FR2415729A1 - Appareil pour augmenter le debit d'agent et en recuperer l'energie cinetique - Google Patents
Appareil pour augmenter le debit d'agent et en recuperer l'energie cinetiqueInfo
- Publication number
- FR2415729A1 FR2415729A1 FR7902187A FR7902187A FR2415729A1 FR 2415729 A1 FR2415729 A1 FR 2415729A1 FR 7902187 A FR7902187 A FR 7902187A FR 7902187 A FR7902187 A FR 7902187A FR 2415729 A1 FR2415729 A1 FR 2415729A1
- Authority
- FR
- France
- Prior art keywords
- recovering
- increasing
- kinetic energy
- agent
- steps
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/04—Wind motors with rotation axis substantially parallel to the air flow entering the rotor having stationary wind-guiding means, e.g. with shrouds or channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/10—Stators
- F05B2240/13—Stators to collect or cause flow towards or away from turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/10—Stators
- F05B2240/13—Stators to collect or cause flow towards or away from turbines
- F05B2240/133—Stators to collect or cause flow towards or away from turbines with a convergent-divergent guiding structure, e.g. a Venturi conduit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2250/00—Geometry
- F05B2250/50—Inlet or outlet
- F05B2250/501—Inlet
- F05B2250/5011—Inlet augmenting, i.e. with intercepting fluid flow cross sectional area greater than the rest of the machine behind the inlet
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S415/00—Rotary kinetic fluid motors or pumps
- Y10S415/905—Natural fluid current motor
- Y10S415/908—Axial flow runner
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Hydraulic Turbines (AREA)
Abstract
L'invention est relative à un appareil destiné à augmenter le débit d'un agent. Il comprend une série d'organes tubulaires adjacents 1-4 avec des axes longitudinaux coïncidant, la superficie en section transversale de ces organes diminuant en gradins dans le sens d'écoulement de l'agent et les transitions entre les gradins 7-9 étant incurvées aérodynamiquement pour maintenir un écoulement laminaire maximum, tandis que l'agent turbulent est évacué à travers des fentes annulaires 13-15 situées à l'endroit des gradins. Utilisation dans le domaine de la récupération de l'énergie cinétique d'un agent en mouvement.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7801112A SE7801112L (sv) | 1978-01-30 | 1978-01-30 | Accelerator |
SE7900241A SE434977B (sv) | 1979-01-10 | 1979-01-10 | Anordning for okning av stromningshastigheten i ett vetske- eller gasformigt medium |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2415729A1 true FR2415729A1 (fr) | 1979-08-24 |
FR2415729B1 FR2415729B1 (fr) | 1984-11-09 |
Family
ID=26656968
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7902187A Granted FR2415729A1 (fr) | 1978-01-30 | 1979-01-29 | Appareil pour augmenter le debit d'agent et en recuperer l'energie cinetique |
Country Status (11)
Country | Link |
---|---|
US (1) | US4320304A (fr) |
JP (1) | JPS54141932A (fr) |
AU (1) | AU561099B2 (fr) |
DE (1) | DE2902830A1 (fr) |
DK (1) | DK36279A (fr) |
ES (1) | ES477284A1 (fr) |
FR (1) | FR2415729A1 (fr) |
GB (1) | GB2013790B (fr) |
