BE857176Q - Circuit d'irrigation et son procede de production - Google Patents

Circuit d'irrigation et son procede de production

Info

Publication number
BE857176Q
BE857176Q BE179658A BE179658A BE857176Q BE 857176 Q BE857176 Q BE 857176Q BE 179658 A BE179658 A BE 179658A BE 179658 A BE179658 A BE 179658A BE 857176 Q BE857176 Q BE 857176Q
Authority
BE
Belgium
Prior art keywords
production process
irrigation circuit
irrigation
circuit
production
Prior art date
Application number
BE179658A
Other languages
English (en)
French (fr)
Original Assignee
Ballas George Charles
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23770506&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=BE857176(Q) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ballas George Charles filed Critical Ballas George Charles
Application granted granted Critical
Publication of BE857176Q publication Critical patent/BE857176Q/xx

Links

Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G25/00Watering gardens, fields, sports grounds or the like
    • A01G25/06Watering arrangements making use of perforated pipe-lines located in the soil
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/0026Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting
    • B29B17/0042Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting for shaping parts, e.g. multilayered parts with at least one layer containing regenerated plastic
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00Hoses, i.e. flexible pipes
    • F16L11/04Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/12Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00Use of unspecified rubbers as moulding material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2030/00Pneumatic or solid tyres or parts thereof
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/62Plastics recycling; Rubber recycling
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/05Use of one or more blowing agents together
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/13Cell size and distribution control while molding a foam
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/911Recycling consumer used articles or products
    • Y10S264/912From toroidal shapes, e.g. resilient tires

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Soil Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Environmental Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Graft Or Block Polymers (AREA)
  • Molding Of Porous Articles (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
BE179658A 1974-02-26 1977-07-26 Circuit d'irrigation et son procede de production BE857176Q (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/445,866 US4003408A (en) 1974-02-26 1974-02-26 Underground irrigation porous pipe

Publications (1)

Publication Number Publication Date
BE857176Q true BE857176Q (fr) 1977-11-14

Family

ID=23770506

Family Applications (1)

Application Number Title Priority Date Filing Date
BE179658A BE857176Q (fr) 1974-02-26 1977-07-26 Circuit d'irrigation et son procede de production

Country Status (8)

Country Link
US (2) US4003408A (ja)
JP (2) JPS50119433A (ja)
BE (1) BE857176Q (ja)
DE (1) DE2506674A1 (ja)
FR (1) FR2261702B1 (ja)
GB (1) GB1470918A (ja)
IL (1) IL46519A (ja)
IT (1) IT1029843B (ja)

