複合材料の製造方法 |
| US4370899A (en) * | 1978-09-13 | 1983-02-01 | U.S. Flywheels, Inc. | Flywheel for kinetic energy storage |
| US4266442A (en) * | 1979-04-25 | 1981-05-12 | General Electric Company | Flywheel including a cross-ply composite core and a relatively thick composite rim |
| FR2503808A1 (fr) * | 1981-04-14 | 1982-10-15 | Aerospatiale | Procede de realisation d'un rotor a haute vitesse et rotor mettant en oeuvre ledit procede |
| US4413860A (en) * | 1981-10-26 | 1983-11-08 | Great Lakes Carbon Corporation | Composite disc |
| US4481840A (en) * | 1981-12-02 | 1984-11-13 | The United States Of America As Represented By The United States Department Of Energy | Layered flywheel with stress reducing construction |
| US4606558A (en) * | 1984-02-10 | 1986-08-19 | Davidson John H C | Plastic pipe fitting |
| US4538079A (en) * | 1984-04-16 | 1985-08-27 | Mitsubishi Denki Kabushiki Kaisha | Flywheel device with compensation for non parallel plates |
| US4629664A (en) * | 1984-10-31 | 1986-12-16 | Hitachi, Ltd. | Liquid fuel cell |
| US4629644A (en) * | 1985-09-30 | 1986-12-16 | United Technologies Corporation | Filament wound structure having filament wound reinforcing rings for use as a torque drive |
| JPH0534341Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1988-06-03 | 1993-08-31 | ||
| US5012694A (en) * | 1990-01-29 | 1991-05-07 | The United States Of America As Represented By The Department Of Energy | High speed flywheel |
-
1993
- 1993-09-29 US US08/128,319 patent/US5452625A/en not_active Expired - Fee Related
-
1994
- 1994-08-01 EP EP94924080A patent/EP0719392B1/en not_active Expired - Lifetime
- 1994-08-01 ES ES94924080T patent/ES2126133T3/es not_active Expired - Lifetime
- 1994-08-01 JP JP7510286A patent/JPH09503044A/ja active Pending
- 1994-08-01 WO PCT/US1994/008614 patent/WO1995009314A1/en active IP Right Grant
- 1994-08-01 DE DE69414717T patent/DE69414717T2/de not_active Expired - Fee Related
- 1994-08-01 CA CA002170617A patent/CA2170617A1/en not_active Abandoned
- 1994-08-09 TW TW083107260A patent/TW251338B/zh active
-
1995
- 1995-06-07 US US08/487,878 patent/US5586471A/en not_active Expired - Fee Related
- 1995-06-07 US US08/487,879 patent/US5590569A/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3296886A (en) * | 1965-01-12 | 1967-01-10 | Jr Theodore J Reinhart | Laminated rotary structures |
| US4000665A (en) * | 1975-08-26 | 1977-01-04 | The Johns Hopkins University | Woven filament rotor structure |
| US4207778A (en) * | 1976-07-19 | 1980-06-17 | General Electric Company | Reinforced cross-ply composite flywheel and method for making same |
| US4186245A (en) * | 1978-09-28 | 1980-01-29 | Allied Chemical Corporation | Energy storage flywheel |
| JPS6131739A (ja) * | 1984-07-23 | 1986-02-14 | Hitachi Ltd | フライホイ−ル |
| US4697324A (en) * | 1984-12-06 | 1987-10-06 | Avco Corporation | Filamentary structural module for composites |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 10, no. 189 (M - 494)<2245> 3 July 1986 (1986-07-03) * |
Also Published As
| Publication number | Publication date |
|---|---|
| US5590569A (en) | 1997-01-07 |
| EP0719392B1 (en) | 1998-11-18 |
| CA2170617A1 (en) | 1995-04-06 |
| DE69414717D1 (de) | 1998-12-24 |
| US5586471A (en) | 1996-12-24 |
| DE69414717T2 (de) | 1999-04-22 |
| ES2126133T3 (es) | 1999-03-16 |
| JPH09503044A (ja) | 1997-03-25 |
| EP0719392A1 (en) | 1996-07-03 |
| TW251338B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1995-07-11 |
| US5452625A (en) | 1995-09-26 |
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