IT (1) | IT1166600B (fr) |
NL (1) | NL7900592A (fr) |
SU (1) | SU1218930A3 (fr) |
Families Citing this family (81)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE430529B (sv) * | 1982-12-30 | 1983-11-21 | Vindkraft Goeteborg Kb | Anordning vid vindturbiner |
US4482290A (en) * | 1983-03-02 | 1984-11-13 | The United States Of America As Represented By The United States Department Of Energy | Diffuser for augmenting a wind turbine |
US4600360A (en) * | 1984-06-25 | 1986-07-15 | Quarterman Edward A | Wind driven turbine generator |
US4781523A (en) * | 1987-06-01 | 1988-11-01 | Aylor Elmo E | Fluid energy turbine |
WO1991019170A1 (fr) * | 1990-06-04 | 1991-12-12 | Mcpherson's Limited | Detecteur de debit et systeme de commande |
US5836738A (en) * | 1993-06-02 | 1998-11-17 | Finney; Clifton D. | Advanced superventuri power source |
US5464320A (en) * | 1993-06-02 | 1995-11-07 | Finney; Clifton D. | Superventuri power source |
GB2292775B (en) * | 1994-09-01 | 1999-01-06 | Zeta Dynamics Ltd | Fluid flow device |
US5656865A (en) * | 1995-09-20 | 1997-08-12 | Evans; Franklin T. | Wind conversion unit having cup shaped flow through blades and a centrifugal speed regulator |
WO1997041351A1 (fr) * | 1996-04-30 | 1997-11-06 | Mezhdunarodny Fond Konversii | Procede de transformation de l'energie de flux d'air et dispositif de mise en oeuvre de ce procede |
US6440600B1 (en) | 1997-05-08 | 2002-08-27 | Michael E. Starzak | Apparatus and method for generating electrical power from fluid flow through charged pores |
JP3584704B2 (ja) * | 1997-10-24 | 2004-11-04 | 昭和風力機械株式会社 | 送風機の吸込流予旋回制御バイパス構造 |
RU2124142C1 (ru) * | 1998-03-25 | 1998-12-27 | Орлов Игорь Сергеевич | Ветроэнергетическая установка |
DE10036307A1 (de) * | 2000-07-26 | 2002-02-21 | Alstom Power Nv | Vorrichtung zur Ausnutzung der kinetischen Energie einer strömenden Flüssigkeit zur Stromerzeugung |
GB0123802D0 (en) * | 2001-10-04 | 2001-11-21 | Rotech Holdings Ltd | Power generator and turbine unit |
US6836028B2 (en) * | 2001-10-29 | 2004-12-28 | Frontier Engineer Products | Segmented arc generator |
EP1359320A1 (fr) * | 2002-04-10 | 2003-11-05 | Hans Grassmann | Turbine à écoulement fluidique carénée |
GB2390890B (en) * | 2002-07-17 | 2005-07-06 | Rolls Royce Plc | Diffuser for gas turbine engine |
US6843059B2 (en) * | 2002-11-19 | 2005-01-18 | General Electric Company | Combustor inlet diffuser with boundary layer blowing |
CA2452965A1 (fr) * | 2003-12-31 | 2005-06-30 | Bud T. J. Johnson | Configuration de moteur a turbine-rotor horizontal actionnes par l'energie eolienne |
CA2452967A1 (fr) * | 2003-12-31 | 2005-06-30 | Bud T. J. Johnson | Configuration de moteur a turbine-deflecteur spherique actionnes par l'energie eolienne |
US6887031B1 (en) * | 2004-03-16 | 2005-05-03 | Angus J. Tocher | Habitat friendly, pressure conversion, wind energy extraction |
US7220096B2 (en) * | 2004-03-16 | 2007-05-22 | Tocher Angus J | Habitat friendly, multiple impellor, wind energy extraction |
CA2467199A1 (fr) * | 2004-05-19 | 2005-11-19 | Bud T.J. Johnson | Eolienne |
US7214029B2 (en) * | 2004-07-01 | 2007-05-08 | Richter Donald L | Laminar air turbine |