Families Citing this family (71)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4003408A (en) * 1974-02-26 1977-01-18 George C. Ballas, trustee Underground irrigation porous pipe
US4168799A (en) * 1977-09-16 1979-09-25 Entek Corporation Soaker hose
DE3046479A1 (de) * 1980-12-10 1982-07-22 Helmut Dr. 1000 Berlin Lorenz Emitter fuer die oberirdische und unterirdische tropfbewaesserung
DE3049558A1 (de) * 1980-12-31 1982-07-29 Akzo Gmbh, 5600 Wuppertal Unterirdische bewaesserung oder traenkung von boeden
JPS58167628A (ja) * 1982-03-27 1983-10-03 Toshiro Tabata 多孔性ホ−ス及びその製造法
DE3224324A1 (de) * 1982-06-30 1984-01-05 Basf Ag, 6700 Ludwigshafen Zweistufenverfahren zur herstellung von thermoplastischen polyurethan-elastomeren
JPS5983886A (ja) * 1982-11-05 1984-05-15 日本ゼオン株式会社 多孔性パイプ
US4517316A (en) * 1984-01-24 1985-05-14 Dasurat Enterprises Pte Ltd. Porous irrigation pipe prepared from particulate elastomer and thermoplastic binder containing controlled moisture content
US5015515A (en) * 1984-07-24 1991-05-14 Paulin Dale W Ventilated expandable boot
US4628073A (en) * 1984-10-03 1986-12-09 Monsanto Company Soft, rubbery, multiphase matrix material and methods for its production
JPH0530614Y2 (ja) * 1986-03-28 1993-08-05
JPS6434950U (ja) * 1987-08-26 1989-03-03
US4824287A (en) * 1988-02-19 1989-04-25 Tracy Lawrence M Septic system
US4970043A (en) * 1988-04-12 1990-11-13 Doan Rosetta C Process for forming thermoplastic material from granular scrap material
US4931236A (en) * 1989-03-10 1990-06-05 Seibolt Hettinga Method for forming irrigation pipe having a porous side wall
AU5529390A (en) * 1989-04-25 1990-11-16 Subrain, Ltd. Method and apparatus for the manufacture of porous pipe
US4958770A (en) * 1989-05-03 1990-09-25 Prescision Porous Pipe, Inc. Process for making uniform porosity flexible irrigation pipe
MX173573B (es) * 1989-06-19 1994-03-16 Subsurface Technology Corp Mejoras en tubo poroso y proceso para producirlo
US5051034A (en) * 1989-12-18 1991-09-24 Gas Research Institute Magnetically detectable plastic pipe
JPH0753406B2 (ja) * 1990-08-08 1995-06-07 東邦ポリマー工業株式会社 液体及び気体が透過可能なゴム成形品の製造方法
US5316708A (en) * 1990-09-17 1994-05-31 Terence Drews Method for making products made from recycled vehicle tires
NL9002673A (nl) * 1990-12-05 1992-07-01 Vredestein Icopro Bv Werkwijze voor het activeren van gevulcaniseerde afvalrubberdeeltjes en werkwijze voor het vervaardigen van een rubberachtig voorwerp onder toepassing van de geactiveerde afvalrubberdeeltjes.
US5114648A (en) * 1991-03-28 1992-05-19 Kuc Sr John Method of producing products from rubber compositions
US5861117A (en) * 1991-08-01 1999-01-19 Rumber Materials, Inc. Process and apparatus for cooling an extrudate
US5312573A (en) * 1991-08-01 1994-05-17 Renewed Materials Industries, Inc. Process for extruding mixtures of thermoplastic and thermoset materials
US5523328A (en) * 1991-08-01 1996-06-04 Renewed Materials Industries, Inc. Process and apparatus for extruding mixtures of thermoplastic and thermoset materials and products made therefrom
US5366365A (en) * 1992-06-04 1994-11-22 Sullivan Henry W Means for controlling feedstock compaction in forming flexible porous pipes of controlled pore size
WO1996005955A1 (en) * 1992-06-04 1996-02-29 Sullivan Henry W Apparatus for manufacturing flexible porous pipe
US5299885A (en) * 1992-08-14 1994-04-05 Aquapore Moisture Systems, Inc. Stabilized porous pipe
WO1995015677A1 (fr) * 1993-12-10 1995-06-15 Nippon Sanso Corporation Conduit d'irrigation de sol, procede d'irrigation de sol au moyen dudit conduit et procede d'alimentation du sol en gaz
FR2716835B1 (fr) * 1994-03-01 1996-04-26 Itep Int Procédé de fabrication d'un tuyau poreux, tuyau poreux obtenu par ledit procédé et utilisation d'un tel tuyau en irrigation.
US5534207A (en) * 1994-07-08 1996-07-09 Natural Resource Recovery, Inc. Method and apparatus for forming an article from recyclable plastic materials
US5692545A (en) * 1995-12-05 1997-12-02 Rodrigue; Wayne Fiber optic cable duct
EP0868278B1 (en) * 1995-12-12 2003-08-13 Uponor Innovation Ab Method for producing homogeneous material with an extruder, and extruder
