EP0079399B1 - Reinigungsvorrichtung zum Reinigen des Luftfilters eines Kühlluftgehäuses mit einem ein Gebläse aufweisenden Kühler - Google Patents

Reinigungsvorrichtung zum Reinigen des Luftfilters eines Kühlluftgehäuses mit einem ein Gebläse aufweisenden Kühler Download PDF

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Publication number
EP0079399B1
EP0079399B1 EP81109690A EP81109690A EP0079399B1 EP 0079399 B1 EP0079399 B1 EP 0079399B1 EP 81109690 A EP81109690 A EP 81109690A EP 81109690 A EP81109690 A EP 81109690A EP 0079399 B1 EP0079399 B1 EP 0079399B1
Authority
EP
European Patent Office
Prior art keywords
suction
air filter
propeller
arrangement according
suction element
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
Application number
EP81109690A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0079399A1 (de
Inventor
Rolf Peiler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Priority to DE8181109690T priority Critical patent/DE3175314D1/de
Priority to EP81109690A priority patent/EP0079399B1/de
Priority to US06/437,427 priority patent/US4443236A/en
Priority to AU90275/82A priority patent/AU550499B2/en
Priority to CA000415324A priority patent/CA1196582A/en
Priority to BR8206547A priority patent/BR8206547A/pt
Priority to ZA828293A priority patent/ZA828293B/xx
Priority to DK504282A priority patent/DK155451C/da
Priority to ES517312A priority patent/ES517312A0/es
Priority to MX195175A priority patent/MX154662A/es
Publication of EP0079399A1 publication Critical patent/EP0079399A1/de
Application granted granted Critical
Publication of EP0079399B1 publication Critical patent/EP0079399B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/12—Filtering, cooling, or silencing cooling-air

