SE436597B - DISC BRAKE, MADE FOR MOTOR VEHICLES - Google Patents

DISC BRAKE, MADE FOR MOTOR VEHICLES

Info

Publication number
SE436597B
SE436597B SE7901287A SE7901287A SE436597B SE 436597 B SE436597 B SE 436597B SE 7901287 A SE7901287 A SE 7901287A SE 7901287 A SE7901287 A SE 7901287A SE 436597 B SE436597 B SE 436597B
Authority
SE
Sweden
Prior art keywords
brake
disc
caliper
guide pins
shoes
Prior art date
Application number
SE7901287A
Other languages
Swedish (sv)
Other versions
SE7901287L (en
Inventor
H Steffen
A Birkenbach
Original Assignee
Teves Gmbh Alfred
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Teves Gmbh Alfred filed Critical Teves Gmbh Alfred
Publication of SE7901287L publication Critical patent/SE7901287L/en
Publication of SE436597B publication Critical patent/SE436597B/en

Links

Classifications

    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
    • F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
    • F16D55/2265—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing
    • F16D55/227—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing by two or more pins
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
    • F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
    • F16D55/2262—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by open sliding surfaces, e.g. grooves
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
    • F16D65/095—Pivots or supporting members therefor
    • F16D65/097—Resilient means interposed between pads and supporting members or other brake parts
    • F16D65/0973—Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces
    • F16D65/0974—Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces acting on or in the vicinity of the pad rim in a direction substantially transverse to the brake disc axis
    • F16D65/0977—Springs made from sheet metal
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D2055/0004—Parts or details of disc brakes
    • F16D2055/0041—Resilient elements interposed directly between the actuating member and the brake support, e.g. anti-rattle springs
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D2065/026—Braking members; Mounting thereof characterised by a particular outline shape of the braking member, e.g. footprint of friction lining

Description

7901287-8 verkande anordningen kan föras tätt intill ansatserna, så att den sträcka armarna sträcker sig axiellt utanför bromsskivans kant inte är längre än bromsokets bredd. Dessutom kan den axiella utsträckningen av ansatserna på bromsoket ökas utan att detta ogynnsamt påverkar bromsens längd. Eftersom ansat- serna på bromsoket vilar på styrpinnarnas radiellt yttre ytor, kan de anordnas ovanför skivans kant så att konstruktionen en- ligt uppfinningen medger maximal bromsskivediameter. The device 7901287-8 can be moved close to the shoulders, so that the extending arms extend axially outside the edge of the brake disc is not longer than the width of the brake caliper. In addition, the axial extent of the shoulders on the caliper can be increased without this adversely affecting the length of the brake. Since the projections on the brake caliper rest on the radially outer surfaces of the guide pins, they can be arranged above the edge of the disc so that the construction according to the invention allows a maximum brake disc diameter.

Eftersom bromsokets ansatser inte helt omsluter styrpinnarna är enligt uppfinningen en snäppfjäder anordnad som omsluter oket från dess utsida. Snäppfjädern är fäst vid bromsbärarens armar och pressar okets ansatser mot styrpinnarna. Snäppfjä- derns ändar är lämpligen förankrade i urtagningar i styrpin- narnas ändar för att säkra dessa mot axiell förskjutning.Since the shoulder of the brake caliper does not completely enclose the guide pins, according to the invention a snap spring is provided which encloses the yoke from its outside. The snap spring is attached to the brake carrier's arms and presses the yoke's approaches against the guide pins. The ends of the snap spring are suitably anchored in recesses in the ends of the guide pins to secure them against axial displacement.

'Detta arrangemang eliminerar behovet av ytterligare fästorgan för styrpinnarna. För att uppnå god slitstyrka är ansatserna på oket lämpligen skalformade.This arrangement eliminates the need for additional fasteners for the guide pins. To achieve good wear resistance, the shoulders of the yoke are suitably shell-shaped.

En utföringsform av uppfinningen beskrivs närmare nedan under hänvisning till bifogade figurer.An embodiment of the invention is described in more detail below with reference to the accompanying figures.

Figur l visar bromsen enligt uppfinningen sedd uppifrån, figur 2 visar en sidovy, delvis sektionerad, av bromsen enligt figur l sedd från den sida där påverkningsorganet är beläget, medan figur 3 visar bromsen sedd från motsatt sida.Figure 1 shows the brake according to the invention seen from above, figure 2 shows a side view, partly sectioned, of the brake according to figure 1 seen from the side where the actuating means is located, while figure 3 shows the brake seen from the opposite side.

