WO1987002402A1 - Backflow preventer apparatus for fluid flow lines - Google Patents

Backflow preventer apparatus for fluid flow lines Download PDF

Info

Publication number
WO1987002402A1
WO1987002402A1 PCT/US1986/002143 US8602143W WO8702402A1 WO 1987002402 A1 WO1987002402 A1 WO 1987002402A1 US 8602143 W US8602143 W US 8602143W WO 8702402 A1 WO8702402 A1 WO 8702402A1
Authority
WO
WIPO (PCT)
Prior art keywords
backflow
relief valve
fluid flow
fluid
backflow preventer
Prior art date
Application number
PCT/US1986/002143
Other languages
French (fr)
Inventor
Zvi Weingarten
Original Assignee
Zvi Weingarten
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 Zvi Weingarten filed Critical Zvi Weingarten
Priority to DE8686906592T priority Critical patent/DE3664351D1/en
Publication of WO1987002402A1 publication Critical patent/WO1987002402A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/104—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using a single check valve
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/108—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves having an aerating valve
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/3149—Back flow prevention by vacuum breaking [e.g., anti-siphon devices]
    • Y10T137/3185—Air vent in liquid flow line
    • Y10T137/3294—Valved
    • Y10T137/3331—With co-acting valve in liquid flow path

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Check Valves (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

Backflow preventer apparatus (10) for preventing backflow of fluid in a fluid flow line includes an improved relief valve which drains fluid backflow from a zone between upstream (12) and downstream check valves (16) if the normal flow is shut off and downstream check valve (16) fails to seal drip tight. During normal flow, the relief valve is closed. The relief valve includes a ''peel seal'' formed by a flexible diaphragm (46) which peels to open the relief valve orifice (24c) for backflow therethrough from the downstream check valve (16) to the ambient atmosphere.
PCT/US1986/002143 1985-10-21 1986-10-10 Backflow preventer apparatus for fluid flow lines WO1987002402A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8686906592T DE3664351D1 (en) 1985-10-21 1986-10-10 Backflow preventer apparatus for fluid flow lines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US789,449 1985-10-21
US06/789,449 US4658852A (en) 1985-10-21 1985-10-21 Backflow preventer apparatus for fluid flow lines

Publications (1)

Publication Number Publication Date
WO1987002402A1 true WO1987002402A1 (en) 1987-04-23

Family

ID=25147675

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1986/002143 WO1987002402A1 (en) 1985-10-21 1986-10-10 Backflow preventer apparatus for fluid flow lines

Country Status (7)

Country Link
US (1) US4658852A (en)
EP (1) EP0243454B1 (en)
JP (1) JPS63501815A (en)
AU (1) AU582923B2 (en)
DE (1) DE3664351D1 (en)
IL (1) IL80334A (en)
WO (1) WO1987002402A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989010509A1 (en) * 1988-04-22 1989-11-02 Burnetta Pty. Ltd. Backflow prevention valve
EP0370431A1 (en) * 1988-11-23 1990-05-30 Honeywell-Braukmann GmbH Backflow prevention valve
EP0671515A1 (en) * 1994-03-10 1995-09-13 S.A. Haudiquer Industrie Safety device to be mounted between the drinking water distribution network pipe and a feed pipe for a consumer apparatus, like a heater boiler

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU579785B2 (en) * 1986-12-11 1988-12-08 Queensland Plumbing Pty Ltd Valve assembly
WO1989011611A1 (en) * 1988-05-18 1989-11-30 Valvtec Pty Ltd Backflow preventer valve
US4976279A (en) * 1989-11-20 1990-12-11 King Lloyd H Sr Self-draining backflow prevention valve
US5228470A (en) * 1992-01-22 1993-07-20 A. W. Cash Valve Manufacturing Corporation Self draining hose connection dual check valve back flow preventer
US5355907A (en) * 1992-05-18 1994-10-18 Hoeptner Iii Herbert W Automatic draining back flow preventer for use with hydrant
WO1995000784A1 (en) * 1993-06-23 1995-01-05 Valvtec Pty. Ltd. Reduced pressure zone backflow prevention valve
AU687822B2 (en) * 1993-06-23 1998-03-05 Tyco Flow Control Pacific Pty Ltd Reduced pressure zone backflow prevention valve
US5566704A (en) * 1995-01-06 1996-10-22 Watts Investment Company Backflow preventer and test cock assembly
US5752542A (en) * 1996-01-22 1998-05-19 Hoeptner, Iii; Herbert W. Back flow preventing adjustable valve apparatus
FR2775784B1 (en) * 1998-03-05 2000-05-12 Francois Lafay LEAK DETECTION DEVICE FOR WATER SUPPLY INSTALLATION
US5950653A (en) * 1998-03-27 1999-09-14 Folsom; William D. High pressure relief valve for use with a backflow preventer
US6397878B1 (en) * 1999-08-05 2002-06-04 Watts Regulator Co. High pressure hose drop backflow/back siphonage preventers
US7591802B2 (en) * 2005-04-29 2009-09-22 Applied Medical Resources Corporation Seal housing having anti-inversion features
US20070193633A1 (en) * 2006-02-17 2007-08-23 Conbraco Industries, Inc. Self-contained check valve module
US7458388B2 (en) * 2006-04-18 2008-12-02 Chung Yi Huang Freeze safe valve
US9016319B2 (en) * 2007-08-22 2015-04-28 Societe Bic Relief valves for fuel cell systems
JP5189399B2 (en) * 2008-04-07 2013-04-24 国立大学法人信州大学 Check valve
US8281810B2 (en) * 2008-04-30 2012-10-09 The Viking Corporation Dry valve for sprinkler system
JP5189403B2 (en) * 2008-05-08 2013-04-24 国立大学法人信州大学 Backflow prevention device
WO2014072979A1 (en) * 2012-11-08 2014-05-15 S.P.C. Tech Ltd. Check valve

