CA1056284A - Dispositif de necessite sur jante a gorge pour usage temporaire d'un pneu degonfle - Google Patents
Dispositif de necessite sur jante a gorge pour usage temporaire d'un pneu degonfleInfo
- Publication number
- CA1056284A CA1056284A CA266,915A CA266915A CA1056284A CA 1056284 A CA1056284 A CA 1056284A CA 266915 A CA266915 A CA 266915A CA 1056284 A CA1056284 A CA 1056284A
- Authority
- CA
- Canada
- Prior art keywords
- tire
- hollow body
- safety device
- rim
- drop
- 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.)
- Expired
Links
- 229920001971 elastomer Polymers 0.000 claims abstract description 35
- 239000011324 bead Substances 0.000 claims abstract description 22
- 239000005060 rubber Substances 0.000 claims description 24
- 239000006260 foam Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 7
- 229920003052 natural elastomer Polymers 0.000 claims description 5
- 229920001194 natural rubber Polymers 0.000 claims description 5
- 229920003051 synthetic elastomer Polymers 0.000 claims description 3
- 239000005061 synthetic rubber Substances 0.000 claims description 3
- 230000003467 diminishing effect Effects 0.000 claims description 2
- 239000003566 sealing material Substances 0.000 claims description 2
- 230000008719 thickening Effects 0.000 claims description 2
- 229920000136 polysorbate Polymers 0.000 claims 1
- 239000000806 elastomer Substances 0.000 abstract description 11
- 239000000565 sealant Substances 0.000 abstract description 11
- 239000007787 solid Substances 0.000 abstract description 8
- 239000000203 mixture Substances 0.000 abstract description 7
- 230000001050 lubricating effect Effects 0.000 abstract description 4
- 230000002787 reinforcement Effects 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 4
- 230000006378 damage Effects 0.000 description 11
- 229920002545 silicone oil Polymers 0.000 description 9
- 239000000126 substance Substances 0.000 description 7
- 239000001993 wax Substances 0.000 description 6
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 229920001084 poly(chloroprene) Polymers 0.000 description 4
- 230000002028 premature Effects 0.000 description 4
- 244000043261 Hevea brasiliensis Species 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- -1 etc.~ Substances 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 229920002379 silicone rubber Polymers 0.000 description 3
- 239000004945 silicone rubber Substances 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000003831 antifriction material Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229920003225 polyurethane elastomer Polymers 0.000 description 2
- 210000003371 toe Anatomy 0.000 description 2
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 1
- KGIGUEBEKRSTEW-UHFFFAOYSA-N 2-vinylpyridine Chemical compound C=CC1=CC=CC=N1 KGIGUEBEKRSTEW-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 206010039203 Road traffic accident Diseases 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 235000015076 Shorea robusta Nutrition 0.000 description 1
- 244000166071 Shorea robusta Species 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- WNLRTRBMVRJNCN-UHFFFAOYSA-L adipate(2-) Chemical compound [O-]C(=O)CCCCC([O-])=O WNLRTRBMVRJNCN-UHFFFAOYSA-L 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- CEGOLXSVJUTHNZ-UHFFFAOYSA-K aluminium tristearate Chemical compound [Al+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CEGOLXSVJUTHNZ-UHFFFAOYSA-K 0.000 description 1
- 229940063655 aluminum stearate Drugs 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- HPXRVTGHNJAIIH-UHFFFAOYSA-N cyclohexanol Chemical compound OC1CCCCC1 HPXRVTGHNJAIIH-UHFFFAOYSA-N 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- VMRGZRVLZQSNHC-ZCXUNETKSA-N n-[(z)-octadec-9-enyl]hexadecanamide Chemical compound CCCCCCCCCCCCCCCC(=O)NCCCCCCCC\C=C/CCCCCCCC VMRGZRVLZQSNHC-ZCXUNETKSA-N 0.000 description 1
- GZNRISJLOXVOSH-UHFFFAOYSA-N n-phenylaniline;propan-2-one Chemical compound CC(C)=O.C=1C=CC=CC=1NC1=CC=CC=C1 GZNRISJLOXVOSH-UHFFFAOYSA-N 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 1
- 229940113162 oleylamide Drugs 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000012812 sealant material Substances 0.000 description 1
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical class OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 1
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 1
- 229940080350 sodium stearate Drugs 0.000 description 1
- 229940037312 stearamide Drugs 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 description 1
- 229960002447 thiram Drugs 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/02—Seating or securing beads on rims
- B60C15/028—Spacers between beads
- B60C15/032—Spacers between beads inflatable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B21/00—Rims
- B60B21/12—Appurtenances, e.g. lining bands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
- B60C17/01—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional inflatable supports which become load-supporting in emergency
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