Skivbromsen som visas i figurerna innefattar en bromsbärare l med armar 2, 3 som sträcker sig tvärs över bromsskivans 4 kant. vid armarnas 2, 3 ändar är ansatser 21, 31 anordnade, vilka upptar styrpinnar 5, 6. Styrpinnarna är belägna innanför ar- marna 2, 3 och sträcker sig med sina ändar 7, 8 förbi dessa.The disc brake shown in the figures comprises a brake carrier 1 with arms 2, 3 extending across the edge of the brake disc 4. at the ends of the arms 2, 3, projections 21, 31 are arranged, which receive guide pins 5, 6. The guide pins are located inside the arms 2, 3 and extend with their ends 7, 8 past them.

Bromsbackar 9, lO är anordnade mellan ansatserna 21, 31 på båda sidor om bromsskivan 4, varvid bromsbackarnas underlags- 7901287-8 ytor formar ansatser ll, 12, 13, 14 som omsluter styrpin- narna 5, 6. Ansatserna ll, 13 är belägna på ingångssidan till skivan vid dennas huvudsakliga rotationsriktning och omsluter fullständigt styrpinnen 5. Dessa tjänar i första hand till att ta upp det vridmoment som verkar på broms- backarna när bromsning sker. Ansatserna l2, 14 är delade och tjänar i första hand till att hindra vridning av broms- backarna 9, 10 runt styrpinnen 5. Spelet mellan styrpinnen 6 och ansatserna l2, 14 kan emellertid dimensioneras så att det elimineras genom elastisk deformation vid mycket stora vrid- moment, varigenom en del av dessa kan överföras till styrpin- nen 6 genom ansatserna l2, 14.Brake shoes 9, 10 are arranged between the shoulders 21, 31 on both sides of the brake disc 4, the base surfaces of the brake shoes forming shoulders 11, 12, 13, 14 enclosing the guide pins 5, 6. The shoulders 11, 13 are located on the input side of the disc at its main direction of rotation and completely encloses the guide pin 5. These primarily serve to absorb the torque acting on the brake shoes when braking. The shafts 12, 14 are divided and serve primarily to prevent rotation of the brake shoes 9, 10 around the guide pin 5. However, the clearance between the guide pin 6 and the shafts 12, 14 can be dimensioned so that it is eliminated by elastic deformation at very large turns. torque, whereby some of these can be transferred to the guide pin 6 through the shoulders l2, 14.

Mellan armarna 2, 3 på bromsbäraren l är ett bromsok 15 an- ordnat som grenslar bromsskivans kant och bromsbackarna i form av ett U, med ett ben anliggande direkt mot bromsbacken 9 och det andra benet 17, försett med en hydraulisk bromspåverknings- anordning, direkt mot bromsbacken 10. Benet 17 har lagerurtag- ningar 18, 19 anordnade vid sidan av bromspåverkningsanord- ningen och förskjutbara på styrpinnarnas 7, 8 ändar 5, 6. För att minska friktionen är bussningar av lämpligt material an- ordnade i lagerurtagningarna 18, 19. I området mellan ansat- serna ll, 12, l3, 14 på underlagsplattorna har bromsoket 15 ansatser 20, 21 som vilar på styrpinnarna 5, 6 och tjänar hu- vudsakligen till att styra den del av bromsoket 15 som inne- fattar benet 16. En snäppfjäder 22 som omsluter den radiellt yttre kanten av benet 16 är förspänd i riktning mot bromsski- vans 16 rotationsaxel och pressar ansatserna 20, 21 mot styr- pinnarna 5, 6. Snäppfjäderns 22 ändar 23, 24 omsluter lager- urtagningarna 21, 31 och griper in i urtagningar 25, 26 i styr- pinnarna 5, 6, varigenom de senare låses i axiell riktning.Between the arms 2, 3 of the brake carrier 1 a brake caliper 15 is arranged which branches off the edge of the brake disc and the brake shoes in the form of a U, with one leg abutting directly against the brake shoe 9 and the other leg 17, provided with a hydraulic brake actuator, directly against the brake shoe 10. The leg 17 has bearing recesses 18, 19 arranged next to the brake actuating device and slidable on the ends 5, 6 of the guide pins 7, 8. To reduce the friction, bushings of suitable material are arranged in the bearing recesses 18, 19. In the area between the lugs 11, 12, 13, 14 on the base plates, the caliper 15 has lugs 20, 21 which rest on the guide pins 5, 6 and serve mainly to guide the part of the caliper 15 which comprises the leg 16. A snap spring 22 enclosing the radially outer edge of the leg 16 is biased toward the axis of rotation of the brake disc 16 and presses the shafts 20, 21 against the guide pins 5, 6. The ends 23, 24 of the snap spring 22 enclose the bearing recesses 2 1, 31 and engages in recesses 25, 26 in the guide pins 5, 6, whereby the latter are locked in the axial direction.