Definitions

  • the invention relates to a cleaning device for cleaning a suction surface of an air filter of a cooling unit provided in a harvesting machine with at least one cooler having a blower for an internal combustion engine or an air conditioning system, the dirt particles adhering to the suction surface via a suction part provided outside the cooling air housing, a suction line connected to this, connected to a vacuum side of the cooling air housing and an outlet opening are released into the open.
  • An internal combustion engine with a cleaning device for a fixed filter is known (US-A-3155473), which consists of a filter arranged in front of the screen.
  • the pressure part is connected via a compressed air line to a compressed air nozzle which is pressurized with compressed air via a propeller arranged on the internal combustion engine, so that it can then be pressed through the sieve in order to press the dirt particles out of the air filter.
  • a cleaning device for cleaning the air filter for an internal combustion engine installed in a combine harvester is also known (DE-A-2 418 054), which is surrounded by an engine cowling.
  • This cladding has a front wall with air inlet openings, on the outside of which a stationary suction part is arranged, which is connected to the blower of the internal combustion engine via a suction line.
  • the air filter consists of a pot-like sieve and is rotatably mounted in the outer wall of the combine harvester, which is part of the engine cowling, and sealed against the wall of the housing. Furthermore, the air filter must be driven by an additional drive device.
  • a cleaning device for cleaning an air filter of the type mentioned at the outset is known (US Pat. No. 3,837,149), which consists of a rotatably mounted air filter which is provided in a housing for receiving the internal combustion engine and which has to be cleaned via a suction nozzle. A part of the suction nozzle is guided along the outer surface of the rotatably mounted air filter and is operatively connected via a suction nozzle to a further propeller which is driven by the power take-off of the internal combustion engine.
  • the air filter is driven by a special drive device, which is also arranged in the housing for covering the internal combustion engine.
  • Such a device is relatively complex and expensive, since the rotatably mounted air filter must be sealed, so that no kei. l e dirt particles can enter in the area of the air filter bearing.
  • the invention has for its object to improve a harvesting machine with a cleaning device for a fixed air filter so that a good cleaning of the air filter can be achieved with simple structural means while saving on driving means.
  • This object has been achieved in that the suction part is rotatably mounted in front of the suction surface and is assembled with at least one propeller part or is designed as such to generate the drive torque.
  • the cleaning device Due to the advantageous design of the cleaning device, it is possible to achieve effective cleaning of the air filter in a simple manner using fewer components, for which purpose the suction part moves in front of the surface of the air filter and in each case generates a negative pressure on the surface to be covered, so that there adhering dirt particles are removed and then gradually move to the center, where they can be discharged via the blower line to the outside. Due to the rotatable mounting of the suction part via the propeller part assigned to it, a drive for the suction part is created in a simple manner, so that a complex additional drive device for the suction part is no longer necessary. Since the blower air has the same flow direction as the dirt particles to be extracted, they can be discharged to the outside via the blower, which is located behind the cooler.
  • the suction surface forms the surface of the cooler or the surface of an air filter upstream of the cooler, as seen in the flow direction, a continuous inlet opening of the suction part sweeping approximately the entire suction surface.
  • the suction part has at least one inlet opening at its outer end and that the suction part consists of a U-shaped support open on three sides, the opposite legs of which are exposed in the area of the outer end so that they are connected to the web of the U-profile support form an obtuse angle, while the leg piece adjoining the exposed part forms a right angle with the web.
  • the dirt particles which are pressed onto the surface of the air filter by the air flow entering the air filter, are sucked off by the rotating suction nozzle, since no contact pressure affects the dirt particles below the suction part, so that they detach from the surface of the air filter can.
  • the suction flow below the suction part the dirt particles are guided to penetration and through the suction line through the air filter into the adjoining blower line, which is connected to an outlet opening of the blower housing.
  • This arrangement creates an effective suction device in a simple manner, which can be driven at the same time by the air entering the air filter. Since only the suction part rotates and the air filter is firmly connected to the blower housing, a relatively expensive seal for the air filter can be dispensed with.
  • the suction part can be designed so that it also works as a propeller. However, it is also possible that the propeller is detachably connected to the suction part. In this way you get two individual components that are much easier to manufacture.
