ZA746432B - Backflow prevention apparatus - Google Patents

Backflow prevention apparatus

Info

Publication number
ZA746432B
ZA746432B ZA00746432A ZA746432A ZA746432B ZA 746432 B ZA746432 B ZA 746432B ZA 00746432 A ZA00746432 A ZA 00746432A ZA 746432 A ZA746432 A ZA 746432A ZA 746432 B ZA746432 B ZA 746432B
Authority
ZA
South Africa
Prior art keywords
backflow prevention
prevention apparatus
backflow
prevention
Prior art date
Application number
ZA00746432A
Inventor
D Griswold
R Veit
Original Assignee
Griswold Controls
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 Griswold Controls filed Critical Griswold Controls
Publication of ZA746432B publication Critical patent/ZA746432B/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
ZA00746432A 1973-10-26 1974-10-09 Backflow prevention apparatus ZA746432B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US41017373A 1973-10-26 1973-10-26

Publications (1)

Publication Number Publication Date
ZA746432B true ZA746432B (en) 1976-06-30

Family

ID=23623549

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00746432A ZA746432B (en) 1973-10-26 1974-10-09 Backflow prevention apparatus

Country Status (8)

Country Link
JP (1) JPS5083819A (en)
BR (1) BR7408966D0 (en)
CA (1) CA1066164A (en)
DE (1) DE2450465A1 (en)
FR (2) FR2250939B1 (en)
GB (1) GB1490553A (en)
IL (1) IL45802A (en)
ZA (1) ZA746432B (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3996962A (en) * 1976-03-19 1976-12-14 Rockwell International Corporation Backflow preventer and relief valve assembly
US4185656A (en) * 1977-12-13 1980-01-29 Braukmann Armaturen Ag Dual check valve structure
US4232704A (en) * 1978-03-28 1980-11-11 Amtrol Inc. In line back flow preventer
US4241752A (en) * 1978-05-30 1980-12-30 Watts Regulator Company Backflow preventer
US4231387A (en) * 1979-01-11 1980-11-04 Chas. M. Bailey Co., Inc. Backflow preventing valve
DE3322771A1 (en) * 1983-06-24 1985-01-03 Alfred Teves Gmbh, 6000 Frankfurt VALVE ARRANGEMENT TO LIMIT THE PRESSURE IN A PRINTING SYSTEM
DE3742207A1 (en) * 1987-12-12 1989-06-22 Lang Apparatebau Gmbh BACKFLOW PREVENTORS, ESPECIALLY FOR INSTALLATION IN DRINKING WATER PIPES
DE3936962A1 (en) * 1989-11-07 1991-05-08 Waletzko Armaturen Gmbh BACKFLOW PREVENTORS, ESPECIALLY FOR INSTALLATION IN DRINKING WATER PIPES
US5107888A (en) * 1989-11-13 1992-04-28 Cmb Industries, Inc. N-shaped backflow preventor
US5226441A (en) * 1989-11-13 1993-07-13 Cmb Industries Backflow preventor with adjustable outflow direction
US5046525A (en) * 1990-06-15 1991-09-10 Ames Company, Inc. Differential loading fluid check valve
DE4309085C1 (en) * 1993-03-20 1995-01-05 Schubert & Salzer Ag System separator
JP3016993U (en) * 1995-04-14 1995-10-17 株式会社タブチ Compound non-return type universal joint
DE29605420U1 (en) * 1996-03-23 1996-06-13 Festo Kg Quick exhaust valve for pneumatic applications
DE10201626A1 (en) 2002-01-16 2003-07-31 Wildfang Dieter Gmbh check valve
DE202004016530U1 (en) * 2004-10-25 2006-03-02 Gebr. Kemper Gmbh & Co. Kg Metallwerke Pipe aerator and shut-off valve of a water installation with pipe aerator
JP5189399B2 (en) 2008-04-07 2013-04-24 国立大学法人信州大学 Check valve
JP5189403B2 (en) * 2008-05-08 2013-04-24 国立大学法人信州大学 Backflow prevention device
CN103742390B (en) * 2013-11-28 2015-10-28 成都欧浦特控制阀门有限公司 A kind of air pump being provided with coil tension spring
CN103697198B (en) * 2013-12-24 2016-06-22 泉州市沪航阀门制造有限公司 Double-chamber control mechanism of pressure difference principle backflow preventer
KR102393812B1 (en) * 2018-03-12 2022-05-03 가부시키가이샤 이시자키 Reciprocating bodies for check valves and check valves

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1710635A (en) * 1924-08-06 1929-04-23 Mortimer C Rosenfeld Valve
US3283772A (en) * 1964-02-04 1966-11-08 Donald G Griswold Backflow prevention device with improved pressure sensing means

Also Published As

Publication number Publication date
FR2250939B1 (en) 1978-08-11
FR2257834B1 (en) 1979-10-05
DE2450465A1 (en) 1975-04-30
CA1066164A (en) 1979-11-13
FR2250939A1 (en) 1975-06-06
GB1490553A (en) 1977-11-02
FR2257834A1 (en) 1975-08-08
IL45802A (en) 1977-05-31
BR7408966D0 (en) 1975-09-23
AU7418174A (en) 1976-04-15
JPS5083819A (en) 1975-07-07
IL45802A0 (en) 1975-03-13

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