US7172386B2 (en) * | 2004-08-05 | 2007-02-06 | Minh-Hoang Dinh Truong | Wind and solar power plant with variable high speed rotor trains |
CA2481820C (fr) * | 2004-09-17 | 2009-09-01 | Clean Current Power Systems Incorporated | Augmentation de debit pour turbogeneratrice sous-marine |
US20060067825A1 (en) * | 2004-09-27 | 2006-03-30 | Kilaras Michael S | Aerovortex mill |
US20080247860A1 (en) * | 2007-04-06 | 2008-10-09 | Timothy Cresci | Hydroelectric power plant and method of generating power |
US8021100B2 (en) * | 2007-03-23 | 2011-09-20 | Flodesign Wind Turbine Corporation | Wind turbine with mixers and ejectors |
US20110250053A1 (en) * | 2007-03-23 | 2011-10-13 | Presz Jr Walter M | Fluid turbines |
US20100028132A2 (en) * | 2007-03-23 | 2010-02-04 | Flodesign Wind Turbine Corporation | Wind turbine with mixers and ejectors |
US20110008164A1 (en) * | 2007-03-23 | 2011-01-13 | Flodesign Wind Turbine Corporation | Wind turbine |
US8376686B2 (en) * | 2007-03-23 | 2013-02-19 | Flodesign Wind Turbine Corp. | Water turbines with mixers and ejectors |
US20090230691A1 (en) * | 2007-03-23 | 2009-09-17 | Presz Jr Walter M | Wind turbine with mixers and ejectors |
US8714923B2 (en) * | 2007-03-23 | 2014-05-06 | Ogin, Inc. | Fluid turbine |
US20110027067A1 (en) * | 2007-03-23 | 2011-02-03 | Flodesign Wind Turbine Corporation | Coated shrouded wind turbine |
US20110020107A1 (en) * | 2007-03-23 | 2011-01-27 | Flodesign Wind Turbine Corporation | Molded wind turbine shroud segments and constructions for shrouds |
US20100284802A1 (en) * | 2007-03-23 | 2010-11-11 | Flodesign Wind Turbine Corporation | Inflatable wind turbine |
US8622688B2 (en) * | 2007-03-23 | 2014-01-07 | Flodesign Wind Turbine Corp. | Fluid turbine |
US20110002781A1 (en) * | 2007-03-23 | 2011-01-06 | Flodesign Wind Turbine Corporation | Wind turbine with pressure profile and method of making same |
US20100314885A1 (en) * | 2007-03-23 | 2010-12-16 | Flodesign Wind Turbine Corporation | Shrouded wind turbine with rim generator and halbach array |
US20100316493A1 (en) * | 2007-03-23 | 2010-12-16 | Flodesign Wind Turbine Corporation | Turbine with mixers and ejectors |
US20110014038A1 (en) * | 2007-03-23 | 2011-01-20 | Flodesign Wind Turbine Corporation | Wind turbine with skeleton-and-skin structure |
US8393850B2 (en) * | 2008-09-08 | 2013-03-12 | Flodesign Wind Turbine Corp. | Inflatable wind turbine |
US8657572B2 (en) | 2007-03-23 | 2014-02-25 | Flodesign Wind Turbine Corp. | Nacelle configurations for a shrouded wind turbine |
US20080240916A1 (en) * | 2007-03-27 | 2008-10-02 | Krouse Wayne F | System and apparatus for improved turbine pressure and pressure drop control |
AT505351B1 (de) * | 2007-04-05 | 2009-03-15 | Hermann Olschnegger | Windrad |
GB2463176B (en) * | 2007-05-05 | 2013-03-13 | Gordon David Sherrer | System and method for extracting power from fluid |
US7525211B2 (en) * | 2007-06-19 | 2009-04-28 | Marvin Russell H | Control system for twin turbine wind power generating system |
RU2345246C1 (ru) * | 2007-08-20 | 2009-01-27 | Артер Текнолоджи Лимитед | Ветроэнергетическая установка |
US8937399B2 (en) * | 2007-12-10 | 2015-01-20 | V Squared Wind, Inc. | Efficient systems and methods for construction and operation of mobile wind power platforms |