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3171423A (en) * 1961-07-24 1965-03-02 Watts Regulator Co Combination anti-siphon valve and backflow preventer
US3283772A (en) * 1964-02-04 1966-11-08 Donald G Griswold Backflow prevention device with improved pressure sensing means
US3346001A (en) * 1965-05-04 1967-10-10 Irving Terry Backflow preventing valve
US3850190A (en) * 1973-09-17 1974-11-26 Mark Controls Corp Backflow preventer
EP0002600A1 (en) * 1977-12-13 1979-06-27 Honeywell-Braukmann GmbH Check valve structure
US4506694A (en) * 1982-05-28 1985-03-26 Mueller Co. Relief valve assembly for use with backflow preventers
US4552177A (en) * 1983-06-13 1985-11-12 Laitram Corporation, Inc. Hermetically sealed valve

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2414893C2 (en) * 1974-03-28 1985-01-17 Honeywell-Braukmann GmbH, 6950 Mosbach Backflow preventer
US3952766A (en) * 1974-08-13 1976-04-27 Jh Industries, Inc. Backflow preventer
US4232704A (en) * 1978-03-28 1980-11-11 Amtrol Inc. In line back flow preventer
US4276897A (en) * 1978-06-23 1981-07-07 Griswold Controls Backflow prevention apparatus
DE3266453D1 (en) * 1982-01-26 1985-10-31 Socla Back flow preventer for hydraulic conduits
EP0189499B1 (en) * 1985-01-30 1987-05-20 Honeywell-Braukmann GmbH Tube disconnector

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3171423A (en) * 1961-07-24 1965-03-02 Watts Regulator Co Combination anti-siphon valve and backflow preventer
US3283772A (en) * 1964-02-04 1966-11-08 Donald G Griswold Backflow prevention device with improved pressure sensing means
US3346001A (en) * 1965-05-04 1967-10-10 Irving Terry Backflow preventing valve
US3850190A (en) * 1973-09-17 1974-11-26 Mark Controls Corp Backflow preventer
EP0002600A1 (en) * 1977-12-13 1979-06-27 Honeywell-Braukmann GmbH Check valve structure
US4506694A (en) * 1982-05-28 1985-03-26 Mueller Co. Relief valve assembly for use with backflow preventers
US4552177A (en) * 1983-06-13 1985-11-12 Laitram Corporation, Inc. Hermetically sealed valve

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989010509A1 (en) * 1988-04-22 1989-11-02 Burnetta Pty. Ltd. Backflow prevention valve
EP0370431A1 (en) * 1988-11-23 1990-05-30 Honeywell-Braukmann GmbH Backflow prevention valve
EP0671515A1 (en) * 1994-03-10 1995-09-13 S.A. Haudiquer Industrie Safety device to be mounted between the drinking water distribution network pipe and a feed pipe for a consumer apparatus, like a heater boiler
FR2717200A1 (en) * 1994-03-10 1995-09-15 Haudiquer Ind Safety device intended to be interposed between the driving of a drinking water distribution network and the supply line of a water-using device, such as a boiler.

Also Published As

Publication number Publication date
DE3664351D1 (en) 1989-08-17
AU582923B2 (en) 1989-04-13
AU6525086A (en) 1987-05-05
JPS63501815A (en) 1988-07-21
US4658852A (en) 1987-04-21
EP0243454A1 (en) 1987-11-04
IL80334A (en) 1992-05-25
EP0243454B1 (en) 1989-07-12

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