En bladfjäder 27 är anordnad mellan armen 3 och styrpinnen 6, varvid ett av fjäderns ben anligger mot armen 3 medan två mot- stående ben stöder mot ansatserna l2, 14 på bromsbackarnas 9, 10 underlagsplattor. Bromsbackarna 9, 10 är härigenom fjädrande förankrade i sina styrpinnar, varigenom klapperljud elimineras vid icke bromsat läge. .7901287-8 Bromsen enligt uppfinningen medger enkelt utbyte av broms- backar. Sedan snäppfjädern 22 demonterats, dras styrpinnen 5 ut ur lagringarna 2 , varigenom bromsoket 15 kan vridas ra- diellt utåt runt styrpinnen 6. För detta ändamål är en av- fasning gjord i lagerurtagningen 31 (visad i figur 3) för att möjliggöra vridning av benet 16 förbi denna. Sedan broms- oket 15 vridits upp, kan bromsbackarna 9, 10 demonteras från bromsbäraren. Montering av nya bromsbackar sker i omvänd ord- ning.A leaf spring 27 is arranged between the arm 3 and the guide pin 6, one of the legs of the spring abutting against the arm 3 while two opposite legs abut the projections 12, 14 on the base plates of the brake shoes 9, 10. The brake shoes 9, 10 are hereby resiliently anchored in their guide pins, whereby rattling noise is eliminated in the unbraked position. .7901287-8 The brake according to the invention allows easy replacement of brake shoes. After the snap spring 22 has been disassembled, the guide pin 5 is pulled out of the bearings 2, whereby the caliper 15 can be rotated radially outwards around the guide pin 6. For this purpose a bevel is made in the bearing recess 31 (shown in figure 3) to enable rotation of the leg 16 past this. After the brake yoke 15 has been turned up, the brake shoes 9, 10 can be disassembled from the brake carrier. Installation of new brake shoes takes place in reverse order.

Utöver de ovan nämnda fördelarna, utmärkes bromsen enligt upp- finningen av en mycket enkel form och låg framställningskostnad, eftersom endast ett fåtal ytor på de lämpligen gjutna detaljerna nbehöver bearbetas. Antalet detaljer är också litet, vilket med- för låga produktions- och lagerhållningskostnader. Styrningen av bromsoket är helt avlastad från vridmoment och utsätts där- för endast för ringa slitage. Bromsbacksarrangemanget undviker uppkomsten av kilformigt tangentiellt slitage och slutligen medger utformningen mycket enkel service utan krav på special- verktyg.In addition to the above-mentioned advantages, the brake according to the invention is characterized by a very simple shape and low manufacturing cost, since only a few surfaces on the suitably cast parts need to be machined. The number of details is also small, which means low production and warehousing costs. The control of the brake caliper is completely relieved of torque and is therefore only exposed to slight wear. The brake shoe arrangement avoids the occurrence of wedge-shaped tangential wear and finally the design allows very simple service without the need for special tools.

Claims (1)

