DK1649113T3 - Backflow preventer - Google Patents

Backflow preventer

Info

Publication number
DK1649113T3
DK1649113T3 DK04763544T DK04763544T DK1649113T3 DK 1649113 T3 DK1649113 T3 DK 1649113T3 DK 04763544 T DK04763544 T DK 04763544T DK 04763544 T DK04763544 T DK 04763544T DK 1649113 T3 DK1649113 T3 DK 1649113T3
Authority
DK
Denmark
Prior art keywords
housing
opening
backflow preventer
return
return valve
Prior art date
Application number
DK04763544T
Other languages
Danish (da)
Inventor
Ronald Krauter
Martin Kloepfer
Original Assignee
Kaercher Gmbh & Co Kg 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 Kaercher Gmbh & Co Kg Alfred filed Critical Kaercher Gmbh & Co Kg Alfred
Application granted granted Critical
Publication of DK1649113T3 publication Critical patent/DK1649113T3/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
    • E03C1/106—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using two or more check valves
    • 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
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/06—Check valves with guided rigid valve members with guided stems
    • F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
    • F16K15/066—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring with a plurality of valve members

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Multiple-Way Valves (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

The device has a housing (12) provided with at least one leakage opening (23) between an inlet opening (18) and an outlet opening (19) and 2 successive non-return valves (54,74), the first of which is displaced relative to the housing for controlling the flow connection between the inner space between the non-return valves and the leakage opening. The second non-return valve is supported so that it can slide relative to the housing without impairing the sliding movement of the first non-return valve.
DK04763544T 2003-07-28 2004-07-28 Backflow preventer DK1649113T3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10335379A DE10335379B9 (en) 2003-07-28 2003-07-28 backflow preventer
PCT/EP2004/008416 WO2005012654A2 (en) 2003-07-28 2004-07-28 Backflow preventer

Publications (1)

Publication Number Publication Date
DK1649113T3 true DK1649113T3 (en) 2008-03-31

Family

ID=33395083

Family Applications (1)

Application Number Title Priority Date Filing Date
DK04763544T DK1649113T3 (en) 2003-07-28 2004-07-28 Backflow preventer

Country Status (8)

Country Link
EP (1) EP1649113B1 (en)
CN (1) CN100478530C (en)
AT (1) ATE386171T1 (en)
DE (1) DE10335379B9 (en)
DK (1) DK1649113T3 (en)
ES (1) ES2298797T3 (en)
PT (1) PT1649113E (en)
WO (1) WO2005012654A2 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10335379B9 (en) * 2003-07-28 2005-03-24 Alfred Kärcher Gmbh & Co. Kg backflow preventer
DE102005021657A1 (en) * 2005-05-06 2006-11-23 H. Lüdi + Co. AG Gas- und Energiesysteme Laboratory tap has non-return valve near inlet and second valve near outlet which closes automatically when liquid pressure drops below predetermined value
DE102005031422C5 (en) 2005-07-04 2012-09-27 Hans Sasserath & Co. Kg Backflow
DE102005062517B3 (en) * 2005-12-15 2007-05-31 Alfred Kärcher Gmbh & Co. Kg Backflow preventer has valve housing which has two separated annular grooves arranged outside in flow direction whereby seal rings are arranged in each annular groove
DE102005062518A1 (en) * 2005-12-15 2007-06-21 Alfred Kärcher Gmbh & Co. Kg Backflow preventer
US20070204917A1 (en) * 2006-03-01 2007-09-06 Rain Bird Corporation Backflow prevention device
GB0709906D0 (en) * 2007-05-23 2007-07-04 Anson Ltd Valves
CN101749461B (en) * 2008-12-15 2011-06-08 刘永 Screw-thread backflow prevention device being free from being equipped with external conduit
CN102287555B (en) * 2011-07-18 2012-12-26 浙江盾安阀门有限公司 Built-in drainage type pressure-reducing backflow prevention device
CN102252116B (en) * 2011-07-18 2013-03-20 浙江盾安阀门有限公司 Diaphragm-inbuilt type low-resistance backflow preventer
CN210141348U (en) 2019-03-20 2020-03-13 苏州天健云康信息科技有限公司 Split type micro valve and micro fluid device
CN106310512A (en) * 2016-09-22 2017-01-11 苏州天健云康信息科技有限公司 Split type micro valve
CN108869761B (en) * 2018-09-17 2024-03-15 东莞珀力伟动力科技有限公司 Mute improved control valve of oil pump

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2424978C2 (en) * 1974-05-22 1985-01-10 Honeywell-Braukmann GmbH, 6950 Mosbach Pipe interrupter, in particular for domestic water pipes
DE4323496C2 (en) * 1993-07-14 2002-08-01 Grohe Armaturen Friedrich transfer valve
JP3162037B2 (en) * 1999-06-29 2001-04-25 兼工業株式会社 Backflow prevention device
DE10214747A1 (en) * 2002-04-03 2003-10-16 Sasserath & Co Kg H Valve arrangement for a pipe separator
DE10335379B9 (en) * 2003-07-28 2005-03-24 Alfred Kärcher Gmbh & Co. Kg backflow preventer
DE10335380B3 (en) * 2003-07-28 2004-11-25 Alfred Kärcher Gmbh & Co. Kg Back flow prevention device for drinking water line has 2 successive non-return valves within inner housing displaced within outer housing for controlling leakage openings

Also Published As

Publication number Publication date
EP1649113A2 (en) 2006-04-26
EP1649113B1 (en) 2008-02-13
ATE386171T1 (en) 2008-03-15
CN1813110A (en) 2006-08-02
DE10335379B3 (en) 2004-11-25
DE10335379B9 (en) 2005-03-24
WO2005012654A3 (en) 2005-04-14
WO2005012654A2 (en) 2005-02-10
CN100478530C (en) 2009-04-15
PT1649113E (en) 2008-03-07
ES2298797T3 (en) 2008-05-16

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