  • the suction part has a propeller which can be releasably connected to it and which is arranged offset with respect to the suction part as seen in the direction of rotation. It is also advantageous that the axis for receiving the suction part is received in a holder which is detachably connected to a wall of the harvesting machine or to the air filter or to a part of the suction line.
  • the suction part is arranged concentrically to the inlet opening and is rotatably received at the front end of the suction line. It is also advantageous that the cross section of the suction part widens towards the axis of rotation and is triangular or semicircular. It is also advantageous that the suction line can be formed from one or more detachably connectable parts.
  • the suction part can either be rotatably mounted directly in a holder connected to the filter or can be received in a holder which is attached to the outside of the combine harvester.
  • the drive of the suction part can be improved in that the web of the suction part has an incision in the area of its two outer ends, at the end edge of which runs parallel to the longitudinal axis of the suction part, an angled part is connected in the direction of the air filter, the surface of which is approximately parallel to the The surface of the other exhibited part runs.
  • 10 denotes a combine housing of a self-propelled combine 11, which has two front wheels 12 and two rear, controllable wheels 14.
  • the combine housing 10 is provided with a vertically extending side wall 16.
  • the combine 11 has a laterally protruding collecting container 18 which is arranged approximately centrally in the combine, the side walls of the collecting container 18 running outside the side wall 16 of the combine housing 10.
  • a driver's cab 20 is located on the left side of the combine 11 above the front wheels 12 and immediately in front of the collecting container 18.
  • To the right of the driver's cab 20 is an engine cowling 22 which is provided with a horizontally extending cover 24 which is on the same level how the upper edge of the collecting container 18 lies.
  • the engine cover 22 has a right, somewhat inclined side wall 26, a front derwand 28 and a not visible in the drawing left side wall and a rear wall.
  • the drawing shows on the left and right with reference to the direction of travel of the combine 11 according to FIG. 1.
  • Combine harvester housing 10 has a forward-facing crop inlet opening, not visible in the drawing, to which an inclined conveyor housing 30 is connected, which extends forward and downward from the crop inlet opening and can have a harvesting device 34, for example a maize header, at the front end. which is only indicated schematically in the drawing.
  • An internal combustion engine 36 (FIG. 3) extending transversely to the direction of travel is provided with a shaft 38 for driving a traction mechanism transmission 40, in FIG.
  • An approximately rectangularly shaped, vertically extending radiator or engine cooler 42 is located between the right side wall 26 and the right end of the internal combustion engine 36.
  • Hose lines are connected to the engine cooler 42, which conduct coolant to and from the internal combustion engine 36 .
  • the engine cooler 42 is arranged on a support device, also not shown in the drawing, which can be connected to a support device of the internal combustion engine 36.
  • blower 44 which can be driven via the internal combustion engine and which consists of a rectangular plate 46 with a circular opening 48 in which an impeller 50 is arranged. Furthermore, a blower duct 52 is guided into the area of the opening 48 of the blower 44, which, like the blower, can be mounted on a holder (not shown in the drawing).
  • a suction line 54 connects to the blower duct 52 and can be detachably connected to the right end 56 of the blower duct 52.
  • the suction line 54 is connected to an inlet opening 58 which is provided in an air filter 60.
  • the air filter 60 is located in the right tepitenwand 26 of the combine housing 10.
  • the air filter, " ⁇ has numerous small openings through which cleaned air is sucked in via the blower 44.
  • the air filter 60 which in the exemplary embodiment is rectangular, can also have a circular cross-section and are detachably mounted in a corresponding opening provided in the side wall 26. It is also possible to connect the air filter 60 to the side wall by means of hinges, so that it can be folded outwards for better access to the internal parts of the blower 44 and the engine cooler 42 provided between the blower and the air filter 60.
  • a holder 62 for receiving an axis 64 on which a suction part 66 is rotatably mounted U-shaped profile carrier and is to the surface of the air filter 60 and on its two outer end faces open so that cleaning air can get into the suction channel 68 of the suction part 66, which is sucked off via the suction line 54 and the blower channel 52.
  • the air discharged from the blower duct 52 passes through the opening 48 of the blower 44 into the area of the internal combustion engine 36 and exits through numerous outlet openings 69 provided in the front wall 28 of the engine cowling 22.
  • the front end of the suction line 54 can also serve as the holder 62.
  • the suction part 66 there is a propeller 67, which can be detachably connected to the suction part 66 and which is designed such that it is set in rotation by the sucked-in air which enters the air filter 60 through the small openings. Since the propeller 67 is connected to the suction part 66, the suction part 66 is also driven and sweeps past the surface of the air filter 60.