US5733943A (en) * 1996-02-07 1998-03-31 Doan; Rosetta C. Street signs and other products and method for making same from used rubber tires
US6833396B2 (en) * 1996-07-15 2004-12-21 Dan R. Radke, Jr. Molding material made from recycled scrap tires
US5811164A (en) * 1996-09-27 1998-09-22 Plastic Specialties And Technologies Investments, Inc. Aeration pipe and method of making same
US5811038A (en) * 1996-09-27 1998-09-22 Plastic Specialties And Technologies Investments, Inc. Method of blending components for porous plastic pipe processing
US5816742A (en) * 1996-09-30 1998-10-06 Cordewener; Charles H. Permeable conduits for disbursing fluids
WO1998017938A1 (de) * 1996-10-24 1998-04-30 Ila Ag Ingenieurgesellschaft Für Lufttechnische Anlagen Von abgas durchströmtes rohrstück eines abgasführenden rohrleitungssystems, sowie dieses rohrleitungssystem
US5921711A (en) * 1997-01-23 1999-07-13 Sipaila; Jonas Z. Subsurface fluid distribution apparatus and method
KR100295574B1 (ko) * 1997-01-27 2001-10-24 이병걸 섬유수지복합부재및그제조방법
EP0965434A1 (en) * 1998-06-16 1999-12-22 Arte Plast S.a.s., di Giuseppe Micciche & C. Process and device for the continuous production of bar shapes of recycled heterogeneous plastics mixes
US6446383B1 (en) 1998-07-02 2002-09-10 Tom Hoshall Subsurface pesticide injection and fluid extraction system
US6129877A (en) * 1998-09-04 2000-10-10 Kuc, Sr.; John Method and system for fabricating elastomeric articles
US6142703A (en) * 1999-03-01 2000-11-07 Wilmot; Charles Encapsulated turf maintenance system
US6511054B1 (en) 2000-10-05 2003-01-28 Truman Green Porous air diffuser for treatment of liquids
JP3902927B2 (ja) * 2001-08-10 2007-04-11 日本化学販売株式会社 排水管
US20050206029A1 (en) * 2001-10-24 2005-09-22 Moore Roy E Jr Method for recycling carpet and articles made therefrom
WO2003035350A1 (en) * 2001-10-24 2003-05-01 Infiltrator Systems, Inc. A method for recycling carpet and articles made therefrom
CA2378922C (en) * 2002-01-16 2009-01-27 Rutgers, The State University Of New Jersey Compositions and methods of making plastic articles from polymer blends containing polyethylene
US6972144B2 (en) 2002-04-19 2005-12-06 Hunter Paine Enterprises, Llc Composite structural material and method of making same
WO2003106769A1 (en) 2002-06-14 2003-12-24 Ace Tire & Parts, Inc. Recyclable composite material and method of using composite
GB2399532B (en) * 2003-03-19 2007-10-24 Econoplas Ltd Method of manufacturing drainage/irrigation elements from recycled plastics
US6877272B2 (en) 2003-04-10 2005-04-12 Tom Hoshall Method of applying pesticide
US20050150983A1 (en) * 2004-01-08 2005-07-14 Yang Lung Y. Flexible hose device for spraying purposes
US20060043219A1 (en) * 2004-09-02 2006-03-02 Moshe Raanan Drip irrigation pipe
TW200635830A (en) * 2004-12-29 2006-10-16 Hunter Paine Entpr Llc Composite structural material and method of making the same
US20070189852A1 (en) * 2006-01-31 2007-08-16 Greg Wolfley Modular network irrigation system
CN101152639B (zh) * 2006-09-29 2010-05-19 台州标新铝塑工业有限公司 一种微孔渗水管的制备方法和以该方法制备的产品
US7451568B2 (en) * 2007-03-06 2008-11-18 Tom Hoshall Subsurface insect detection and pesticide injection system
DE102008006276A1 (de) * 2008-01-25 2009-07-30 Gerhardt Friedel Verfahren zur Herstellung eines porösen Schlauchs
DE102008008035B4 (de) * 2008-02-05 2010-06-02 Oleksandr Gitelman Verfahren zur Herstellung von Polyamidschaum
US20120279120A1 (en) * 2010-10-28 2012-11-08 Agrosci, Inc. Subsurface heat actuated evaporative irrigation method and system
US8409321B2 (en) * 2010-12-06 2013-04-02 Tekni-Plex, Inc. Method and apparatus for leaching metal from mining ore
CN103835189B (zh) * 2013-12-27 2017-02-08 李嘉晖 低温环境下新型建筑材料的研究方法
CN105415531A (zh) * 2015-10-21 2016-03-23 宁波绿华橡塑机械工贸有限公司 废旧橡塑料韧性增强设备
US10010031B1 (en) 2017-05-25 2018-07-03 Xue Wu Liu Multifunctional underground irrigation system
US10786937B2 (en) * 2018-07-10 2020-09-29 Ningxia University Processing technology for making seepage irrigation pipe with alternate effluent section and non-effluent section
CN108935031A (zh) * 2018-07-12 2018-12-07 安徽独秀山蓝莓科技开发有限公司 一种蓝莓种植用喷水设备
US10703909B1 (en) 2019-02-23 2020-07-07 Kenneth Nystrom Products by upcycling landfill waste streams