DE202007017544U1 (de) * | 2007-12-13 | 2009-04-23 | Schiller, Helmut | Unterwasser Turbine |
US20090180869A1 (en) * | 2008-01-16 | 2009-07-16 | Brock Gerald E | Inlet wind suppressor assembly |
KR20110044828A (ko) | 2008-09-23 | 2011-05-02 | 프로디자인 윈드 터빈 코포레이션 | 믹서 및 이젝터를 가진 풍력 터빈 |
CN102388220B (zh) | 2009-03-30 | 2014-11-05 | 奥金公司 | 分段式风力涡轮机 |
PE20121194A1 (es) * | 2009-06-19 | 2012-09-13 | New World Energy Entpr Ltd | Un sistema de mejora de presion controlada para una turbina eolica |
US8461713B2 (en) * | 2009-06-22 | 2013-06-11 | Johann Quincy Sammy | Adaptive control ducted compound wind turbine |
IT1396927B1 (it) * | 2009-11-13 | 2012-12-20 | Alfonsi | Turbina ad elevate prestazioni, particolarmente a potenza specifica incrementata. |
WO2011159374A2 (fr) * | 2010-03-08 | 2011-12-22 | The Penn State Research Foundation | Ventilateur à double conduite |
EP2564054A1 (fr) | 2010-04-30 | 2013-03-06 | Clean Current Limited Partnership | Turbine hydraulique unidirectionnelle avec conduit, pales et générateur améliorés |
US8829706B1 (en) * | 2010-06-21 | 2014-09-09 | Johann Quincy Sammy | Adaptive control ducted compound wind turbine |
US20120175882A1 (en) * | 2011-01-10 | 2012-07-12 | Peter John Sterling | Injector venturi accelerated, wind turbine |
CN104204509A (zh) * | 2011-12-12 | 2014-12-10 | 英德集团 | 水力涡轮机 |
TW201326542A (zh) * | 2011-12-19 | 2013-07-01 | Univ Nat Pingtung Sci & Tech | 風能蒐集器 |
AT512418A1 (de) * | 2012-02-14 | 2013-08-15 | Schneeweiss Hans | Freistrom-turbinenanlage |
GB2503250B (en) * | 2012-06-20 | 2015-05-27 | Verderg Ltd | Apparatus for converting energy from fluid flow |
KR101442740B1 (ko) * | 2013-05-20 | 2014-09-22 | 한국해양과학기술원 | 조류발전용 디퓨져 제어장치 |
TWI573935B (zh) * | 2013-11-22 | 2017-03-11 | 國立臺灣海洋大學 | 利用邊界層控制的單向雙層導罩的海流發電裝置 |
US20150260155A1 (en) * | 2014-03-12 | 2015-09-17 | Phillip Ridings | Wind turbine generator |
WO2015149811A1 (fr) * | 2014-03-31 | 2015-10-08 | Volu Ventis Aps | Diffuseur, utilisation d'un diffuseur et éolienne comprenant un diffuseur |
GB2524782B (en) | 2014-04-02 | 2016-04-20 | Verderg Ltd | Turbine assembly |
GB2541507A (en) * | 2015-06-18 | 2017-02-22 | New World Energy Entpr Ltd | A wind turbine with rotating augmentor |
US10197038B2 (en) * | 2015-09-18 | 2019-02-05 | Charles B. Culpepper | Helical longitudinal blade turbine system including a funnel throat valve comprising a plurality of semi-circular valve plates |
US9759179B2 (en) * | 2015-09-18 | 2017-09-12 | Charles B. Culpepper | Hydroelectric generator system including helical longitudinal blades forming an open bore and aligned with a current direction |
US9784244B1 (en) * | 2017-03-29 | 2017-10-10 | Tarek O. Souryal | Energy collection pod |
CN108979948B (zh) * | 2018-07-24 | 2019-07-30 | 李素梅 | 一种电动汽车用空气放大器 |
US11105367B2 (en) | 2019-01-18 | 2021-08-31 | Telesystem Energy Ltd. | Passive magnetic bearing and rotating machineries integrating said bearing, including energy production turbines |
EP3938646B1 (fr) | 2019-03-14 | 2024-02-21 | Télésystème Énergie Ltée. | Capot multi-étagé pour une turbine hydrocinétique |