- B60C17/04—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency
- B60C17/06—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
- B60C17/04—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency
- B60C17/06—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient
- B60C17/065—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient made-up of foam inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
- B60C17/04—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency
- B60C17/06—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient
- B60C2017/068—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient comprising springs, e.g. helical springs
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762600691 DE2600691A1 (de) | 1976-01-09 | 1976-01-09 | Sicherheitseinrichtung an fahrzeugraedern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1056284A true CA1056284A (fr) | 1979-06-12 |
Family
ID=5967221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA266,915A Expired CA1056284A (fr) | 1976-01-09 | 1976-11-30 | Dispositif de necessite sur jante a gorge pour usage temporaire d'un pneu degonfle |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS5286604A (fr) |
| AU (1) | AU2115177A (fr) |
| BE (1) | BE850193A (fr) |
| CA (1) | CA1056284A (fr) |
| DE (1) | DE2600691A1 (fr) |
| DK (1) | DK7477A (fr) |
| FR (1) | FR2337633A1 (fr) |
| GB (1) | GB1571916A (fr) |
| LU (1) | LU76540A1 (fr) |
| NL (1) | NL7700194A (fr) |
| NO (1) | NO770057L (fr) |
| SE (1) | SE7700175L (fr) |
| TR (1) | TR19520A (fr) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4418734A (en) * | 1982-03-19 | 1983-12-06 | The Goodyear Tire & Rubber Company | Safety support system |
| US4751951A (en) * | 1983-09-14 | 1988-06-21 | The Goodyear Tire & Rubber Company | Safety support system for a tubeless tire |
| GB2167359A (en) * | 1984-02-02 | 1986-05-29 | Timothy John Houghton | Inserts for supporting deflated tyres |
| FR2639289B1 (fr) * | 1988-11-23 | 1991-07-05 | Hutter Maurice | Ensemble de roue automobile increvable, indejantable a pression constante d'utilisation |
| FR2723036A1 (fr) * | 1994-07-29 | 1996-02-02 | Michelin & Cie | Ensemble pneumatique sans chambre a air pour vehicules deux roues comportant une structure annulaire elastique et deformable |
| CN100389952C (zh) | 1999-12-13 | 2008-05-28 | 陶氏环球技术公司 | 轻量轮胎支架和制造轮胎支架的组合物及方法 |
| FR2803595A1 (fr) * | 2000-01-12 | 2001-07-13 | Michelin Soc Tech | Composition de caoutchouc utilisable a l'etat vulcanise comme appui de securite pour pneumatique et un tel appui |
| EP1338442B1 (fr) * | 2000-11-30 | 2008-04-23 | Bridgestone Corporation | Chambre a air pour pneumatique de securite |
| US20060130948A1 (en) * | 2004-12-21 | 2006-06-22 | Sandstrom Paul H | Tire support ring |
| EP2173572B1 (fr) * | 2007-06-13 | 2013-04-17 | Jeffrey P. Douglas | Joint d'étanchéité pneumatique ayant une chambre à air interne et revêtement expansible pour un pneu de type à chambre à air |
| US8875761B2 (en) | 2012-01-13 | 2014-11-04 | Bear Corporation | System and method of securing a pneumatic tire to a rim |
| DE102014225107A1 (de) | 2014-12-08 | 2016-06-09 | Continental Reifen Deutschland Gmbh | Notlaufstützvorrichtung aufweisend einen Notlaufring |
| ES1153685Y (es) * | 2016-01-20 | 2016-07-08 | De Urbina Angoso Javier Ortiz | Sistema de fijacion del neumatico a la llanta y sellado interno de la llanta, que permite convertir un montaje tipico con camara en uno sin camara, |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL108868C (fr) * | 1957-07-22 | |||
| US3392772A (en) * | 1966-06-06 | 1968-07-16 | Firestone Tire & Rubber Co | Pneumatic tire and a replaceable unit therewith |
| US3485283A (en) * | 1967-12-19 | 1969-12-23 | Du Pont | Emergency support for pneumatic tires |
-
1976
- 1976-01-09 DE DE19762600691 patent/DE2600691A1/de active Pending
- 1976-11-30 CA CA266,915A patent/CA1056284A/fr not_active Expired
-
1977
- 1977-01-07 FR FR7700341A patent/FR2337633A1/fr not_active Withdrawn
- 1977-01-07 LU LU76540A patent/LU76540A1/xx unknown
- 1977-01-07 BE BE173922A patent/BE850193A/fr unknown
- 1977-01-07 NO NO770057A patent/NO770057L/no unknown
- 1977-01-07 AU AU21151/77A patent/AU2115177A/en not_active Expired
- 1977-01-07 TR TR19520A patent/TR19520A/xx unknown
- 1977-01-07 DK DK7477A patent/DK7477A/da unknown
- 1977-01-10 JP JP86877A patent/JPS5286604A/ja active Pending
- 1977-01-10 SE SE7700175A patent/SE7700175L/xx unknown
- 1977-01-10 NL NL7700194A patent/NL7700194A/xx not_active Application Discontinuation
- 1977-01-10 GB GB721/77A patent/GB1571916A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NO770057L (no) | 1977-07-12 |
| SE7700175L (sv) | 1977-07-10 |
| BE850193A (fr) | 1977-07-07 |
| LU76540A1 (fr) | 1978-09-18 |
| JPS5286604A (en) | 1977-07-19 |
| NL7700194A (nl) | 1977-07-12 |
| TR19520A (tr) | 1979-06-27 |
| AU2115177A (en) | 1978-07-13 |
| DK7477A (da) | 1977-07-10 |
| FR2337633A1 (fr) | 1977-08-05 |
| DE2600691A1 (de) | 1977-07-14 |
| GB1571916A (en) | 1980-07-23 |
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