  • the suction part 66 is sc angtlo ' dnet with its edges pointing in the direction of the air filter that only a minimal gap remains between the edges of the suction part 66 and the surface of the air filter 60.
  • the fan wheel 50 of the fan 44 shown in FIG. 3 is rotatably mounted on an axis not shown in the drawing and is equipped with a drive wheel which can be connected to the drive shaft 38 of the internal combustion engine 36 via a traction mechanism gear.
  • FIG. 4 and 5 show a further exemplary embodiment of a cleaning device for cleaning the air filter 60, which is equipped with a differently designed suction line 54.
  • the recooler 42 ′ shown in FIG. 4 has a condenser for an evaporator (not shown in the drawing) arranged in the driver's cab 20.
  • the condenser is formed from individual cooling coils 71 and integrated in the cooler 42 '.
  • the cooling coils 71 of the condenser are connected via an output line 70 to the evaporator, not shown in the drawing, of an air conditioning system, the output of which is connected to the supply line 72 of the condenser.
  • a cool air housing 74 connects to the cooler 42 ′ with the associated condenser.
  • the cooling air housing 74 has an inlet opening 78 which is rectangular in cross section and which is completely covered by the sieve-like air filter 60 with numerous through openings.
  • the air filter 60 according to FIG. 4 can be provided in the side wall 26 of the combine housing, as in the exemplary embodiment according to FIG. 3.
  • the cooling air housing 74 has two vertically extending side walls 80 and 82 as well as an upper wall 84 and a lower wall 86.
  • a holder 88 is connected to the vertically extending side walls 80, 82 and serves to receive an axis 64.
  • the rear end of the axle 64 received in the holder 88 can be supported in the air filter 60 with its rear end.
  • the bracket is releasably attached to the connecting elements, not shown in the drawing Side walls 80 and 82 connected.
  • a suction part 66 ' is rotatably mounted on the axis 64 and, like the suction part 66 according to FIG. 3, consists of a U-profile. 4 and 5, the outer part of the leg of the U-shaped suction part is provided with a propeller part 90, which forms an obtuse angle with the central web 94 of the suction part 66 '.
  • a leg piece 96 adjoins the propeller part 90 and encloses a right angle with the web 94.
  • the opposite outer leg of the suction part 66 ' also has an outward propeller part 92, to which a leg piece 96 is also connected.
  • the cooler 42 ′ is followed by a blower housing 100 with a rectangular cross section, in which the blower 44 with the blower wheel 50 is provided.
  • the suction line 54 is connected to the inlet opening 58 arranged coaxially in the air filter 60, which is led through an opening 102 provided in the cooling air housing 74 and is connected to an opening 104 provided in the blower housing 100.
  • the cooling air emerging from the blower housing 100 can escape through the openings 69 provided in the front wall 28.
  • the drive of the suction part 66 '(FIG. 6) can be improved by using an additional propeller part 106 which is arranged on the same radius as the propeller part 90 or 92.
  • the propeller part 106 consists of an incision in the web 94 of the suction part 66 ′′ and is bent toward the surface of the air filter 60.
  • the surface of the propeller part 106 can run parallel to the surface of the propeller part 90 or 92.
  • dirt particles for example coffee parts
  • the suction part 66 which is driven either by the propeller 67 or by the propeller parts 90, 92, "S, the dirt particles can be easily sucked off the surface of the air filter, since in each case in the section of the air filter 60 , which is swept by the suction part 66, it is no longer possible to build up contact pressure which would press the dirt particles against the surface of the air filter 60.
  • the suction part 66 can be driven relatively quickly, even then if larger dirt particles act as an obstacle to the suction part 66, since the propeller 67 is on transfers relatively large torque to the suction part 66.
  • the suction part 66 If, however, the suction part 66 is not to be driven too quickly, it only needs to be provided with a propeller part 90 having a smaller area, by means of which the suction part 66 'or 66 "can be driven.
  • the speed of the suction part 66' can also be achieved thereby increase that in addition to the propeller parts 90 and 92, ribs are provided on the legs of the suction part 66 '.
  • the advantageous use of the propeller 67 or the propeller parts 90, 92 makes the use of a special drive device for the suction part 66, 66', 66 " superfluous.
  • the air filter 60 can be stationary, i. H.
  • the suction part 66 ' provided in the exemplary embodiment according to FIGS. 3 and 5 can also have a different cross section.
  • the suction part 66 ' can also taper from the center to its outer ends.
  • only one propeller or one suction part several propellers or suction parts can also be used.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combines (AREA)
  • Exhaust Silencers (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP81109690A 1981-11-14 1981-11-14 Reinigungsvorrichtung zum Reinigen des Luftfilters eines Kühlluftgehäuses mit einem ein Gebläse aufweisenden Kühler Expired EP0079399B1 (de)