IT201900022923A1 (it) | 2019-12-04 | 2021-06-04 | Univ Della Calabria | Turbina ibrida ad elevate prestazioni |
WO2021215901A1 (fr) * | 2020-04-22 | 2021-10-28 | Товарищество С Ограниченной Ответственностью "Water Energy" | Centrale hydroélectrique |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB192793A (en) * | 1921-11-11 | 1923-02-12 | Georg Arthur Schlotter | Improvements in and relating to turbines |
FR866053A (fr) * | 1940-02-27 | 1941-06-16 | Dispositif de conduites d'air créant des pressions et des dépressions pour l'amélioration du rendement des moteurs à vent | |
FR2295256A1 (fr) * | 1974-12-19 | 1976-07-16 | Sachot Roland | Recepteur aerodynamique |
US4021135A (en) * | 1975-10-09 | 1977-05-03 | Pedersen Nicholas F | Wind turbine |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE729834C (de) * | 1937-12-17 | 1942-12-23 | Richard Hagemann | Form zur Herstellung von Gummireifen mit Hohlraeumen |
DE729534C (de) * | 1940-06-18 | 1942-12-17 | Arno Fischer | Windturbinenaggregat |
FR891697A (fr) * | 1942-10-30 | 1944-03-15 | Turbines motrices à rotor réduit | |
ES452096A1 (es) * | 1976-10-04 | 1977-12-01 | Pita Salorio Agustin | Procedimiento para aprovechar energia de presion de un medioexterior constituido por fluido o fluidos. |
JPS53122039A (en) * | 1977-03-31 | 1978-10-25 | Mouton William J Jr | Flowing energy abstracting device of fluid |
-
1979
- 1979-01-24 US US06/006,121 patent/US4320304A/en not_active Expired - Lifetime
- 1979-01-25 NL NL7900592A patent/NL7900592A/xx not_active Application Discontinuation
- 1979-01-25 DE DE19792902830 patent/DE2902830A1/de not_active Withdrawn
- 1979-01-25 AU AU43654/79A patent/AU561099B2/en not_active Ceased
- 1979-01-29 GB GB7903013A patent/GB2013790B/en not_active Expired
- 1979-01-29 IT IT19681/79A patent/IT1166600B/it active
- 1979-01-29 SU SU792732750A patent/SU1218930A3/ru active
- 1979-01-29 DK DK36279A patent/DK36279A/da not_active Application Discontinuation
- 1979-01-29 JP JP904279A patent/JPS54141932A/ja active Pending
- 1979-01-29 FR FR7902187A patent/FR2415729A1/fr active Granted
- 1979-01-30 ES ES477284A patent/ES477284A1/es not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB192793A (en) * | 1921-11-11 | 1923-02-12 | Georg Arthur Schlotter | Improvements in and relating to turbines |
FR866053A (fr) * | 1940-02-27 | 1941-06-16 | Dispositif de conduites d'air créant des pressions et des dépressions pour l'amélioration du rendement des moteurs à vent | |
FR2295256A1 (fr) * | 1974-12-19 | 1976-07-16 | Sachot Roland | Recepteur aerodynamique |
US4021135A (en) * | 1975-10-09 | 1977-05-03 | Pedersen Nicholas F | Wind turbine |
Also Published As
Publication number | Publication date |
---|---|
SU1218930A3 (ru) | 1986-03-15 |
IT7919681A0 (it) | 1979-01-29 |
NL7900592A (nl) | 1979-08-01 |
DK36279A (da) | 1979-07-31 |
FR2415729B1 (fr) | 1984-11-09 |
JPS54141932A (en) | 1979-11-05 |
AU561099B2 (en) | 1987-04-30 |
DE2902830A1 (de) | 1979-08-02 |
GB2013790A (en) | 1979-08-15 |
ES477284A1 (es) | 1979-07-01 |
AU4365479A (en) | 1979-08-09 |
US4320304A (en) | 1982-03-16 |
IT1166600B (it) | 1987-05-05 |
GB2013790B (en) | 1982-03-31 |
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