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US968226A (en) * 1909-09-29 1910-08-23 Robert L Ziller Porous pipe and method of manufacturing the same.
US1254906A (en) * 1916-08-24 1918-01-29 Alexander Franklin Henderson Surface-irrigating system.
US1427754A (en) * 1921-03-31 1922-08-29 And herman w
US1952766A (en) * 1930-01-02 1934-03-27 Mazer Jacob Sound absorbing material and method of making the same
US1989427A (en) * 1932-02-29 1935-01-29 Michigan State Board Of Agricu Irrigation apparatus
DE687877C (de) * 1936-12-23 1940-02-08 Juan Duarry Pressform zum Herstellen von Gegenstaenden aus Kautschukstaub
US2354260A (en) * 1941-04-26 1944-07-25 Celanese Corp Cellular material
US2336734A (en) * 1941-11-29 1943-12-14 Kellogg M W Co Extrusion of substantially surfacedry nonplastic material
US2645249A (en) * 1949-04-30 1953-07-14 Oscar C Stahl Plastic resin tubing and method of making the same
US2554607A (en) * 1950-07-18 1951-05-29 William H Woolf Process of remolding vulcanized rubber
US2723934A (en) * 1953-10-05 1955-11-15 B B Chem Co Porous rubber materials
US2871774A (en) * 1955-02-24 1959-02-03 Us Rubber Reclaiming Co Process of forming flooring surfaces with asphalt coated rubber pellets
US3027599A (en) * 1956-06-15 1962-04-03 Trachta Josef Method of molding articles from scrap tire material
US2807505A (en) * 1956-07-02 1957-09-24 Shuford Mills Soil soaking devices
US3267187A (en) * 1963-10-10 1966-08-16 American Biltrite Rubber Co Textured sheet material
FR1405962A (fr) * 1964-06-03 1965-07-16 Procédé de fabrication de tuyaux poreux notamment pour le drainage des sols, et tuyaux ainsi obtenus
US3552654A (en) * 1967-06-22 1971-01-05 Lewis C Thomas Irrigation conduit and composition and method for producing such
US3558753A (en) * 1967-11-13 1971-01-26 Int Plastics Method of producing a porous resin by withdrawing gas from a foam extrudate while it is in a semi-molten state
US3774648A (en) * 1967-11-13 1973-11-27 Int Plastics Porous plastic structures having apertures
FR1595416A (ja) * 1968-01-19 1970-06-08
BE795486Q (fr) * 1969-11-03 1973-05-29 Ringdal Lars Procede de preparation d'objets en matiere thermoplastique
US3912800A (en) * 1970-09-21 1975-10-14 Int Plastics Method of producing porous polymeric articles
JPS4823874U (ja) * 1971-07-27 1973-03-19
US3836423A (en) * 1971-09-09 1974-09-17 Hooker Chemical Corp Method of introducing air permeability into a non-porous continuous film and resultant film
JPS5123099Y2 (ja) * 1971-09-28 1976-06-14
US4003408A (en) * 1974-02-26 1977-01-18 George C. Ballas, trustee Underground irrigation porous pipe
US4028288A (en) * 1976-02-03 1977-06-07 Tire Recyclers International, Inc. Moldable end products from primarily reclaimable waste materials

Also Published As

Publication number Publication date
FR2261702B1 (ja) 1978-12-29
JPS5659855U (ja) 1981-05-22
DE2506674A1 (de) 1975-08-28
IL46519A (en) 1977-05-31
US4110420A (en) 1978-08-29
IT1029843B (it) 1979-03-20
GB1470918A (en) 1977-04-21
JPS50119433A (ja) 1975-09-18
US4003408A (en) 1977-01-18
FR2261702A1 (ja) 1975-09-19
IL46519A0 (en) 1975-04-25

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