1. 7901287-8 P A T E N T K R A V Skivbroms, speciellt avsedd för motorfordon, med en, vid sidan av en bromsskiva (4) anordnad bromsbärare (1) med armar (2, 3) som sträcker sig tvärs över broms- skivans (4) kant, varvid varje arm uppbär en styrpinne (5, 6) parallell med rotationsaxeln, bromsbackar (9, 10) anordnade på båda sidor om bromsskivan (4) och med ett bromsok (15) mellan bromsbärarens (1) armar (2, 3) vilken grenslar bromsskivans (4) kant och bromsbackarna (9, 10) och som innefattar en bromspåverkande anordning för att pressa bromsbackarna (9, 10) mot bromsskivan (4), varvid bromsbackarna (9, 10) och bromsoket (15) styrs axiellt förskjutbart på styrpinnarna (5, 6) medelst ansatser (11, 12, 13, 14) som helt eller delvis omsluter styrpin- narna, k ä n n e t e c k n a d d ä r a v , att minst två ansatser (20, 21) på bromsoket (15) är anordnade mel- lan de två bromsbackarnas (9, 10) styrningar (ll, 12, 13, 14) vilka ansatser vilar på styrpinnarna (5, 6) på dessas radiellt utåt vända ytor. Skivbroms enligt krav 1, k ä n n e t e c k n a d d ä r - a v , att en snäppfjäder (22), som omsluter bromsoket (15) utvändigt och som är fäst vid armarna (2, 3) på bromsbä- raren (1), pressar ansatserna (20, 21) på bromsoket (15) mot styrpinnarna (5, 6). Skivbroms enligt krav 2, k ä n n e t e c k n a d d ä r - att snäppfjäderns (22) ändar (23, 24) är förankrade i urtagningar (25, 26) i styrpinnarnas ändar (5, 6) och âV, säkrar dessa mot axiell förskjutning. k ä n n e - (20, 21) på Skivbroms enligt något av föregående krav, t e c k n a d d ä r a v , att ansatserna bromsoket (15) är skalformade.7901287-8 CLAIMS Disc brake, specially designed for motor vehicles, with a brake carrier (1) arranged next to a brake disc (4) with arms (2, 3) extending across the edge of the brake disc (4), wherein each arm carries a guide pin (5, 6) parallel to the axis of rotation, brake shoes (9, 10) arranged on both sides of the brake disc (4) and with a brake caliper (15) between the arms (2, 3) of the brake carrier (1) which branches off the brake disc (4) edge and brake shoes (9, 10) and comprising a brake actuating device for pressing the brake shoes (9, 10) against the brake disc (4), the brake shoes (9, 10) and the brake caliper (15) being guided axially displaceably on the guide pins ( 5, 6) by means of projections (11, 12, 13, 14) which completely or partially enclose the guide pins, characterized in that at least two projections (20, 21) on the caliper (15) are arranged between the the guides (11, 12, 13, 14) of the two brake shoes (9, 10) which projections rest on the guide pins (5, 6) on their radially outwardly facing surfaces. Disc brake according to claim 1, characterized in that a snap spring (22), which encloses the brake caliper (15) externally and which is attached to the arms (2, 3) of the brake carrier (1), presses the shoulders (20 , 21) on the brake caliper (15) against the guide pins (5, 6). Disc brake according to claim 2, characterized in that the ends (23, 24) of the snap spring (22) are anchored in recesses (25, 26) in the ends (5, 6) of the guide pins and âV, securing these against axial displacement. feel - (20, 21) on Disc brake according to one of the preceding claims, t e c k n a d d a r a v, that the approaches the brake caliper (15) are shell-shaped.
SE7901287A 1978-03-06 1979-02-14 DISC BRAKE, MADE FOR MOTOR VEHICLES SE436597B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782809650 DE2809650A1 (en) 1978-03-06 1978-03-06 FLOATING CALIPER PARTIAL DISC BRAKE, ESPECIALLY FOR MOTOR VEHICLES

Publications (2)

Publication Number Publication Date
SE7901287L SE7901287L (en) 1979-09-07
SE436597B true SE436597B (en) 1985-01-07

Family

ID=6033710

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7901287A SE436597B (en) 1978-03-06 1979-02-14 DISC BRAKE, MADE FOR MOTOR VEHICLES

Country Status (6)

Country Link
DE (1) DE2809650A1 (en)
ES (1) ES478252A1 (en)
FR (1) FR2419433A1 (en)
GB (1) GB2016099B (en)
IT (1) IT1111894B (en)
SE (1) SE436597B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT8324024V0 (en) * 1983-12-23 1983-12-23 Brembo Spa DISC BRAKE COMPLEX WITH FLOATING CALIPER.
DE3509277A1 (en) * 1985-03-15 1986-09-25 Alfred Teves Gmbh, 6000 Frankfurt PARTIAL DISC BRAKE, IN PARTICULAR FOR MOTOR VEHICLES
US5022500A (en) * 1988-09-14 1991-06-11 Brake And Clutch Industries Australia Pty. Ltd. Disc brake caliper
GB2250554A (en) * 1990-12-04 1992-06-10 Gen Motors France Disc brake.
DE4440519A1 (en) * 1994-11-12 1996-05-15 Teves Gmbh Alfred Floating caliper for disc brakes

Also Published As

Publication number Publication date
GB2016099A (en) 1979-09-19
IT7920744A0 (en) 1979-03-05
GB2016099B (en) 1982-05-26
ES478252A1 (en) 1979-11-16
IT1111894B (en) 1986-01-13
FR2419433A1 (en) 1979-10-05
DE2809650A1 (en) 1979-09-20
SE7901287L (en) 1979-09-07

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