Priority Applications (10)

Application Number Priority Date Filing Date Title
DE8181109690T DE3175314D1 (en) 1981-11-14 1981-11-14 Cleaning device to clean the air filter of a cooling air-casing comprising a fan-blown radiator
EP81109690A EP0079399B1 (de) 1981-11-14 1981-11-14 Reinigungsvorrichtung zum Reinigen des Luftfilters eines Kühlluftgehäuses mit einem ein Gebläse aufweisenden Kühler
US06/437,427 US4443236A (en) 1981-11-14 1982-10-28 Self-cleaning screen for the cooling air inlet of an engine enclosure
AU90275/82A AU550499B2 (en) 1981-11-14 1982-11-09 Filtering engine cooling air
CA000415324A CA1196582A (en) 1981-11-14 1982-11-10 Self-cleaning screen for the cooling air inlet of an engine enclosure
BR8206547A BR8206547A (pt) 1981-11-14 1982-11-11 Aparelho purificador de ar
ZA828293A ZA828293B (en) 1981-11-14 1982-11-11 Cleaning device for cleaning an air filter
DK504282A DK155451C (da) 1981-11-14 1982-11-12 Renseapparat til rensning af luftfilteret i et koelelufthus med en til en koeler hoerende blaeser
ES517312A ES517312A0 (es) 1981-11-14 1982-11-12 Dispositivo de limpieza para limpiar una superficie de aspiracion con aberturas de paso de un grupo de refrigeracion previsto en una maquina cosechadora.
MX195175A MX154662A (es) 1981-11-14 1982-11-12 Mejoras en un sistema de enfriamiento de un motor de combustion interna para vehiculos agricolas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81109690A EP0079399B1 (de) 1981-11-14 1981-11-14 Reinigungsvorrichtung zum Reinigen des Luftfilters eines Kühlluftgehäuses mit einem ein Gebläse aufweisenden Kühler

Publications (2)

Publication Number Publication Date
EP0079399A1 EP0079399A1 (de) 1983-05-25
EP0079399B1 true EP0079399B1 (de) 1986-09-10

Family

ID=8188015

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109690A Expired EP0079399B1 (de) 1981-11-14 1981-11-14 Reinigungsvorrichtung zum Reinigen des Luftfilters eines Kühlluftgehäuses mit einem ein Gebläse aufweisenden Kühler

Country Status (10)

Country Link
US (1) US4443236A (xx)
EP (1) EP0079399B1 (xx)
AU (1) AU550499B2 (xx)
BR (1) BR8206547A (xx)
CA (1) CA1196582A (xx)
DE (1) DE3175314D1 (xx)
DK (1) DK155451C (xx)
ES (1) ES517312A0 (xx)
MX (1) MX154662A (xx)
ZA (1) ZA828293B (xx)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
US6193772B1 (en) 1999-03-10 2001-02-27 Claas Selbstfahrende Erntemaschinen Gmbh Self-propelled harvesting machine having a selectively engageable suction cleaning device of a filter
DE19857681C2 (de) * 1998-12-14 2001-03-01 Krone Bernhard Gmbh Maschf Landwirtschaftliche Erntemaschine

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US5427502A (en) * 1994-03-28 1995-06-27 Deere & Company Fan shroud aspirator
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DE4425375B4 (de) * 1994-07-19 2005-10-20 Claas Kgaa Mbh Selbstfahrende Erntemaschine
US5466189A (en) * 1994-08-18 1995-11-14 Deere & Company Cleaner for a rotating screen on a harvester
US5676197A (en) 1996-07-30 1997-10-14 Deere & Company Mounting for drive mechanism of heat exchanger screen cleaning wand
US5944603A (en) * 1997-07-18 1999-08-31 Hay & Forage Industries Rotating radiator screen for crop harvester
JPH1178987A (ja) * 1997-09-05 1999-03-23 Kanzaki Kokyukoki Mfg Co Ltd トラクタの原動部構造
US6361093B2 (en) 1999-06-11 2002-03-26 Case Corporation Work vehicle grille screen
DE60033630T2 (de) * 1999-10-20 2007-11-22 Denso Corp., Kariya Frontwand
DE10012766B4 (de) * 2000-03-16 2009-08-20 Deere & Company, Moline Reinigungseinrichtung für ein Sieb und Fahrzeug mit Reinigungseinrichtung
US6523905B2 (en) * 2000-09-08 2003-02-25 Hitachi Construction Machinery Co., Ltd. Crawler carrier having an engine, a hydraulic pump and a heat exchanger positioned in a lateral direction
DE10225090A1 (de) * 2002-06-05 2003-12-18 Claas Selbstfahr Erntemasch Kühlluft-Reinigungseinrichtung
US6907854B2 (en) * 2003-09-30 2005-06-21 Deere & Company Fan shroud with internal aspirator
US7776119B2 (en) * 2004-02-04 2010-08-17 Notaras John A Air filter arrangement
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US7981175B2 (en) * 2007-04-18 2011-07-19 Cnh America Llc Self-cleaning blow-off
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GB0812966D0 (en) * 2008-07-16 2008-08-20 Cnh Belgium Nv Cleaning of an air filter screen of an agricultural vehicle
WO2010110973A1 (en) * 2009-03-26 2010-09-30 Crown Equipment Corporation Working vehicle having cooling system with suction device
US8919469B2 (en) 2010-08-26 2014-12-30 Caterpillar Inc. Ventilation system for engine and aftertreatment compartments and components
JP2012125191A (ja) * 2010-12-15 2012-07-05 Yanmar Co Ltd 走行台車
US8974564B2 (en) 2011-07-15 2015-03-10 Deere & Company Screen cleaning system
KR20130050051A (ko) * 2011-11-07 2013-05-15 현대자동차주식회사 차량용 냉각 장치
US20130248141A1 (en) * 2012-03-26 2013-09-26 Honda Motor Co., Ltd. Ducting arrangement and method for directing airflow toward a radiator
CA2779475C (en) * 2012-05-29 2015-04-07 Macdon Industries Ltd. Windrower tractor with parallel heat exchangers for cooling of engine and associated fluids
US9267407B2 (en) 2012-07-11 2016-02-23 South Dakota Board Of Regents Exhaust system air filtration housing
US10072664B2 (en) 2012-12-19 2018-09-11 Hamilton Sundstrand Corporation Debris filter for motor cooling inlet on ram air fan
BR112016028367B1 (pt) * 2014-06-02 2022-08-23 Cnh Industrial America Llc Tubo de sucção para uma caixa de refrigeração
JP6665622B2 (ja) * 2016-03-24 2020-03-13 株式会社豊田自動織機 ラジエタースクリーンユニット及び産業車両
JP6612175B2 (ja) * 2016-05-02 2019-11-27 ヤンマー株式会社 作業機及び田植機
DE102018114967A1 (de) * 2018-06-21 2019-12-24 Claas Selbstfahrende Erntemaschinen Gmbh Kühlerkorb mit einer Reinigungsvorrichtung
CN112970623B (zh) * 2019-12-02 2023-08-08 湖南万孚联合农牧科技股份有限公司 蛋鸡养殖的室内循环式通风装置
US11506111B2 (en) * 2020-04-08 2022-11-22 Deere & Company Work vehicle having an intake cleaning system with an alignment mechanism
CN115738520B (zh) * 2022-11-09 2024-07-30 珠海格力电器股份有限公司 一种过滤网清洁机构及具有其的衣物处理装置

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19857681C2 (de) * 1998-12-14 2001-03-01 Krone Bernhard Gmbh Maschf Landwirtschaftliche Erntemaschine
US6193772B1 (en) 1999-03-10 2001-02-27 Claas Selbstfahrende Erntemaschinen Gmbh Self-propelled harvesting machine having a selectively engageable suction cleaning device of a filter

Also Published As

Publication number Publication date
DK504282A (da) 1983-05-15
ES8308965A1 (es) 1983-10-01
DK155451B (da) 1989-04-10
AU550499B2 (en) 1986-03-20
EP0079399A1 (de) 1983-05-25
US4443236A (en) 1984-04-17
ZA828293B (en) 1984-06-27
DE3175314D1 (en) 1986-10-16
DK155451C (da) 1989-08-21
MX154662A (es) 1987-11-13
BR8206547A (pt) 1983-09-27
CA1196582A (en) 1985-11-12
ES517312A0 (es) 1983-10-01
AU9027582A (en) 1983-05-19

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